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| Delaware                                                                              | 52-2107911                           |
|---------------------------------------------------------------------------------------|--------------------------------------|
| (State of incorporation)                                                              | (I.R.S. Employer Identification No.) |
|                                                                                  |
| Two Democracy Center,  6903 Rockledge Drive, Bethesda, Maryland 20817  |
| (301) 564-3200                                                                   |

| Title of each class                                                   | Name of each exchange on which registered      |
|-----------------------------------------------------------------------|------------------------------------------------|
| Common Stock, par value $.10 per sharePreferred Stock Purchase Rights | New York Stock ExchangeNew York Stock Exchange |

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|          |                                                                                           | Page      |
|---------------|------------------------------------------------------------------------------------------------|-----------|
|          | PART III                                                                                       |      |
| Item 10.      | Directors, Executive Officers and Corporate Governance                                         |   2  |
| Item 11.      | Executive Compensation                                                                         |   5  |
| Item 12.      | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters |   35 |
| Item 13.      | Certain Relationships and Related Transactions, and Director Independence                      |   37 |
| Item 14.      | Principal Accountant Fees and Services                                                         |   38 |
|          | PART IV                                                                                        |      |
| Item 15.      | Exhibits and Financial Statement Schedules                                                     |   38 |
| Signatures    |   39                                                                                      |
| Exhibit Index |   41                                                                                      |

Item

| James R. Mellor                                                                                  Director since 1998Age 82                                                                                                                                                                                                         |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Mr. Mellor retired in 1997 as Chairman and Chief Executive Officer of General Dynamics Corporation, a company engaged in shipbuilding and marine systems, land and amphibious combat systems, information systems, and business aviation businesses, a position he held since 1994. Prior to assuming that position, Mr. Mellor was President and Chief Executive Officer from 1993 to 1994 and was previously President and Chief Operating Officer of General Dynamics. Mr. Mellor served as interim President and Chief Executive Officer of the Company from December 2004 to October 2005. Mr. Mellor previously served on the Board of Directors of AmerisourceBergen Corporation, Computer Sciences Corporation, Net2Phone, Inc. and IDT Corporation. |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| In concluding that Mr. Mellor should serve as a director, the Board considered the following key competencies: USEC leadership as current Chairman and formerly as interim CEO; CEO experience; government contracting experience; and public company board experience. Mr. Mellor has served as USEC’s Chairman since USEC’s privatization in 1998.                                                                                                                                                                                                                                                                                                                                                                                             |

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|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Sigmund L. Cornelius                                                                                  Director since 2011Age 58                                                                                                                                                                                                                                                                                                     |
| Mr. Cornelius retired in January 2011 from ConocoPhillips, an integrated energy company, where he was Senior Vice President, Finance, and Chief Financial Officer from 2008 to 2010. Prior to that, Mr. Cornelius served as Senior Vice President, Planning, Strategy and Corporate Affairs from 2007 to 2008, having previously served as President, Exploration and Production – Lower 48 from 2006 to 2007 and President, Global Gas from 2004 to 2006. Mr. Cornelius joined ConocoPhillips predecessor Conoco Inc. in 1980. Mr. Cornelius also serves on the Board of Directors of Carbo Ceramics Inc., NiSource Inc., Parallel Energy Trust and Western Refining, Inc.                                                                                                                                                                        |
|  In concluding that Mr. Cornelius should serve as a director, the Board considered the following key competencies: CFO experience; audit committee financial expert; energy experience; business operations experience; and public company board experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| Joseph T. Doyle                                                                                  Director since 2006Age 65                                                                                                                                                                                                                                                                                                          |
| Mr. Doyle is a consultant to and a director of several for-profit companies and not-for-profit organizations. From July 2002 through March 2003, he served as Senior Vice President and Chief Financial Officer of Foster Wheeler, Inc. Prior to joining Foster Wheeler, Mr. Doyle was Executive Vice President and Chief Financial Officer of U.S. Office Products from 1998 through 2001, Chief Financial Officer of Westinghouse Electric Company’s Industrial Group from 1996 through 1998, and Chief Financial Officer of Allison Engine Company (now Rolls Royce Allison) from 1994 through 1996.                                                                                                                                                                                                                                                 |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| In concluding that Mr. Doyle should serve as a director, the Board considered the following key competencies: CFO and 17 years of public accounting experience; audit committee financial expert; internal audit experience; nuclear submarine and nuclear energy and power experience; and engineering and construction experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| H. William Habermeyer                                                                                  Director since 2008Age 70                                                                                                                                                                                                                                                                                                    |
| Mr. Habermeyer retired in 2006 as President and Chief Executive Officer of Progress Energy Florida, a subsidiary of Progress Energy, Inc., a diversified energy company. Mr. Habermeyer joined Progress Energy predecessor, Carolina Power & Light in 1993 and served as Vice President of Nuclear Services and Environmental Support, Vice President of Nuclear Engineering, and Vice President of the Western Region in North Carolina, before assuming the role of President and Chief Executive Officer of Progress Energy Florida in 2000. Prior to that, Mr. Habermeyer had a 28-year career in the U.S. Navy, retiring as a Rear Admiral. Mr. Habermeyer also serves on the Board of Directors of Raymond James Financial, Inc. and Southern Company.                                                                                              |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| In concluding that Mr. Habermeyer should serve as a director, the Board considered the following key competencies: CEO experience; business operations experience, including operating and managing nuclear powered submarines and commercial nuclear power plants; nuclear engineering experience; electric utility experience; and public company board experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| William J. Madia                                                                                  Director since 2008Age 65                                                                                                                                                                                                                                                                                                         |
| Dr. Madia is a vice president at Stanford University responsible for oversight of the SLAC National Accelerator Laboratory, a U.S. Department of Energy ("DOE") national science lab. Dr. Madia retired in 2007 as Executive Vice President of Laboratory Operations of the Battelle Memorial Institute, a non-profit independent research and development organization, where he oversaw the management or co-management of six DOE National Laboratories. Dr. Madia served in that position from 1999. In addition, he was President and CEO of UT-Battelle, LLC, he managed Battelle’s global environmental business, served as president of Battelle Technology International, director of Battelle’s Columbus Laboratories, and corporate vice president and general manager of Battelle’s Project Management Division. |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| In concluding that Dr. Madia should serve as a director, the Board considered the following key competencies: science and technology experience, including a PhD in nuclear chemistry; nuclear experience; DOE experience, including the management of six DOE laboratories; and executive and management experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| W. Henson Moore                                                                                  Director since 2001Age 73                                                                                                                                                                                                                                                                                                          |
| Mr. Moore was President and Chief Executive Officer of the American Forest and Paper Association, the national trade association of the forest, paper and wood products industry, from 1995 to 2006. He was also President of the International Council of Forest Product Associations from 2002 to 2004. Mr. Moore was previously Deputy Secretary of Energy from 1989 to 1992 and in 1992 became Deputy Chief of Staff for President George Bush. From 1975 to 1987 he represented the Sixth Congressional District of Louisiana in the U.S. House of Representatives. Mr. Moore previously served on the Board of Directors of Domtar Corporation.                                                                                                                                                                                                         |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| In concluding that Mr. Moore should serve as a director, the Board considered the following key competencies: DOE experience; political affairs experience; legal experience; CEO experience; international experience; and public company board experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |

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|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Walter E. Skowronski                                                                                  Director since 2011Age 64                                                                                                                                                                                                                                                                                                                                                                                       |
| Mr. Skowronski retired in 2009 as Senior Vice President of The Boeing Company and President, Boeing Capital Corporation, a wholly owned subsidiary of The Boeing Company, a position he held from 2003 to 2009. Prior to that, Mr. Skowronski was Senior Vice President of Finance and Treasurer of The Boeing Company from 1999 to 2003. Prior to joining Boeing, Mr. Skowronski was Vice President and Treasurer of Lockheed Martin and its predecessor Lockheed Corporation from 1992 to 1999 after joining Lockheed Corporation in 1990.                                                                                                                                                                                                                                                                                                                                                                                                    |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| In concluding that Mr. Skowronski should serve as a director, the Board considered the following key competencies: finance experience, audit committee financial expert; government contracting experience; and business operations experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| M. Richard Smith                                                                                  Director since 2011Age 65                                                                                                                                                                                                                                                                                                                                                                                           |
| Mr. Smith retired in 2007 as Senior Vice President and President of Fossil Power of Bechtel Corporation, a global project execution company. During his 25-year Bechtel career he held other senior positions in engineering, construction and project management including Chief Executive Officer of Intergen and Senior Vice President of USGen, both Bechtel joint ventures, and Executive Vice President of Bechtel Enterprises. Since his retirement Mr. Smith has served as a consultant and director to Sithe Global Power LLC, an international power development company, and Skyfuel Inc., a solar technology company. Mr. Smith also currently serves on the Boards of Directors of Aegion Corporation and of McGrath RentCorp. He previously served on the Board of Directors of Evergreen Energy Inc.                                                                                                                             |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| In concluding that Mr. Smith should serve as a director, the Board considered the following key competencies: senior executive experience; engineering, construction and project management experience; and public company board experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| John K. Welch                                                                                  Director since 2005Age 63                                                                                                                                                                                                                                                                                                                                                                                              |
| Mr. Welch has been President and Chief Executive Officer since October 2005. Prior to joining USEC, he served as a consultant to several government and corporate entities. He was Executive Vice President and Group Executive, Marine Systems at General Dynamics Corporation from March 2002 to March 2003, and Senior Vice President and Group Executive, Marine Systems from January 2000 to March 2002. Prior to that, Mr. Welch held several executive positions over a 10-year period at General Dynamic’s Electric Boat Corporation, including President from 1995 to 2000. Mr. Welch currently serves as Chairman of the Board of Directors of Battelle Memorial Institute and on the Board of Directors of Precision Custom Components Inc.                                                                                                                                                                                    |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| In concluding that Mr. Welch should serve as a director, the Board considered the following key competencies: current service as USEC CEO; other executive experience; nuclear and defense experience; professional engineer experience; and manufacturing experience.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Hiroshi Sakamoto                                                                                  Director since 2010Age 56                                                                                                                                                                                                                                                                                                                                                                                           |
| Mr. Sakamoto has served as Senior Vice President and General Manager, Toshiba Nuclear Energy Holdings (US) Inc., a subsidiary of Toshiba Corporation, since April 2007. Since April 2008, Mr. Sakamoto has also served as Senior Vice President and Board Director, Toshiba America Nuclear Energy Corporation, also a subsidiary of Toshiba Corporation. Mr. Sakamoto joined Toshiba Corporation in April 1981 and has held a variety of positions of increasing responsibility over his career, including Vice President for Nuclear Business Development from April 2003 to September 2009 and Senior Manager for Nuclear Energy Engineering from October 2001 to March 2003 at Toshiba International Corporation, a subsidiary of Toshiba Corporation focusing on the energy business. Mr. Sakamoto has a Bachelors Degree and a Masters Degree in Nuclear Engineering from Kyoto University.                                               |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| George Dudich                                                                                  Director since 2012Age 52                                                                                                                                                                                                                                                                                                                                                                                              |
| Mr. Dudich has served as President of Babcock & Wilcox Technical Services Group, Inc., a subsidiary of The Babcock & Wilcox Company (“B&W”), since November 2011. Previously, he served as Senior Vice President of Business Development and Strategic Planning for B&W, having rejoined B&W in August 2010. Prior to re-joining B&W in August 2010, Mr. Dudich served as Senior Vice President of Business Development for Washington Group beginning in 2004 until URS Corporation acquired Washington Group, at which time he became the Senior Vice President of Business Development for the Global Management and Operations Services group of URS Corporation through July 2010. From 1990 to 1999, Mr. Dudich served in a number of positions of increasing responsibility with B&W, including Vice President of Business Development for a prior subsidiary of B&W, B&W Services, Inc. |

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Item

| ·   | President and Chief Executive Officer (CEO), John K. Welch; |
|--------------------|-------------------------------------------------------------|

| ·   | Senior Vice President and Chief Financial Officer (CFO), John C. Barpoulis; |
|--------------------|-----------------------------------------------------------------------------|

| ·   | Senior Vice President, General Counsel, Chief Compliance Officer and Corporate Secretary, Peter B. Saba; |
|--------------------|----------------------------------------------------------------------------------------------------------|

| ·   | Senior Vice President and Chief Development Officer, Philip G. Sewell; and |
|--------------------|---------------------------------------------------------------------------------|

| ·   | Senior Vice President and Chief Operating Officer, Robert Van Namen. |
|--------------------|----------------------------------------------------------------------|

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| ·   | In May 2012, we executed a five-way arrangement with Energy Northwest, Bonneville Power Administration, the Tennessee Valley Authority and DOE to continue enrichment at the Paducah GDP by re-enriching DOE high assay tails at Paducah through May 2013. This arrangement resulted in a significant gross margin improvement for the year and also enabled us to have additional time to work to put in place a transition plan for Paducah. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | In June 2012, we successfully entered into an agreement with DOE on the ACP RD&D program, which provides for 80% DOE and 20% USEC cost sharing for work performed during the period June 1, 2012 through December 31, 2013 with a total estimated cost of $350 million. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | The RD&D program is incrementally funded, so continued efforts were needed throughout 2012 and continue in 2013 to keep the funding adequate for planned project execution, with additional funding provided in November 2012 and March 2013; and |
|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | The RD&D program is on budget and on schedule and during 2012 we successfully achieved two of the program milestones and are on track to achieving the remaining milestones during 2013. |
|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Throughout 2012, we made significant progress in ACP commercialization initiatives related to: execution of the RD&D program to reduce technical risk, ACP cost and schedule, sales initiatives, balance sheet improvement initiatives and capital resources initiatives. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | In March 2012, we renewed our credit facility and throughout 2012 continued to maintain adequate liquidity and working capital to support ongoing operations and investment in the RD&D program. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | During 2012, we took steps to reduce our costs and align our organization with the current business, including workforce reductions and the elimination of two senior officer positions. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We achieved gross profit for 2012 of $138 million and positive cash flow from operations of $143 million. |
|--------------------|---------------------------------------------------------------------------------------------------------------------|

| ·   | Notwithstanding this positive gross profit, we reported a non-cash charge of approximately $1.1 billion for previously capitalized ACP costs based on our assessment of our ability to recover the full amount of this prior capital investment. This non-cash charge had no effect on current USEC operations, including the RD&D program and its equipment or future investment in ACP. However, this non-cash charge resulted in USEC reporting a net loss of $1.2 billion for 2012 and negative stockholders’ equity. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | In light of all the uncertainties and challenges facing our business, during 2012 we experienced a significant decline in our stock price. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------|

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| ·   | Unrealized value or loss in value of equity awards. |
|--------------------|-----------------------------------------------------|

| o   | Performance-based restricted stock included in the Stock Awards column of the Summary Compensation Table for 2012 was again not earned based on stock price performance and resulted in no value to the NEOs (performance-based restricted stock was also not earned in 2011 as a result of performance). For the CEO, this resulted in $695,250 of reported 2012 performance-based compensation that was not earned in 2012. For all NEOs (including the CEO), it resulted in an aggregate of $1,731,930 of reported 2012 performance-based compensation that was not earned in 2012. |
|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | Awards of restricted stock made in May 2012 at a grant date fair value of $.81 per share lost approximately 35% of their value by December 31, 2012 (the last trading day of the year) because of our declining stock price. Since December 31, 2012, our stock price has declined further. |
|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | Grants of restricted stock made in 2011 and 2010 were made at a grant date fair value of $5.16 and $5.18 per share, respectively. The shares have declined approximately 90% in value. |
|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | In early 2013, the NEOs agreed to the voluntary surrender of all of their outstanding stock options, including options granted in 2010 representing $1,626,601 of compensation included in the Summary Compensation Table for 2010. |
|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | Since the CEO joined the Company in 2005, he has received stock awards with an aggregate grant date fair value of approximately $9 million. The CEO has not sold any of these shares (other than shares withheld at vesting to pay withholding taxes), and so has not realized the value of these equity awards and their value could be further reduced. The aggregate market value of his shares held at December 31, 2012 had declined to $1,043,855. |
|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | We are engaged with advisors and certain stakeholders on alternatives for a possible restructuring of our balance sheet, which could result in dilution or loss in value or no value for the common stock. |
|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Payouts of performance-based compensation tied to performance. |
|--------------------|----------------------------------------------------------------|

| o   | Annual incentives were paid out at 90% of target for the NEOs for 2012 as a result of the achievement of key performance objectives during 2012. |
|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | Quarterly incentives were paid out at 100% of target for the NEOs as a result of the achievement of critical short-term objectives during 2012. |
|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | Awards of performance-based restricted stock in 2012 failed to meet the threshold level of attainment of relative total shareholder return (TSR) and accordingly, there was zero payout. |
|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CEO 2012 realized pay was 75% of pay opportunity. Further declines in USEC’s stock price from $.53 per share as of December 31, 2012 further reduce realized pay. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| About this table:· Pay opportunity is target compensation, before actual performance results are taken into account.· Realizable pay is the actual value of compensation earned, after incentive payouts have been determined and reflective of stock price movements since the date of grant (table includes the market value of restricted stock grants as of December 31, 2012). |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| ·   | Revised the annual incentive program to provide that annual incentive performance goals for 2012 would be comprised entirely of individual performance measures due to the difficulty in establishing corporate quantitative goals for 2012; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Terminated the three-year performance-based cash incentive program under the Company’s 2009 Equity Incentive Plan and replaced it with a performance-based quarterly cash incentive program with increased retentive features for the Company’s NEOs and certain other key employees; and |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Reduced the target value of the restricted stock portion of the long-term incentive program under the Company’s 2009 Equity Incentive Plan and shifted that value to the quarterly cash incentive to make the annualized value of the quarterly cash incentive equal in value to the target annual cash incentive. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The near-term challenges facing the Company in 2012 necessitated the focus on critical near-term business objectives – if these objectives were not met with consistent frequency, the long-term future of the Company would have been significantly adversely affected; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The Company’s strategic transition also made the establishment of longer-term objectives very difficult until there was greater certainty regarding the Company’s strategic path; and |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | In light of the challenges facing the Company during 2012, the quarterly incentive plan provided increased retentive value. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------|

| ·   | Adopted a new performance-based quarterly cash incentive program for 2013 to replace the quarterly cash incentive program that was put in place in 2012; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Suspended the annual incentive program and the long-term incentive program for 2013 and shifted the value to the new quarterly cash incentive program, with a 25% reduction in the target value of the long-term incentive component to take into account the reduced program risk as a result of the shorter performance measurement period and shift from equity-based to cash incentive; also eliminated the potential for the executives to earn an award above target; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Revised the Company’s existing severance arrangements to provide increased retentive features and ensure that they are market competitive without significantly increasing the overall cost of the arrangements, including: |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | The NEOs agreed to revisions to their existing change in control agreements to: (1) reduce the benefit level from two and a half times annual base salary and bonus to two times annual base salary and bonus; (2) eliminate the existing excise tax gross up; and (3) eliminate the additional pension credit; and |
|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| o   | Revised the Company’s existing executive severance plan to temporarily enhance the severance benefit level for the NEOs from one times annual base salary and bonus to two times annual base salary and bonus, with the enhanced benefit levels expiring January 1, 2015. |
|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The NEOs agreed to the cancellation of their existing 2,190,445 unexercised stock options. |
|--------------------|--------------------------------------------------------------------------------------------|

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| ·   | Declines in the value of the Company’s common stock have reduced the incentive and retentive value of additional grants of equity as executives already hold substantial amounts of common stock; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The potential for a restructuring of the Company’s balance sheet further reduces the incentive and retentive value of additional grants of equity to executives; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | At lower stock prices, additional equity grants equivalent to a specified dollar amount of value are increasingly dilutive to existing stockholders; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The Company’s strategic transition necessitated management’s singular focus during 2013 on critical near-term business objectives; and |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The Company’s strategic transition also continued to make the establishment of longer-term objectives very difficult until there is greater certainty regarding the Company’s strategic path. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Our Compensation Committee exercises strong oversight of all elements of executive compensation; |
|--------------------|--------------------------------------------------------------------------------------------------|

| ·   | Base salary in 2012 represented 30% or less of each NEO’s total direct compensation opportunity (22% for the CEO), with the remainder of compensation being variable or “at risk;” |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The Committee uses an independent compensation consultant; |
|--------------------|------------------------------------------------------------|

| ·   | Based on a comprehensive pay-for-performance analysis conducted by the compensation consultant during 2012, the CEO’s realized compensation was below the 25th percentile of the Company’s Peer Group, a result that is within a range of the Company’s performance relative to its Peer Group, as described below under “Pay-for-Performance Assessment;” |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | USEC’s Peer Group was revised during 2012 to remove three larger companies; |
|--------------------|-----------------------------------------------------------------------------------|

| ·   | Our NEOs’ stock ownership in all cases exceeds the stock ownership guidelines; |
|--------------------|--------------------------------------------------------------------------------------|

| ·   | Our insider trading policy includes a “no-hedging” policy that prohibits employees and directors from hedging the economic interest in the USEC shares they hold; |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Our equity incentive plan includes a compensation recovery or “clawback” provision that applies to all equity plan participants, as described below under “Recovery of Incentive Compensation;” |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Our NEOs have only very limited perquisites – including financial planning and executive physicals – which benefit the Company as well as the NEOs; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | There are no employment agreements with NEOs and severance is limited to two times base salary and bonus; |
|--------------------|-----------------------------------------------------------------------------------------------------------|

| ·   | Change in control agreements are “double-trigger” requiring both a change in control and a separation from service within a specified period to receive benefits. These agreements provide for automatic renewal to protect employees; however, we retain the ability to terminate the agreements with sufficient notice; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Excise tax-gross ups have been eliminated from all change in control agreements, effective January 1, 2013; change in control benefits for the NEOs were also reduced from 2.5 times base salary and bonus to 2 times base salary and bonus; and |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | We have a strong risk management program with specific responsibilities assigned to the Board and its committees, and consideration of avoiding excessive risk in compensation decisions. See discussion of the compensation risk assessment performed under “Risk Assessment of Compensation Programs.” |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| Objective                                                                               | How We Implement Our Objectives                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Compensation should be aligned with stockholders’ interests.                      | •Strong incentives to maximize long-term value for our stakeholders.•Long-term stock ownership by executives and performance incentives provide ongoing alignment.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Compensation should support our business strategy and objectives.                       | •Reward successful execution of our business plan by linking performance goals directly to our business plan.•Stretch performance goals encourage innovation by executives while not encouraging excessive risk-taking.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| Compensation should be structured to pay for performance.                               | •A substantial portion of the total compensation opportunity is variable and dependent upon the individual’s and the Company’s performance.•2012 realized compensation was significantly below target opportunity compensation.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Compensation opportunities should be market competitive.                                | •Compensation and benefits programs are designed to provide competitive compensation relative to the labor markets for our executives while maintaining fiscal responsibility for our stockholders.•We use Peer Group proxy data to review market compensation. In 2013 we revised our Peer Group so our revenues are closer to the median of the Peer Group.•Overall base salaries and target total direct opportunity compensation are positioned at approximately the 50th percentile of the market using this data. In addition, by changing the Peer Group, that had the effect of lowering the median target compensation compared.•Current significant challenges facing the Company and talent retention objectives warrant targeting higher levels of compensation for some individuals. |
| Compensation and benefits programs should encourage short-term and long-term retention. | •Our compensation and benefits programs are intended to encourage retention and reward continuity of service, which is particularly important due to the unique skill sets of our executives.•Short-term retention is also important due to the challenges currently facing our business.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |

| ·   | CEO and other NEO pay are set by the independent Compensation Committee (other than base salaries, which are set by the Board upon recommendation by the Compensation Committee). |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CEO and the Vice President of Human Resources provide support to the Compensation Committee and attend all Compensation Committee meetings but are not present for executive sessions or discussions of their individual compensation. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CEO provides performance assessments and compensation recommendations for each of the other NEOs and a self-assessment of his own performance. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CFO attends Compensation Committee meetings as needed to report on financial items. |
|--------------------|-------------------------------------------------------------------------------------|

| ·   | Compensation Committee meetings often include an executive session without members of management present – during 2012 the Compensation Committee met 11 times, including eight times in executive session. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | Albemarle Corp.      |   | Cytec Industries Inc.        |   | Orbital Sciences Corp. |
|--------|----------------------|--------|------------------------------|--------|------------------------|
|   | Arch Chemicals Inc.  |   | Esterline Technologies Corp. |   | Rockwell Collins Inc.  |
|   | Arch Coal Inc.       |   | FMC Corp.                    |   | Rockwood Holdings Inc. |
|   | Cameco Corp.         |   | Goodrich Corp.               |   | Teledyne Technologies  |
|   | CONSOL Energy Inc.   |   | Hexcel Corp.                 |   |                   |
|   | Curtiss-Wright Corp. |   | OM Group                     |   |                   |

| ·   | How our performance compared with the Peer Group using operational and stockholder performance metrics — specifically earnings per share growth, revenue growth, earnings before interest, taxes, depreciation and amortization (EBITDA) growth and return on net assets, and total shareholder return; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | How the potential compensation opportunity for our executives compared with our Peer Group; and |
|--------------------|------------------------------------------------------------------------------------------------------|

| ·   | How the amount of cash compensation our executives earned plus the value of equity compensation as of a specified date as a percentage of (1) their potential (realizable) compensation and (2) our reported net income and average market capitalization compared with our Peer Group. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| Compensation Element                                                                  | Objectives                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | Key Features                                                                                                                                                                                                        |
|---------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Base Salary                                                                           | •Provides a stable annual income at a level consistent with individual contributions.                                                                                                                                                                                                                                                                                                                                                                                                                         | •Adjustments are considered annually (or in the event of change in responsibilities) based on individual performance, level of pay relative to the market, internal pay equity, and retention considerations. |
| Quarterly Cash Incentive Awards                                                       | •Rewards the achievement of critical quarterly performance goals aligned with corporate strategic objectives.•Retains NEOs by providing market-competitive compensation.                                                                                                                                                                                                                                                                                                                                | •Quarterly Performance goals are predetermined and consist of corporate performance goals.                                                                                                                    |
| Annual Cash Incentive Awards*                                                         | •Rewards the achievement of critical annual performance goals aligned with corporate strategic objectives.•Retains NEOs by providing market-competitive compensation.                                                                                                                                                                                                                                                                                                                                   | •Annual incentives can vary from 0% to 150% of the target amount.•Annual performance goals are predetermined and consist of individual performance measures.                                       |
| Long-Term Incentive Awards (restricted stock and performance-based restricted stock)* | •Aligns NEO’s interests with long-term stockholder interests by linking part of each NEO’s compensation to long-term corporate stock performance, as well as rewarding total shareholder return performance.•Provides opportunities for investment in and ownership of the Company, which is designed to promote retention and enable us to attract and motivate our NEOs.•Retains NEOs through multi-year vesting of equity grants and by providing market-competitive compensation. | •Uses time-based and performance-based restricted stock to balance the multiple objectives.•Long-term equity awards generally vest in increments over a three-year period.                              |

| Short-Term vs. Long-TermIncentive Pay Opportunity | Cash vs. Equity-BasedPay Opportunity | Fixed vs. VariablePay Opportunity |
|---------------------------------------------------|--------------------------------------|-----------------------------------|

| Long-Term Incentive – Incentive compensation based on performance of greater than one yearShort-Term Incentive – Incentive compensation based on performance of one year or lessCash – Compensation paid in the form of cash (base salary, annual incentive and quarterly incentive)  | Equity – Restricted stock awards or other equity awards. Equity awards are “at risk”Variable Pay – Compensation that can vary based on Company or individual performance. Variable pay is “at risk”Fixed Pay – Base pay or salary  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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| Name              |   | 2012 Annual Incentive ProgramTarget Award (as a percentage of base salary) |   |   | 2012 Quarterly Incentive Plan Target Award (as a percentage of base salary) |   |   | 2012 Total Long- Term Incentive ProgramTarget Award (as a percentage of base salary) |   |   | Total2012 Incentive Target Award (as a percentage of base salary) |   |
|-------------------|--------|----------------------------------------------------------------------------|--------|--------|-----------------------------------------------------------------------------|--------|--------|--------------------------------------------------------------------------------------|--------|--------|-------------------------------------------------------------------|--------|
| John K. Welch     |   |                                                                       | 100    | %      |                                                                        |   | 100    | %                                                                                    |   |   | 150                                                               | %      |   |   | 350 | % |
| John C. Barpoulis |   |                                                                       | 70     | %      |                                                                        |   | 70     | %                                                                                    |   |   | 110                                                               | %      |   |   | 250 | % |
| Peter B. Saba     |   |                                                                       | 70     | %      |                                                                        |   | 70     | %                                                                                    |   |   | 90                                                                | %      |   |   | 230 | % |
| Philip G. Sewell  |   |                                                                       | 70     | %      |                                                                        |   | 70     | %                                                                                    |   |   | 110                                                               | %      |   |   | 250 | % |
| Robert Van Namen  |   |                                                                       | 70     | %      |                                                                        |   | 70     | %                                                                                    |   |   | 110                                                               | %      |   |   | 250 | % |

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| Key Performance Objective                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   | Difficulty                                                                                                                                                                                                                                                                                                                                                       |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Core Operations.  Manage core operations such that performance in the following areas supports the transition to a solid business foundation subsequent to cessation of enrichment at the Paducah gaseous diffusion plant and expiration of the Russian highly enriched uranium (HEU) Contract: (1) Paducah production (including securing a tails program and extended operations if economically viable), (2) sales of SWU under the transitional supply arrangement (TSA), (3) sales of SWU and delivery optimization under the Russian HEU contract, (4) spent fuel storage/transportation and nuclear business service; and (5) new sales in emerging/non-traditional markets.                                                                                                                                                                         |   | Achievement of initiatives in these five areas involved targeted cost reductions, consummation of an agreement to continue enrichment at the Paducah plant, gross profit margin on Russian HEU contract deliveries, new sales and performance of NAC versus budget that involved substantial effort and initiative.                                              |
| American Centrifuge Project (ACP) Transition.  Execute an effective ACP transition to a platform that will preserve its future value and offer the opportunity to benefit from its commercialization potential. Actions for this purpose will be based on availability of RD&D funding. If funding is available, implement the RD&D program on a cost-shared basis with DOE leading to validation of the ACP technology and technical risk reduction needed to secure financing under DOE’s loan guarantee program. If RD&D funds are not available, execute a stand-alone research and development program (absent RD&D funding) that maintains USEC’s technology rights and advances SWU performance, value engineering, cost reduction and machine reliability. Plan for and implement project demobilization, if necessary. |   | This includes achievement of objectives relating to obtaining RD&D program funding and RD&D program execution and the development of an ACP commercialization plan. Achievement in these areas requires significant effort and initiative.                                                                                                               |
| Transition Business Unit Functions and Re-engineer Corporate Organization structure. Paducah preparation for the turnover to the DOE post-enrichment; address remaining Portsmouth government services issues, including payment of amounts owed to the Company; and assess and implement corporate organization re-engineering to improve business unit performance and corporate overhead structure.                                                                                                                                                                                                                                                                                                                                                                                                                                                                |   | This includes efforts with respect to the transition of the Paducah plant, achieving corporate overhead reductions, pursuing claims for outstanding government services receivables. Due to the number of risks and uncertainties, implementation of a smooth transition plan involves a great deal of strategic planning and substantial effort and initiative. |
| Ensure Sufficient Liquidity and Improve Credit Profile. Ensure that the Company maintains sufficient liquidity to meet company needs and take steps to reduce costs, to reduce liabilities and exposures and to improve the Company’s overall credit profile.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |   | This includes achievement of objectives relating to identified cost reductions, the renewal of our credit facility and the development of plans to address the 2014 maturity of our convertible notes and other key liabilities. Achievement of these objectives involves substantial effort and initiative.                                                     |
| Strategic Alternatives/Define the Future.  Assess strategic alternatives and develop strategic plan for future, including assessment of commercial deployment/expansion of ACP versus deployment of other enrichment technologies and non-enrichment paths. Pursue strategic business alternatives involving partnerships, joint ventures, teaming, consortia, etc. with other enrichers and/or nuclear business entities to enhance stockholder value and provide the opportunity for future business growth.                                                                                                                                                                                                                                                                                                                                              |   | This includes efforts to explore strategic business opportunities and achievement of these objectives involves substantial effort and initiative, including the involvement of third parties.                                                                                                                                                                    |

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| Name              |   | Restricted StockTarget %of base salary |   |   | Performance-Based Restricted StockTarget %of base salary |   |   | Total LTIPTarget %of base salary |   |
|-------------------|--------|----------------------------------------|--------|--------|----------------------------------------------------------|--------|--------|----------------------------------|--------|
| John K. Welch     |   |                                   | 75     | %      |                                                     |   | 75     | %                                |   |   | 150 | % |
| John C. Barpoulis |   |                                   | 50     | %      |                                                     |   | 60     | %                                |   |   | 110 | % |
| Peter B. Saba     |   |                                   | 40     | %      |                                                     |   | 50     | %                                |   |   | 90 | % |
| Philip G. Sewell  |   |                                   | 50     | %      |                                                     |   | 60     | %                                |   |   | 110 | % |
| Robert Van Namen  |   |                                   | 50     | %      |                                                     |   | 60     | %                                |   |   | 110 | % |

| USEC TSR performance versus the Russell 2000 TSR without dividends (percentile) | Level     | Achievement Level |
|---------------------------------------------------------------------------------|-----------|-------------------|
| 75th percentile or higher                                                       | Maximum   | 150%              |
| 50th percentile                                                                 | Target    | 100%              |
| 25th percentile                                                                 | Threshold | 25%               |
| Below 25th percentile                                                           |      | 0%                |

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| First Quarter 2012· Closing of a credit facility to provide adequate liquidity for on-going business operations for at least twelve months. (50%)· Execution of an agreement with DOE that results in the transfer of the equivalent of $44 million in uranium. (50%)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | Second Quarter 2012· Secure the balance of fiscal year 2012 ACP RD&D program funding from DOE. (40%)· Execute agreements for the extension of enrichment at Paducah on a basis projected to provide comparatively positive and incremental cash flow and gross profit to the Company. (40%)· Working with third party advisors, implement first phase of plan to re-align organizational structure and achieve cost reductions to align with future business state. (20%)                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Third Quarter 2012· Implement next stage of cost reductions pursuant to management’s organization action plan, which identifies savings in health and welfare benefits. (15%)· Manage multi party agreement for depleted uranium tails enrichment to ensure all deliveries are on time and within specifications. (25%)· Develop initial Paducah transition, inventory and asset recovery plan for period following expiration of depleted uranium enrichment agreement. (20%)· Meet all required conditions and deliverables under cooperative agreement with DOE for the RD&D program, including establishment of American Centrifuge Demonstration, LLC governance structure and other conditions necessary to obtain authorization to incur costs during the remainder of program budget period 1 (08/01/12 – 11/30/12) and DOE assumption of remainder of tails liability. (25%)· Develop initial American Centrifuge Plant commercialization plan. (15%) | Fourth Quarter 2012· Ensure adequate funding is provided for the RD&D program through the end of calendar year 2012 and obtain funding for Government Fiscal Year 2013 (or ensure sufficient funding is available in a continuing resolution to continue the program). (20%)· Develop a balance sheet restructuring plan with third party advisors. (20%)· Establish Transitional Supply Agreement (“TSA”) delivery logistics for 2013 and the customer(s) sales commitment for the TSA SWU delivered in 2013. (15%)· Successfully execute the RD&D program through the end of 2012 in compliance with the expected requirements of the cooperative agreement with DOE. (20%)· Implement ACP commercialization plan on schedule, including development of an updated project cost and schedule estimate and initial implementation of ACP output sales strategy. (25%) |

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| Name              |   | 2013 QIPPart A Annualized Target Award(as a percentage of base salary) |   |   | 2013 QIPPart B Annualized Target Award(as a percentage of base salary) |   |   | 2013 QIPTotal Annualized Target Award(as a percentage of base salary) |   |
|-------------------|--------|------------------------------------------------------------------------|--------|--------|------------------------------------------------------------------------|--------|--------|-----------------------------------------------------------------------|--------|
| John K. Welch     |   |                                                                   | 100    | %      |                                                                   |   | 187.5  | %                                                                     |   |   | 287.5 | % |
| John C. Barpoulis |   |                                                                   | 70     | %      |                                                                   |   | 135    | %                                                                     |   |   | 205 | % |
| Peter B. Saba     |   |                                                                   | 70     | %      |                                                                   |   | 135    | %                                                                     |   |   | 205 | % |
| Philip G. Sewell  |   |                                                                   | 70     | %      |                                                                   |   | 135    | %                                                                     |   |   | 205 | % |
| Robert Van Namen  |   |                                                                   | 70     | %      |                                                                   |   | 135    | %                                                                     |   |   | 205 | % |

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| Name and Principal Position            | Year  | Salary($)(1)   | Bonus ($)(2) | Stock Awards ($)(3) | Option Awards($)(4)               | Non-Equity Incentive Plan Comp-ensation($)(5) | Change in Pension Value and Non-Qualified Deferred Comp-ensation Earnings($)(6) | All Other Comp-ensation($)(7)                             | Total ($)           |
|----------------------------------------|------------|--------------------------|-------------------|--------------------------|----------------------------------------|-----------------------------------------------|---------------------------------------------------------------------------------|----------------------------------------------------------------|-----------------------------------------------------------------------|
| John K. Welch                          | 2012       | $919,731                 | $0                | $1,390,500               | $      0 | $1,761,300                                    | $1,185,709                                                                      | $  64,876                                            | $5,322,116                                                            |
| President and CEO                      | 2011       | $900,000                 | $0                | $1,236,192               | $      0 | $  858,375                          | $3,427,750                                                                      | $114,561                                                       | $6,536,878                                                            |
|                                   | 2010       | $900,000                 | $0                | $1,575,000               | $675,001                               | $1,164,600                                    | $2,068,430                                                                      | $ 84,510                                                       | $6,467,541                                                            |
|                                   |       |                     |              |                     |                                   |                                          |                                                                            |                                                           |                                                                  |
| John C. Barpoulis                      | 2012       | $449,867                 | $0                | $492,470                 | $      0 | $  595,443                          | $  282,123                                                            | $ 10,000                                                       | $1,829,903                                                            |
| SVP and CFO                            | 2011       | $428,617                 | $0                | $470,298                 | $      0 | $  324,809                          | $  285,581                                                            | $   9,800                                       | $1,519,105                                                            |
|                                   | 2010       | $440,654                 | $0                | $513,602                 | $256,800                               | $  380,941                          | $  193,221                                                            | $  22,405                                            | $1,807,623                                                            |
|                                   |       |                     |              |                     |                                   |                                          |                                                                            |                                                           |                                                                  |
| Peter B. Saba                          | 2012       | $434,683                 | $20,000           | $378,000                 | $      0 | $  558,600                          | $  260,904                                                            | $  10,000                                            | $1,662,187                                                            |
| SVP, General Counsel, Chief Compliance | 2011       | $404,813                 | $35,000           | $357,125                 | $      0 | $  298,428                          | $  171,072                                                            | $    9,800                                 | $1,276,238                                                            |
| Officer and Corporate Secretary        | 2010       | $384,615                 | $0                | $390,002                 | $156,000                               | $  353,262                          | $    57,313                                                 | $    9,800                                 | $1,350,992                                                            |
|                              |       |                     |              |                     |                                   |                                          |                                                                            |                                                           |                                                                  |
| Philip G. Sewell                       | 2012       | $509,227                 | $0                | $532,510                 | $      0 | $  643,855                          | $  313,337                                                            | $          0 | $1,998,929                                                            |
| SVP and Chief Development Officer      | 2011       | $498,923                 | $0                | $516,452                 | $      0 | $  350,761                          | $    72,584                                                 | $          0 | $1,438,720                                                            |
|                                   | 2010       | $487,851                 | $0                | $563,998                 | $282,000                               | $  418,324                          | $            0           | $          0 | $1,752,173                                                            |
|                                   |       |                     |              |                     |                                   |                                          |                                                                            |                                                           |                                                                  |
| Robert Van Namen                       | 2012       | $445,539                 | $0                | $490,600                 | $      0 | $  593,180                          | $   614,444                                                      | $  10,000                                            | $2,153,763                                                            |
| SVP and Chief Operating Officer        | 2011       | $428,000                 | $0                | $470,298                 | $      0 | $  322,113                          | $   501,283                                                      | $    9,800                                 | $1,731,494                                                            |
|                                   | 2010       | $423,154                 | $0                | $513,602                 | $256,800                               | $  380,941                          | $   227,133                                                      | $  17,882                                            | $1,819,512                                                            |

| (1)    | The amounts shown in the Salary column also include amounts paid in a year for unused accrued vacation time.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (2)    | In March 2012 and May 2011, Mr. Saba was awarded a special cash bonus in recognition of his work related to financing for the American Centrifuge project.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (3)    | The amounts shown in the Stock Awards column represents the aggregate grant date fair value of (a) restricted stock awards; and (b) for 2012 and 2011, performance-based restricted stock target awards, computed in accordance with FASB ASC Topic 718. The grant date fair value of the restricted stock awards made during 2012 was equal to the closing price of our stock of $0.81 on the date of grant (May 8, 2012). For 2012, the performance-based restricted stock awards are reported at the target number of shares, and the grant date fair value of such awards was valued at $0.81 per share based on the date of grant (May 8, 2012). The maximum payout for the performance-based restricted stock awards was 150% of target. However, the awards failed to meet the threshold level of attainment of relative total shareholder return (TSR) performance against total shareholder return of the Russell 2000 and accordingly there was zero payout. Amounts included in the Stock Awards column for 2012 that resulted in zero payout were as follows: Mr. Welch: $695,250; Mr. Barpoulis: $268,620; Mr. Saba: $210,000; Mr. Sewell: $290,460; and Mr. Van Namen: $267,600. For a discussion of valuation assumptions, see Note 13 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2012, Note 11 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2011, and Note 13 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2010. |

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|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (4)    | The amounts shown in the Option Awards column represent the aggregate grant date fair value of option awards to the NEOs under the Company’s long-term incentive program, computed in accordance with FASB ASC Topic 718. No options were granted in 2012 or 2011. Option awards were made on March 8, 2010 with a Black-Scholes value of $2.81 per share. For a discussion of valuation assumptions, see Note 13 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2010.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| (5)    | The amounts shown in the Non-Equity Incentive Plan Compensation column include annual incentive awards made to each of the NEOs based on the Compensation Committee’s evaluation of each officer’s performance during the year. The amounts shown for a fiscal year include cash annual incentives earned for that year and paid in the following year. The amount for 2012 includes quarterly incentive awards made to each of the NEOs based on the Compensation Committee’s evaluation of performance against quarterly performance goals during the year. The amounts shown for 2012 include quarterly incentives earned during that year and include amounts paid in February 2013 for fourth quarter 2012 performance. The amount for 2011 includes the amount earned by the NEOs during 2011 under the three-year Strategic Incentive Plan for the performance period January 1, 2011 through December 31, 2013. During 2011, 10% of the target three-year awards were earned based on performance against the two interim performance goals for 2011 under the plan. Actual payment of any awards under the three-year performance plan would not be made until early 2014, subject to the terms of the plan, including a requirement that the NEO continue to be employed on such payment date.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| (6)    | The amounts shown in the Change in Pension Value and Non-Qualified Deferred Compensation earnings column represent the change in the actuarial present value of the NEO’s accumulated benefits under the Employees’ Retirement Plan of USEC Inc., the USEC Inc. Pension Restoration Plan and the USEC Inc. 2006 Supplemental Executive Retirement Plan (or, in the case of Mr. Sewell, the 1999 Supplemental Executive Retirement Plan) at December 31, 2012 as compared to December 31, 2011. Mr. Welch’s benefit under the 2006 SERP is a percentage of his final average compensation. The percentage increased from zero to 30% when he reached five years of service and increased to 40% when he reached seven years of service, and will increase to 50% at ten years of service. However, the figure in the table was calculated as though the benefit accrued ratably between the 7th and 10th years of service in order to smooth the presentation of the figure from year to year. Accordingly, the figure shown somewhat overstates his benefit as of December 31, 2012. The increase from 2011 to 2012 reflects this ratable accrual (for Mr. Welch), an additional year of service for the other NEOs other than Mr. Sewell, a decrease in the lump sum rate from 4.66% to 4.55%, a decrease in the discount rate from 4.95% to 4.07%, and a reduction in the assumed period of time until benefit commencement. The actuarial present value of Mr. Sewell’s accumulated benefits under these plans as of December 31, 2010 decreased by $337,954 as compared to December 31, 2009, reflecting that Mr. Sewell had passed his normal retirement date. None of our plans provide for above-market earnings on deferred compensation amounts, and as a result, the amounts reported here do not reflect any such earnings. |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| (7)    | The amounts shown in the All Other Compensation column for 2012 for Mr. Welch, Mr. Barpoulis, Mr. Saba and Mr. Van Namen include Company matching contributions of $10,000 made under the USEC Savings Program. The amount for Mr. Welch for 2012 also includes (a) a Company matching contribution of $23,535 made under the USEC Inc. Executive Deferred Compensation Plan, as included in the Nonqualified Deferred Compensation in Fiscal Year 2012 table; and (b) $31,341 for perquisites and other personal benefits received in 2012. Perquisites and other personal benefits for Mr. Welch for 2012 included: financial counseling, club membership dues, an annual physical, and spouse travel and related expenses. No one perquisite for Mr. Welch exceeded the greater of $25,000 or 10% of the total amount of these benefits.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |

| Name              |   | Salary |    |   | Bonus  |   |   | Stock Awards |   |   | Non-Equity Incentive Plan Comp. |   |   | Change in Pension Value and Non-qualified Deferred Comp. Earnings |      |   | All Other Comp. |   |      | SEC Total |   |   | SEC Total without Unrealized Equity Awards(1) |   |   | W-2 Realized Comp.(2) |      |
|-------------------|--------|--------|---------|--------|--------|--------|--------|--------------|--------|--------|---------------------------------|--------|--------|-------------------------------------------------------------------|-----------|--------|-----------------|--------|-----------|-----------|--------|--------|-----------------------------------------------|--------|--------|-----------------------|-----------|
| John K. Welch     |   | $      | 919,731 |   |   | $      | 0      |         |   | $      | 1,390,500                       |   |   | $                                                                 | 1,761,300 |   |            | $      | 1,185,709 |      |   | $      | 64,876                                        |   |   | $                     | 5,322,116 |   |   | $ | 4,626,866 |   |   | $ | 2,552,324 |   |
| John C. Barpoulis |   | $      | 449,867 |   |   | $      | 0      |         |   | $      | 492,470                         |   |   | $                                                                 | 595,443   |   |            | $      | 282,123   |      |   | $      | 10,000                                        |   |   | $                     | 1,829,903 |   |   | $ | 1,561,283 |   |   | $ | 1,038,699 |   |
| Peter B. Saba     |   | $      | 434,683 |   |   | $      | 20,000 |         |   | $      | 378,000                         |   |   | $                                                                 | 558,600   |   |            | $      | 260,904   |      |   | $      | 10,000                                        |   |   | $                     | 1,662,187 |   |   | $ | 1,452,187 |   |   | $ | 971,474 |   |
| Philip G. Sewell  |   | $      | 509,227 |   |   | $      | 0      |         |   | $      | 532,510                         |   |   | $                                                                 | 643,855   |   |            | $      | 313,337   |      |   | $      | 0                                             |   |   | $                     | 1,998,929 |   |   | $ | 1,708,469 |   |   | $ | 1,317,790 |   |
| Robert Van Namen  |   | $      | 445,539 |   |   | $      | 0      |         |   | $      | 490,600                         |   |   | $                                                                 | 593,180   |   |            | $      | 614,444   |      |   | $      | 10,000                                        |   |   | $                     | 2,153,763 |   |   | $ | 1,886,163 |   |   | $ | 1,035,778 |   |

| (1) | As described in footnote 3 to the 2012 Summary Compensation Table above, in accordance with SEC rules, the aggregate grant date fair value of target awards of performance-based restricted stock made during 2012, but that resulted in zero payout based on performance, were included in the Stock Awards column. As these awards were not earned, we have included the SEC Total Without Unrealized Equity Awards column to show total compensation for 2012 without these awards. The amounts reported in the SEC Total Without Unrealized Equity Awards column differ substantially from the amounts reported in the SEC Total column required under SEC rules and are not a substitute for total compensation. The SEC Total Without Unrealized Equity Awards column represents total compensation, as determined under applicable SEC rules, minus the awards of performance-based restricted stock reported in the Stock Awards column, because the performance-based restricted stock was not earned. |
|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (2)    | The amounts shown in the W-2 Realized Compensation column shows compensation actually realized by each NEO, as reported on the NEO’s W-2 form for each of the years shown. The amounts reported in the W-2 Realized Compensation column differ substantially from the amounts reported in the SEC Total column required under SEC rules and are not a substitute for total compensation. For 2012, W-2 Realized Compensation represents: (1) total compensation, as determined under applicable SEC rules; minus (2) the aggregate grant date fair value of equity awards (as reported in the Stock Awards column); minus (3) the year-over-year change in pension value (as reflected in the Change in Pension Value and Nonqualified Deferred Compensation Earnings column); minus (4) NEO contributions to the USEC Savings Program and the Executive Deferred Compensation Plan and medical premiums that are deducted from income on a pretax basis; minus (5) Company matching contributions under the USEC Savings Program and the Executive Deferred Compensation Plan (as reflected in the All Other Compensation column); plus (6) the value realized from the vesting of restricted stock before payment of any applicable withholding taxes (as reflected in the Option Exercises and Stock Vested in Fiscal Year 2012 Table); and plus (7) imputed income from Company provided life insurance. In addition, W-2 Realized Compensation reflects any bonus or incentive compensation actually paid in the year shown, whereas total compensation under SEC rules reflects any bonus or incentive compensation earned for the year shown. |

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| Name                   | GrantDate    | Date ofCompen-sationCommitteeAction (ifdifferent) | Estimated Future Payouts Under Non-Equity Incentive Plan Awards(1)(2) | Estimated Future Payouts Under Equity Incentive Plan Awards(3) | All OtherStock Awards:Number of Shares of Stock |            |
|------------------------|--------------|---------------------------------------------------|----------------------------------------------------------------------------|----------------------------------------------------------------|-------------------------------------------------|-----------------|
|                   |
| Grant Date             |
| Fair                   |
| Value of               |
| Stock and              |
| Option                 |
| Threshold              | Target  | Maximum                                           | Threshold                                                                  | Target                                                    | Maximum                                         | Awards(4)  |
| John K. Welch          | 4/25/12      |                                              | $0                                                                         | $   927,000                                     | $1,390,500                                      |            |   |   |   |   |
|                   | 4/13/12      |                                              |                                                                       | $   231,750                                     |                                            |            |   |   |   |   |
|                   | 4/25/12      |                                              |                                                                       | $   231,750                                     |                                            |            |   |   |   |   |
|                   | 7/25/12      |                                              |                                                                       | $   231,750                                     |                                            |            |   |   |   |   |
|                   | 10/24/12     |                                              |                                                                       | $   231,750                                     |                                            |            |   |   |   |   |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            | 214,583         | 858,333 | 1,287,500 |   | $695,250 |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            |            |   |   | 858,333(6) | $695,250 |
| John C. Barpoulis      | 4/25/12      |                                              | $0                                                                         | $   313,390                                     | $   470,085                      |            |   |   |   |   |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            | 82,908          |   331,630 |   497,445 |   | $268,620 |
|                   | 4/13/12      |                                              |                                                                       | $   78,348                                      |                                            |            |   |   |   |   |
|                   | 4/25/12      |                                              |                                                                       | $   78,348                                      |                                            |            |   |   |   |   |
|                   | 7/25/12      |                                              |                                                                       | $   78,348                                      |                                            |            |   |   |   |   |
|                   | 10/24/12     |                                              |                                                                       | $   78,348                                      |                                            |            |   |   |   |   |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            |            |   |   |   276,358(6) | $223,850 |
| Peter B. Saba          | 4/25/12      |                                              | $0                                                                         | $   294,000                                     | $   441,000                      |            |   |   |   |   |
|                   | 4/13/12      |                                              |                                                                       | $   73,500                                      |                                            |            |   |   |   |   |
|                   | 4/25/12      |                                              |                                                                       | $   73,500                                      |                                            |            |   |   |   |   |
|                   | 7/25/12      |                                              |                                                                       | $   73,500                                      |                                            |            |   |   |   |   |
|                   | 10/24/12     |                                              |                                                                       | $   73,500                                      |                                            |            |   |   |   |   |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            | 64,815          |   259,259 |   388,889 |   | $210,000 |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            |            |   |   |   207,407(6) | $168,000 |
| Philip G. Sewell       | 4/25/12      |                                              | $0                                                                         | $   338,870                                     | $   508,305                      |            |   |   |   |   |
|                   | 4/13/12      |                                              |                                                                       | $   84,718                                      |                                            |            |   |   |   |   |
|                   | 4/25/12      |                                              |                                                                       | $   84,718                                      |                                            |            |   |   |   |   |
|                   | 7/25/12      |                                              |                                                                       | $   84,718                                      |                                            |            |   |   |   |   |
|                   | 10/24/12     |                                              |                                                                       | $   84,718                                      |                                            |            |   |   |   |   |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            | 89,648          |   358,593 |   537,890 |   | $290,460 |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            |            |   |   |   298,827(6) | $242,050 |
| Robert Van Namen  | 4/25/12      |                                              | $0                                                                         | $   312,200                                     | $   468,300                      |            |   |   |   |   |
|                   | 4/13/12      |                                              |                                                                       | $   78,050                                      |                                            |            |   |   |   |   |
|                   | 4/25/12      |                                              |                                                                       | $   78,050                                      |                                            |            |   |   |   |   |
|                   | 7/25/12      |                                              |                                                                       | $   78,050                                      |                                            |            |   |   |   |   |
|                   | 10/24/12     |                                              |                                                                       | $   78,050                                      |                                            |            |   |   |   |   |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            | 82,593          |   330,370 |   495,555 |   | $267,600 |
|                   | 5/08/12      | 4/13/12(5)                                        |                                                                       |                                                           |                                            |            |   |   |   275,309(6) | $223,000 |
|                   |         |                                              |                                                                       |                                                           |                                            |            |   |   |   |   |

| (1)    | Amounts shown are estimated future cash payouts for 2012 annual incentives based on performance against 2012 individual performance goals at the threshold (0%), target (100%) and maximum (150%) levels. Actual payouts of 2012 annual incentives were approved by the Compensation Committee in February 2013 and were 90% of target for each of the NEOs. These payouts are shown in the Non-Equity Incentive Plan Compensation column of the Summary Compensation Table.                                                                                                                                                                                                                       |
|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (2)    | Amounts shown are estimated future cash payouts for 2012 quarterly incentives based on performance against quarterly performance goals under the Quarterly Incentive Plan at target (100%) levels. Payouts of 2012 quarterly incentives were approved by the Compensation Committee in April 2012 (quarter ended March 31, 2012), July 2012 (quarter ended June 30, 2012), October 2012 (quarter ended September 30, 2012) and January 2013 (quarter ended December 31, 2012) and were 100% of target for each of the NEOs. These payouts are shown in the Non-Equity Incentive Plan Compensation column of the Summary Compensation Table. |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (3)    | Amounts shown are estimated future payouts of performance-based restricted stock awards based on relative performance during the period January 1, 2012 through December 31, 2012 against total shareholder return of the Russell 2000. NEOs were eligible to receive between 25% (threshold) to 150% (maximum) of their target award based on performance, with performance below threshold (25%) resulting in no award. USEC total shareholder return performance was below threshold, so no awards were earned in 2012.                                                                                                                                                          |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (4)    | The value of the stock awards is based on the fair value of such award on the grant date, computed in accordance with FASB ASC Topic 718.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (5)    | These long-term incentive awards were granted by the Compensation Committee, effective as of a later date following the release of the Company’s financial results for the second quarter of 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| (6)    | Includes shares of restricted stock granted to the NEOs in 2012 under the Company’s long-term incentive program. These shares will vest ratably over three years from the date of grant.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |

----

|                                                                                                                                                                                                                                                                                                                                                                                                                          |            Option Awards                                           |      Stock Awards           |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                                                                                                                                                                                                                                                                                        |                                                                                                   | Market |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | Number of                                                                                                                                                                                                                                                                                                                                   | Number of                                                                                              |   |   | Number of | Value of |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | Securities                                                                                                                                                                                                                                                                                                                                  | Securities                                                                                             |   |   | Shares or | Shares or |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | Underlying                                                                                                                                                                                                                                                                                                                                  | Underlying                                                                                             |   |   | Units of | Units of |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | Unexercised                                                                                                                                                                                                                                                                                                                                 | Unexercised                                                                                            | Option | Option | Stock That | Stock That |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | Options                                                                                                                                                                                                                                                                                                                                     | Options                                                                                                | Exercise | Expiration | Have Not | Have Not |
| Name                                                                                                                                                                                                                                                                                                                                                                                                                          | Exercisable                                                                                                                                                                                                                                                                                                                            | Unexercisable                                                                                     |  Price |  Date |  Vested | Vested   |
| John K. Welch                                                                       | 302,691                                                                                                                                                                                                                                                                                                                                     |                                                                                                   | $  5.86 | 3/03/13 | 1,046,894(1) | $554,854 |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | 372,928                                                                                                                                                                                                                                                                                                                                     |                                                                                                   | $  3.72 | 3/04/14 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   160,143                                                                                                                                                                                                                                                                                                                         | 80,071(2)                                                                                              | $  5.18 | 3/08/15 |   |   |
| John C. Barpoulis                                                                   | 107,623                                                                                                                                                                                                                                                                                                                                     |                                                                                                   | $  5.86 | 3/03/13 | 342,586(3) | $181,571 |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   132,597                                                                                                                                                                                                                                                                                                                         |                                                                                                   | $  3.72 | 3/04/14 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   60,925                                                                                                                                                                                                                                                                                                                          | 30,463(2)                                                                                              | $  5.18 | 3/08/15 |   |   |
| Peter B. Saba                                                                       |   17,492                                                                                                                                                                                                                                                                                                                          |                                                                                                   | $  5.23 | 5/06/13 | 257,698(4) | $136,580 |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   81,768                                                                                                                                                                                                                                                                                                                          |                                                                                                   | $  3.72 | 3/04/14 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   37,011                                                                                                                                                                                                                                                                                                                          |   18,505(2)                                                                                  | $  5.18 | 3/08/15 |   |   |
| Philip G. Sewell                                                                    |   50,000                                                                                                                                                                                                                                                                                                                          |                                                                                                   | $  7.00 | 8/06/13 |   -- | -- |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | 126,457                                                                                                                                                                                                                                                                                                                                     |                                                                                                   | $  5.86 | 3/03/13 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | 155,801                                                                                                                                                                                                                                                                                                                                     |                                                                                                   | $  3.72 | 3/04/14 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   66,904                                                                                                                                                                                                                                                                                                                          |   33,452(2)                                                                                  | $  5.18 | 3/08/15 |   |   |
| Robert Van Namen                                                                    |   18,000                                                                                                                                                                                                                                                                                                                          |                                                                                                   | $  7.00 | 8/06/13 | 341,537(5) | $181,015 |
|                                                                                                                                                                                                                                                                                                                                                                                                                          | 110,314                                                                                                                                                                                                                                                                                                                                     |                                                                                                   | $  5.86 | 3/03/13 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   135,912                                                                                                                                                                                                                                                                                                                         |                                                                                                   | $  3.72 | 3/04/14 |   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                          |   60,925                                                                                                                                                                                                                                                                                                                          |   30,463(2)                                                                                  | $  5.18 | 3/08/15 |   |   |

| (1)    | Shares of restricted stock vest as follows: 43,605 shares with a vesting date of March 1, 2013; 101,352 shares with a vesting date of March 8, 2013; 286,111 shares with a vesting date of May 8, 2013; 43,605 shares with a vesting date of March 1, 2014; 286,111 shares with a vesting date of May 8, 2014; and 286,111 shares with a vesting date of May 8, 2015. |
|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (2)    | Stock options vest at the rate of 33 1/3% per year, with vesting dates of March 8, 2011, March 8, 2012, and March 8, 2013.                                                                                                                                                                                                                                                                               |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (3)    | Shares of restricted stock vest as follows: 16,589 shares with a vesting date of March 1, 2013; 33,051 shares with a vesting date of March 8, 2013; 92,119 shares with a vesting date of May 8, 2013; 16,589 shares with a vesting date of March 1, 2014; 92,119 shares with a vesting date of May 8, 2014; and 92,120 shares with a vesting date of May 8, 2015.     |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (4)    | Shares of restricted stock vest as follows: 12,597 shares with a vesting date of March 1, 2013; 25,097 shares with a vesting date of March 8, 2013; 69,135 shares with a vesting date of May 8, 2013; 12,597 shares with a vesting date of March 1, 2014; 69,136 shares with a vesting date of May 8, 2014; and 69,136 shares with a vesting date of May 8, 2015.     |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| (5)    | Shares of restricted stock vest as follows: 16,589 shares with a vesting date of March 1, 2013; 33,051 shares with a vesting date of March 8, 2013; 91,769 shares with a vesting date of May 8, 2013; 16,589 shares with a vesting date of March 1, 2014; 91,770 shares with a vesting date of May 8, 2014; and 91,770 shares with a vesting date of May 8, 2015.     |

----

| Name                                                                                                                                                                                                                                                                                                                                                                                                                                      |           Option Awards                                    |            Stock Awards                                  |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Number of SharesAcquired on Exercise                                                                                                                                                                                                                                                                                                                                                                                                 | Value Realized on Exercise                                                                                                                                                                                                                                                             | Number of SharesAcquired on Vesting                                                                                                                                                                                                                                             | Value Realized onVesting(1)   |
| John K. Welch                                                                         | —                                                                                                                                                                                                                                                                                     | —                                                                                                                                                                                                                                                                              | 269,956(2) | $359,600(2) |
| John C. Barpoulis                                                                     | —                                                                                                                                                                                                                                                                                     | —                                                                                                                                                                                                                                                                              |   88,351(3) | $ 117,684(3) |
| Peter B. Saba                                                                         | —                                                                                                                                                                                                                                                                                     | —                                                                                                                                                                                                                                                                              |   66,870(4) | $ 89,059(4) |
| Philip G. Sewell                                                                      | —                                                                                                                                                                                                                                                                                     | —                                                                                                                                                                                                                                                                              |   298,827(5) | $ 242,050(5) |
| Robert Van Namen                                                                      | —                                                                                                                                                                                                                                                                                     | —                                                                                                                                                                                                                                                                              |   89,318(6) | $ 119,028(6) |

| (1)    | Amounts reflect the closing market price of the stock on the day the stock vested.                                                                                                                                     |
|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                   |
| (2)    | Includes 86,928 shares withheld from Mr. Welch to satisfy taxes at an aggregate value of $115,794. Mr. Welch has not sold any of the remaining shares he acquired upon vesting of restricted stock during 2012.        |
|   |                                                                                                                                                                                                                   |
| (3)    | Includes 31,754 shares withheld from Mr. Barpoulis to satisfy taxes at an aggregate value of $42,330. Mr. Barpoulis has not sold any of the remaining shares he acquired upon vesting of restricted stock during 2012. |
|   |                                                                                                                                                                                                                   |
| (4)    | Includes 22,064 shares withheld from Mr. Saba to satisfy taxes at an aggregate value of $29,411. Mr. Saba has not sold any of the remaining shares he acquired upon vesting of restricted stock during 2012.           |
|   |                                                                                                                                                                                                                   |
| (5)    | Includes 104,441 shares withheld from Mr. Sewell to satisfy taxes at an aggregate value of $84,597. Mr. Sewell has not sold any of the remaining shares he acquired upon vesting of restricted stock during 2012.      |
|   |                                                                                                                                                                                                                   |
| (6)    | Includes 32,094 shares withheld from Mr. Van Namen to satisfy taxes at an aggregate value of $42,803. Mr. Van Namen has not sold any of the remaining shares he acquired upon vesting of restricted stock during 2012. |

----

| Name                                                                                                                                                                                                                                                                                                                                                                                                        |         Plan Name                         | Number of Years ofCredited Service  | Present Value ofAccumulatedBenefit(1)                                                                | Payments DuringLast Fiscal Year  |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------|----------------------------------------------------------------------------------------------------------------|---------------------------------------|
| John K. Welch                                                                    | Retirement Plan                                                                                                                                                                                           | 7 yrs., 2 mos.                           | $   296,114                                                                                     | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Pension Restoration Plan                                                                                                                                                                                  | 7 yrs., 2 mos.                           | $2,345,634                                                                                                     | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | 2006 SERP                                                                                                                                                                                                 | 7 yrs., 2 mos.                           |                  $8,494,042(2) | $     0      |   |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Total                                                                                                                                                                                                     |                                     | $11,135,790                                                                                                    | $     0      |
| John C. Barpoulis                                                                | Retirement Plan                                                                                                                                                                                           | 7 yrs., 9 mos.                           | $     224,366                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Pension Restoration Plan                                                                                                                                                                                  | 7 yrs., 9 mos.                           | $     501,374                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | 2006 SERP                                                                                                                                                                                                 | 7 yrs., 9 mos.                           | $     331,151                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Total                                                                                                                                                                                                     |                                     | $1,056,891                                                                                                     | $     0      |
| Peter B. Saba                                                                    | Retirement Plan                                                                                                                                                                                           | 4 yrs., 8 mos.                           | $     160,517                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Pension Restoration Plan                                                                                                                                                                                  | 4 yrs., 8 mos.                           | $     264,226                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | 2006 SERP                                                                                                                                                                                                 | 4 yrs., 8 mos.                           | $     142,209                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Total                                                                                                                                                                                                     |                                     | $     566,952                                                                         | $     0      |
| Philip G. Sewell                                                                 | Retirement Plan                                                                                                                                                                                           | 11 yrs., 8 mos.                          | $     492,040                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Pension Restoration Plan                                                                                                                                                                                  | 11 yrs., 8 mos.                          | $1,320,314                                                                                                     | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | 1999 SERP                                                                                                                                                                                                 | 11 yrs., 8 mos.                          | $3,176,426                                                                                                     | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Total                                                                                                                                                                                                     |                                     | $4,988,780                                                                                                     | $     0      |
| Robert Van Namen                                                                 | Retirement Plan                                                                                                                                                                                           | 14 yrs.                                  | $     460,720                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Pension Restoration Plan                                                                                                                                                                                  | 14 yrs.                                  | $1,066,039                                                                                                     | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | 2006 SERP                                                                                                                                                                                                 | 14 yrs.                                  | $     790,024                                                                         | $     0      |
|                                                                                                                                                                                                                                                                                                                                                                                                        | Total                                                                                                                                                                                                     |                                     | $2,316,783                                                                                                     | $     0      |

| (1)    | In determining the present value of each participant’s pension benefit, a 4.07% discount rate is assumed. An assumed interest rate of 4.50% (4.53% for participants who are eligible to receive an immediate lump sum distribution) is used in converting Pension Restoration Plan, 2006 SERP and 1999 SERP annuities into lump sums. The lump sum interest rate is determined at the time of benefit commencement and reflects the unannualized Moody’s Aa index bond yield plus 75 basis points. For purposes of this table, the calculation assumes retirement at the earliest age at which unreduced benefits could be paid, including projected future service for eligibility purposes only.                                                                                                                                                                                            |
|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| (2)    | Mr. Welch’s benefit under the 2006 SERP is a percentage of his final average compensation. The percentage increased from zero to 30% when he reached five years of service and to 40% when he reached seven years of service, and will increase to 50% at ten years of service. However, the figure in the table was calculated as though the benefit accrued ratably between the 7th and 10th years of service in order to smooth the presentation of the figure from year to year. Accordingly, the figure shown somewhat overstates his benefit as of December 31, 2012. The increase in Mr. Welch’s 2006 SERP benefit from 2011 to 2012 reflects this ratable accrual, an additional year of service, a decrease in the lump sum rate from 4.66% to 4.50%, a decrease in the discount rate from 4.95% to 4.07%, and a reduction in the assumed period of time until benefit commencement. |

|   | • | Regular Formula: The monthly benefit under the “Regular Formula” is calculated as 1.2% of final average monthly compensation (as described below) times years and months of credited service plus $110. There are no offsets to this benefit. |
|--------|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | • | Alternate Formula: The monthly benefit under the “Alternate Formula” is calculated as 1.5% of final average monthly compensation (as described below) times years and months of credited service minus 1.5% times actual or projected monthly primary Social Security benefit times years and months of credited service up to 33 1/3 years (up to a maximum of 50% of the actual or projected monthly Social Security benefit). |
|--------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | • | Minimum Formula: The monthly benefit under the “Minimum Formula” is calculated as $5 multiplied by the first ten years and months of credited service, plus $7 multiplied by the next ten years and months of credited service, plus $9 times the years and months of credited service in excess of 20 years, plus 10% (less 1% per year of credited service less than 8) of the final average monthly compensation as calculated under the Regular Formula plus $110. There are no offsets to this benefit. |
|--------|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| Name                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |   | ExecutiveContributionsin Last FY(1) |    |   | RegistrantContributionsin Last FY(2) |   |    | AggregateEarningsin Last FY(3) |   |   | AggregateWithdrawals/Distributions |   |   | AggregateBalanceat Last FYE(4) |    |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------|---------|--------|--------------------------------------|--------|---------|--------------------------------|--------|--------|------------------------------------|--------|--------|--------------------------------|---------|
| John K. Welch                                                                                  |   | $                                   | 58,838  |   |                                 | $      | 23,535  |                           |   | $      | 102,198                            |   |   |                           | — |   |   | $ | 1,053,255 |   |
| John C. Barpoulis                                                                              |   |                                | — |   |                                 |   | — |                           |   |   | —                            |   |   |                           | — |   |   |   | — |   |
| Peter B. Saba                                                                                  |   |                                | — |   |                                 |   | — |                           |   |   | —                            |   |   |                           | — |   |   |   | — |   |
| Philip G. Sewell                                                                               |   |                                | — |   |                                 |   | — |                           |   |   | —                            |   |   |                           | — |   |   |   | — |   |
| Robert Van Namen                                                                               |   |                                | — |   |                                 |   | — |                           |   | $      | 40,052                             |   |   | $                              | 10,866  |   |   | $ | 280,579 |   |

| (1)    | Amount represents executive’s contributions to the Deferred Compensation Plan. For Mr. Welch, the amount represented the deferral of a portion of his 2011 annual incentive award paid in 2012. This amount was included in the Summary Compensation Table in the Non-Equity Incentive Plan Compensation column for 2011. |
|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                            |
| (2)    | Amount represents the Company’s contributions to the Deferred Compensation Plan. These amounts are included in the Summary Compensation Table in the All Other Compensation column.                                                                                                                                       |

----

|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (3)    | Amount represents earnings (losses) on the Deferred Compensation Plan during 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| (4)    | Amount represents the aggregate balance for the NEOs as of December 31, 2012 under the Deferred Compensation Plan. In addition to the amounts for 2012, this column includes the current value of the executive’s contributions to the Deferred Compensation Plan and a predecessor plan previously reported as compensation to the NEOs in the Summary Compensation Table in previous years as follows: Mr. Welch $590,953; and Mr. Van Namen $120,326. In addition to the amounts for 2012, amount includes the Company’s contributions to the Deferred Compensation Plan and a predecessor plan previously reported as compensation in the Summary Compensation Table in previous years as follows: Mr. Welch $222,864; and Mr. Van Namen $94,082. |

| ·   | a prorated share of his current incentive (payable at the end of the performance period based on actual performance) up to the date of termination; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | a lump sum cash severance (the “Lump Sum Cash Severance Benefit”); and |
|--------------------|-----------------------------------------------------------------------------------------|

| ·   | continuation of medical and dental coverage as well as life insurance (“Continuing Severance Benefits”) paid for by the Company for a period of time after termination (the “Severance Period”) (or until he receives similar coverage from a subsequent employer, whichever occurs first) and outplacement assistance services. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | a cash lump sum payment of his unpaid base salary through the date of termination, plus all other amounts to which he was entitled under any of the Company’s compensation or benefit plans under the terms of such plans; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | a cash lump sum payment equal to two and a half times the sum of his annual base salary and bonus (the “Change in Control Lump Sum Benefit”) (the executive’s bonus is generally the average of the three most recent annual incentive bonuses paid to the executive prior to the date of termination); |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | continuation of life, accident and health insurance benefits (“Continuing Change in Control Benefits”) for him and his dependents for two and a half years following such termination of employment (the “Covered Period”) or, if sooner, until he is covered by comparable programs of a subsequent employer; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | two and a half additional years of service for purposes of retirement plan benefits under the SERPs (the “Additional Pension Credit”); and |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | if the executive receives payments, whether or not under his or her agreement that would subject him to any federal excise tax due under Section 4999 of the Internal Revenue Code, either his severance payments would be reduced so as not to trigger the excise tax or, if it would produce a larger net benefit, the executive will receive a cash payment equal to the amount of the excise tax, which would partially reimburse the executive for the amount of the tax (an “Excise Tax Gross-Up”). |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

| Executive Benefits and Payments Upon Termination                                                                                                                                                                                                                                                                                        |   | VoluntaryTermination |       |   | Retirement (1) |   |      | InvoluntaryNot for CauseTermination |   |   | InvoluntaryFor CauseTermination |   |   | Involuntary or Good Reason Termination(Change in Control) |      |   | Death orDisability |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------|------------|--------|----------------|--------|-----------|-------------------------------------|--------|--------|---------------------------------|--------|--------|-----------------------------------------------------------|-----------|--------|--------------------|--------|
| John K. Welch                                                                                                                                                                                                                                                                                                                           |   |                 |       |   |           |   |      |                                |   |   |                            |   |   |                                                      |      |   |               |   |
| Severance Payments(2)                                                         |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 1,692,825                       |   |   | $                                                         | 0         |   |               | $      | 4,232,063 |   |   | $ | 0 |   |
| Equity Awards                                                                 |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 554,854                         |   |   | $                                                         | 0         |   |               | $      | 554,854 |   |   | $ | 554,854 |   |
| Retirement Plan(3)                                                            |   | $                    | 285,489    |   |           |   | N/A       |                                |   | $      | 285,489                         |   |   | $                                                         | 285,489   |   |               | $      | 285,489 |   |   | $ | 134,962 |   |
| Pension Restoration Plan(3)                                                   |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| 2006 SERP(4)                                                                  |   | $                    | 10,564,353 |   |           |   | N/A       |                                |   | $      | 10,564,353                      |   |   | $                                                         | 0         |   |               | $      | 10,564,353 | (8) |   | $ | 10,777,194 |   |
| 280G Tax Gross-up                                                             |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Continuing Benefits(5)                                                        |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 47,056                          |   |   | $                                                         | 0         |   |               | $      | 117,640 |   |   | $ | 0 |   |
| Total                                                                         |   | $                    | 10,849,842 |   |           |   |      |                                |   | $      | 13,144,577                      |   |   | $                                                         | 285,489   |   |               | $      | 15,754,399 |   |   | $ | 11,467,010 |   |
| John C. Barpoulis                                                                                                                                                                                                                                                                                                                       |   |                 |       |   |           |   |      |                                |   |   |                            |   |   |                                                      |      |   |               |   |   |   |   |   |   |   |
| Severance Payments(2)                                                         |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 750,277                         |   |   | $                                                         | 0         |   |               | $      | 1,875,692 |   |   | $ | 0 |   |
| Equity Awards                                                                 |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 181,571                         |   |   | $                                                         | 0         |   |               | $      | 181,571 |   |   | $ | 181,571 |   |
| Retirement Plan(3)                                                            |   | $                    | 87,893     |   |           |   | N/A       |                                |   | $      | 87,893                          |   |   | $                                                         | 87,893    |   |               | $      | 87,893 |   |   | $ | 40,536 |   |
| Pension Restoration Plan(3)                                                   |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| 2006 SERP(4)                                                                  |   | $                    | 803,679    |   |           |   | N/A       |                                |   | $      | 803,679                         |   |   | $                                                         | 0         |   |               | $      | 1,142,577 | (8) |   | $ | 767,001 |   |
| 280G Tax Gross-up                                                             |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Continuing Benefits(5)                                                        |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 36,012                          |   |   | $                                                         | 0         |   |               | $      | 90,030 |   |   | $ | 0 |   |
| Total                                                                         |   | $                    | 891,572    |   |           |   |      |                                |   | $      | 1,859,432                       |   |   | $                                                         | 87,893    |   |               | $      | 3,377,763 |   |   | $ | 989,108 |   |
| Peter B. Saba                                                                                                                                                                                                                                                                                                                           |   |                 |       |   |           |   |      |                                |   |   |                            |   |   |                                                      |      |   |               |   |   |   |   |   |   |   |
| Severance Payments(2)                                                         |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 711,264                         |   |   | $                                                         | 0         |   |               | $      | 1,778,160 |   |   | $ | 0 |   |
| Equity Awards                                                                 |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 136,580                         |   |   | $                                                         | 0         |   |               | $      | 136,580 |   |   | $ | 136,580 |   |
| Retirement Plan(3)                                                            |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Pension Restoration Plan(3)                                                   |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| 2006 SERP(4)                                                                  |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 840,556 | (8) |   | $ | 782,508 |   |
| 280G Tax Gross-up                                                             |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Continuing Benefits(5)                                                        |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 35,444                          |   |   | $                                                         | 0         |   |               | $      | 88,610 |   |   | $ | 0 |   |
| Total                                                                         |   | $                    | 0          |   |           |   |      |                                |   | $      | 883,288                         |   |   | $                                                         | 0         |   |               | $      | 2,843,906 |   |   | $ | 919,088 |   |
| Philip G. Sewell                                                                                                                                                                                                                                                                                                                        |   |                 |       |   |           |   |      |                                |   |   |                            |   |   |                                                      |      |   |               |   |   |   |   |   |   |   |
| Severance Payments(2)                                                         |   | $                    | 0          |   |           | $      | 0         |                                |   | $      | 788,480                         |   |   | $                                                         | 0         |   |               | $      | 1,971,200 |   |   | $ | 0 |   |
| Equity Awards                                                                 |   | $                    | 0          |   |           | $      | 0         |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Retirement Plan(3)                                                            |   | $                    | 492,040    |   |           | $      | 492,040   |                                |   | $      | 492,040                         |   |   | $                                                         | 492,040   |   |               | $      | 492,040 |   |   | $ | 255,254 | (7) |
| Pension Restoration Plan(3)                                                   |   | $                    | 1,320,314  |   |           | $      | 1,320,314 |                                |   | $      | 1,320,314                       |   |   | $                                                         | 1,320,314 |   |               | $      | 1,320,314 |   |   | $ | 1,233,390 | (7) |
| 1999 SERP(6)                                                                  |   | $                    | 3,176,426  |   |           | $      | 3,176,426 |                                |   | $      | 3,176,426                       |   |   | $                                                         | 0         |   |               | $      | 3,176,426 | (8) |   | $ | 1,647,825 |   |
| 280G Tax Gross-up                                                             |   | $                    | 0          |   |           | $      | 0         |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Continuing Benefits(5)                                                        |   | $                    | 0          |   |           | $      | 0         |                                |   | $      | 32,656                          |   |   | $                                                         | 0         |   |               | $      | 81,640 |   |   | $ | 0 |   |
| Total                                                                         |   | $                    | 4,988,780  |   |           | $      | 4,988,780 |                                |   | $      | 5,809,916                       |   |   | $                                                         | 1,812,354 |   |               | $      | 7,041,620 |   |   | $ | 3,136,469 |   |
| Robert Van Namen                                                                                                                                                                                                                                                                                                                        |   |                 |       |   |           |   |      |                                |   |   |                            |   |   |                                                      |      |   |               |   |   |   |   |   |   |   |
| Severance Payments(2)                                                         |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 760,021                         |   |   | $                                                         | 0         |   |               | $      | 1,900,052 |   |   | $ | 0 |   |
| Equity Awards                                                                 |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 181,015                         |   |   | $                                                         | 0         |   |               | $      | 181,015 |   |   | $ | 181,015 |   |
| Retirement Plan(3)                                                            |   | $                    | 423,652    |   |           | $      | 423,652   |                                |   | $      | 423,652                         |   |   | $                                                         | 423,652   |   |               | $      | 423,652 |   |   | $ | 216,579 | (7) |
| Pension Restoration Plan(3)                                                   |   | $                    | 149,296    |   |           | $      | 149,296   |                                |   | $      | 149,296                         |   |   | $                                                         | 149,296   |   |               | $      | 149,296 |   |   | $ | 75,721 | (7) |
| 2006 SERP(4)                                                                  |   | $                    | 1,548,701  |   |           |   | N/A       |                                |   | $      | 1,548,701                       |   |   | $                                                         | 0         |   |               | $      | 1,937,063 | (8) |   | $ | 1,509,517 |   |
| 280G Tax Gross-up                                                             |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 0                               |   |   | $                                                         | 0         |   |               | $      | 0 |   |   | $ | 0 |   |
| Continuing Benefits(5)                                                        |   | $                    | 0          |   |           |   | N/A       |                                |   | $      | 38,786                          |   |   | $                                                         | 0         |   |               | $      | 96,965 |   |   | $ | 0 |   |
| Total                                                                         |   | $                    | 2,121,649  |   |           | $      | 572,948   |                                |   | $      | 3,101,471                       |   |   | $                                                         | 572,948   |   |               | $      | 4,688,043 |   |   | $ | 1,982,832 |   |

| (1)    | As of December 31, 2012, Mr. Sewell is eligible for normal retirement in the Retirement Plan, the Pension Restoration Plan and the 1999 SERP. No other NEO is eligible for an early or normal retirement under any of the Company’s retirement programs as of December 31, 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| (2)    | In calculating the Severance Payment, the final average bonuses for the NEOs do not include each executive’s 2012 annual incentive bonus because annual incentive bonuses for 2012 had not been determined or paid as of December 31, 2012. The final average bonuses for the NEOs were based on the average of any bonuses paid for 2011, 2010 and 2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| (3)    | Mr. Barpoulis, Mr. Sewell, Mr. Van Namen and Mr. Welch are vested under the Retirement Plan and the Pension Restoration Plan as of December 31, 2012. Mr. Barpoulis (age 48 at December 31, 2012) is not yet eligible for retirement but will be eligible to commence a reduced pension at age 50. Mr. Sewell (age 66 as of December 31, 2012) is eligible for normal retirement and would commence an immediate unreduced benefit upon termination. Mr. Van Namen (age 51 as of December 31, 2012) is not yet eligible for retirement but is eligible for immediate commencement of benefits accrued prior to 2001, payable as a lump sum. Mr. Van Namen is eligible to commence a reduced pension for benefits accrued after 2000. Mr. Welch (age 62 as of December 31, 2012) is eligible to commence an immediate, reduced pension, payable as an annuity. Amounts shown are the actuarial present value of annuity payments and lump sums, as applicable. The present value of accumulated benefits is calculated using the assumptions under FASB ASC Topic 715-30 as shown in Note 12 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2012. |

----

|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (4)    | Mr. Welch, Mr. Barpoulis and Mr. Van Namen are the only NEOs vested under the 2006 SERP. Accrued SERP benefits are forfeited upon a termination for cause. Mr. Welch is eligible for immediate lump sum benefits. Mr. Barpoulis and Mr. Van Namen are ineligible to commence payment so their amounts represent the present value of an age 55 lump sum payment. Lump sum death benefits are payable immediately. The 2006 SERP provides for a minimum benefit objective of 10% of final average pay (20% in the case of Mr. Welch) in the case of a change in control or death or disability. Amounts for all executives represent the present value of accrued benefits payable in lump sum form. The present value of accumulated benefits is calculated using the assumptions under FASB ASC Topic 715-30 as shown in Note 12 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| (5)    | Includes (a) the cost of continuation of medical, dental and life insurance benefits for a period of one year following termination of employment in the case of an involuntary not for cause termination; and (b) the cost of continuation of medical, dental, life insurance and disability benefits for a period of 2.5 years following termination of employment in the case of a change in control. Amounts vary by executive based on their specific benefit elections.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| (6)    | Mr. Sewell is the only NEO with benefits under the 1999 SERP. Mr. Sewell is eligible to commence an immediate, unreduced benefit upon termination. Benefits accrued prior to 2005 are payable in the form of an annuity and post-2004 benefits are payable as a lump sum. Accrued 1999 SERP benefits are forfeited upon a termination for cause. The amount shown is the actuarial present value of life annuity and lump sum payments. Death benefits are 50% of Mr. Sewell’s pre-2005 accrued benefit and 100% of his post-2004 accrued benefit, with survivor benefits payable as an annuity. In the case of disability, Mr. Sewell would retire and so his amounts under the 1999 SERP would be the same as shown for Mr. Sewell in the column “Retirement.” The present value of accumulated benefits is calculated using the assumptions under FASB ASC Topic 715-30 as shown in Note 12 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| (7)    | In the case of death, Mr. Welch’s, Mr. Barpoulis’, Mr. Sewell’s and Mr. Van Namen’s beneficiaries would be entitled to survivor annuity benefits under the Retirement Plan and the Pension Restoration Plan. Mr. Welch’s, Mr. Sewell’s and Mr. Van Namen’s beneficiaries would be eligible to commence survivor benefits immediately and Mr. Barpoulis’ beneficiary’s survivor benefit would commence on the date he would have reached age 50. Mr. Welch’s and Mr. Barpoulis’ survivor’s benefit is the 50% survivor portion of a joint and survivor annuity and is reduced for early commencement. Mr. Sewell’s survivor benefit is 50% of the amount Mr. Sewell would receive in the form of a single life annuity. Mr. Van Namen’s survivor’s benefit is 50% of the amount Mr. Van Namen would receive in the form of a single life annuity and is reduced for early commencement, subject to a minimum survivor benefit of 25%. Benefits accrued and vested after December 31, 2004 in the Pension Restoration Plan are payable as a lump sum. In the case of disability, each of the executives (except Mr. Sewell) would continue to accrue service during periods of disability rather than commence a retirement benefit. Since Mr. Sewell is eligible for normal retirement, in the case of disability, he would not continue to accrue service but would retire and so his amounts under the Retirement Plan and Pension Restoration Plan would be the same as what is included for Mr. Sewell in the column “Retirement.” |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| (8)    | Change in control agreements as of December 31, 2012 provided for an additional 2.5 years of service for vesting, eligibility and benefit accrual for the executive’s retirement benefits. This is provided through the executive’s SERP benefit and accordingly, amount reflects gross benefit with 2.5 year service enhancement, less vested accrued benefits under the Retirement Plan and the Pension Restoration Plan. This additional pension credit was eliminated, effective January 1, 2013.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |

----

| ·   | Replaced the restricted stock unit portion of the annual retainer (which consisted of an annual grant of restricted stock units with a value of $120,000) with a fixed annual grant of 25,000 restricted stock units (which had a grant date fair value of $20,250 based on a closing price of USEC stock on the date of grant of $0.81 per share); and |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Cash fees are payable in four equal installments per year (rather than in a lump sum at the beginning of the term). |
|--------------------|---------------------------------------------------------------------------------------------------------------------|

| Name                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   | Fees Earned orPaid in Cash (1) |    |   | StockAwards(2)(3) |   |   | Total  |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------------------|---------|--------|-------------------|--------|--------|--------|--------|
| James R. Mellor                                                                                                                     |   | $                              | 135,000 |   |              | $      | 20,250 |   |   | $ | 155,250 |   |
| Joyce F. Brown(4)                                                                                                                   |   | $                              | 20,000  |   |              | $      | 20,250 |   |   | $ | 40,250 |   |
| Sigmund L. Cornelius                                                                                                                |   | $                              | 60,000  |   |              | $      | 20,250 |   |   | $ | 80,250 |   |
| Joseph T. Doyle                                                                                                                     |   | $                              | 75,000  |   |              | $      | 20,250 |   |   | $ | 95,250 |   |
| H. William Habermeyer                                                                                                               |   | $                              | 65,625  |   |              | $      | 20,250 |   |   | $ | 85,875 |   |
| William J. Madia                                                                                                                    |   | $                              | 65,625  |   |              | $      | 20,250 |   |   | $ | 85,875 |   |
| W. Henson Moore                                                                                                                     |   | $                              | 65,625  |   |              | $      | 20,250 |   |   | $ | 85,875 |   |
| Walter E. Skowronski                                                                                                                |   | $                              | 60,000  |   |              | $      | 20,250 |   |   | $ | 80,250 |   |
| M. Richard Smith                                                                                                                    |   | $                              | 67,500  |   |              | $      | 20,250 |   |   | $ | 87,750 |   |

| (1) | The amounts shown in the Fees Earned or Paid in Cash column include the following: |
|-----|------------------------------------------------------------------------------------|

| ·   | Annual Retainers: Cash paid in 2012 for first three quarterly installments of $80,000 cash retainer for the 2012–2013 term. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------|

| ·   | Chairman’s Fees: Cash paid in 2012 for first three quarterly installments of cash retainers to Mr. Doyle ($20,000), Mr. Habermeyer ($7,500), Dr. Madia ($7,500), Mr. Moore ($7,500) and Mr. Smith ($10,000) for annual committee chairman’s fees for the 2012–2013 term. Also includes cash paid in 2012 to Mr. Mellor for first three quarterly installments of his annual chairman’s fee of $100,000 for the 2012–2013 term. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| (2) | The amounts shown in the Stock Awards column represent the aggregate grant date fair value of stock awards to directors in 2012, computed in accordance with Financial Accounting Standards Board (“FASB”) Auditing Standards Codification (“ASC”) Topic 718 (Compensation – Stock Compensation). For a discussion of valuation assumptions, see Note 13 to our consolidated financial statements included in our Form 10-K for the year ended December 31, 2012. In accordance with SEC rules, the amounts shown exclude the impact of estimated forfeitures related to service-based vesting conditions. |
|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Name                  | Grant Date |   | Number ofRestrictedStock Units |   |   | Grant DateFair Value |   |
|-----------------------|------------|--------|--------------------------------|--------|--------|----------------------|--------|
| James R. Mellor       | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| Joyce F. Brown        | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| Sigmund L. Cornelius  | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| Joseph T. Doyle       | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| H. William Habermeyer | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| William J. Madia      | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| W. Henson Moore       | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| Walter E. Skowronski  | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |
| M. Richard Smith      | 05/08/12   |   |                           | 25,000 |   |                 | $      | 20,250 |   |

| Name                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |   | Number ofShares ofRestricted Stock or Restricted Stock Units |    |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------------------------------------------------|---------|
| James R. Mellor                                                                                                                                            |   |                                                         | 287,768 |   |
| Sigmund L. Cornelius                                                                                                                                       |   |                                                         | 54,846  |   |
| Joseph T. Doyle                                                                                                                                            |   |                                                         | 226,435 |   |
| H. William Habermeyer                                                                                                                                      |   |                                                         | 130,586 |   |
| William J. Madia                                                                                                                                           |   |                                                         | 155,350 |   |
| W. Henson Moore                                                                                                                                            |   |                                                         | 168,859 |   |
| Walter E. Skowronski                                                                                                                                       |   |                                                         | 54,846  |   |
| M. Richard Smith                                                                                                                                           |   |                                                         | 57,531  |   |

| (3) | No stock option grants were made to directors in 2012. The following table shows the number of stock options held by each non-employee director as of December 31, 2012, all of which are immediately exercisable: |
|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| Name                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |   | Number of SecuritiesUnderlyingUnexercised Options |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------------------------------|--------|
| James R. Mellor                                                                                                                                       |   |                                              | 11,833 |   |
| Joseph T. Doyle                                                                                                                                       |   |                                              | 1,227  |   |
| W. Henson Moore                                                                                                                                       |   |                                              | 10,500 |   |

Item

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| Name of Beneficial Owner                                     |   | Amountand Nature of BeneficialOwnership(1) |      |   | Percentof Class |   |
|--------------------------------------------------------------|--------|--------------------------------------------|-----------|--------|-----------------|--------|
| John C. Barpoulis                                            |   |                                       | 561,684   |   |            |   | * |   |
| Sigmund L. Cornelius                                         |   |                                       | 54,846    |   |            |   | * |   |
| Joseph T. Doyle                                              |   |                                       | 256,213   |   |            |   | * |   |
| George Dudich                                                |   |                                       | —   |   |            |   | * |   |
| H. William Habermeyer                                        |   |                                       | 140,586   |   |            |   | * |   |
| William J. Madia                                             |   |                                       | 155,350   |   |            |   | * |   |
| James R. Mellor                                              |   |                                       | 473,355   |   |            |   | * |   |
| W. Henson Moore                                              |   |                                       | 179,359   |   |            |   | * |   |
| Peter B. Saba                                                |   |                                       | 375,159   |   |            |   | * |   |
| Hiroshi Sakamoto                                             |   |                                       | —   |   |            |   | * |   |
| Philip G. Sewell                                             |   |                                       | 523,953   |   |            |   | * |   |
| Walter E. Skowronski                                         |   |                                       | 54,846    |   |            |   | * |   |
| M. Richard Smith                                             |   |                                       | 57,531    |   |            |   | * |   |
| Robert Van Namen                                             |   |                                       | 542,034   |   |            |   | * |   |
| John K. Welch                                                |   |                                       | 1,900,392 |   |            |   | 1.5 | % |
| Directors and all executive officers as a group (23 persons) |   |                                       | 6,079,786 | (2)    |            |   | 4.9 | % |

| *      | Less than 1%                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| (1)    | Includes shares subject to options granted pursuant to the USEC Inc. 2009 Equity Incentive Plan (or its predecessor plan, the USEC Inc. 1999 Equity Incentive Plan) exercisable, as of April 29, 2013, or within 60 days from such date as follows: Mr. Doyle 1,227; Mr. Mellor 11,833; and Mr. Moore 10,500. Also includes restricted stock units that can be converted into USEC common stock within 60 days from April 29, 2013 as follows: Mr. Cornelius 54,846; Mr. Doyle 224,986; Mr. Habermeyer 130,586; Dr. Madia 155,350; Mr. Mellor 195,991; Mr. Moore 136,935; Mr. Skowronski 54,846; and Mr. Smith 57,531. |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| (2)    | Includes 23,560 shares subject to options granted pursuant to the USEC Inc. 2009 Equity Incentive Plan (or its predecessor plan, the USEC Inc. 1999 Equity Incentive Plan) exercisable as of April 29, 2013, or within 60 days from such date. Includes 1,011,071 restricted stock units that can be converted into USEC common stock within 60 days from April 29, 2013.                                                                                                                                                                                                                                                                                 |

| Name and Address of Beneficial Owner |   | Amount and Nature of Beneficial Ownership |      |   | Percent ofClass Owned |   |
|--------------------------------------|--------|-------------------------------------------|-----------|--------|-----------------------|--------|
| Dimensional Fund Advisors LP         |   |                                      | 7,633,804 | (1)    |                  |   | 6.15 | % |
| 6300 Bee Cave Road                   |   |                                      |      |   |                  |   |   |   |
| Austin, Texas 78746                  |   |                                      |      |   |                  |   |   |   |
| Global X Management Company LLC.     |   |                                      | 7,594,240 | (2)    |                  |   | 6.12 | % |
| 623 Fifth Avenue, 15th Floor         |   |                                      |      |   |                  |   |   |   |
| New York, New York 10022             |   |                                      |      |   |                  |   |   |   |
| Van Eck Associates Corporation.      |   |                                      | 6,952,042 | (3)    |                  |   | 5.60 | % |
| 335 Madison Avenue, 19th Floor       |   |                                      |      |   |                  |   |   |   |
| New York, New York 10017             |   |                                      |      |   |                  |   |   |   |

|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (1)    | The Schedule 13G/A filed on February 11, 2013 with the SEC by Dimensional Fund Advisors LP states that it has sole power to vote 7,467,839 shares and sole power to dispose 7,633,804 shares. Dimensional Fund Advisors states in its Schedule 13G/A that all securities reported therein are owned by its funds, no one of which, to its knowledge, owns more than 5% of the class of securities. In its Schedule 13G/A, Dimensional Fund Advisors disclaims beneficial ownership of all such securities. |
|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| (2)    | The Schedule 13G filed on February 13, 2013 with the SEC by Global X Management Company LLC states that they have the sole power to vote and dispose of 7,594,240 shares. The Schedule 13G states that Global X Uranium ETF has the right to receive dividends from, and the proceeds from the sale of the shares reported by Global X Management Company LLC.                                                                                                                                                  |

----

|   |                                                                                                                                                                                                                                                                                                                                                                                                          |
|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (3)    | The Schedule 13G filed on February 14, 2013 with the SEC by Van Eck Associates Corporation states that they have the sole power to vote and dispose of 6,952,042 shares. The Schedule 13G states that the shares are held within mutual funds and other client accounts managed by Van Eck Associates Corporation, one of which individually owns more than 5% of the outstanding shares. |
|   |                                                                                                                                                                                                                                                                                                                                                                                                          |

| Plan category                                              |   | Number of securities to be issued upon exercise of outstanding options, warrants and rights |      |   | Weighted-averageexercise price ofoutstandingoptions, warrantsand rights |   |   | Number of securitiesremaining availablefor future issuanceunder equitycompensation plans |   |
|------------------------------------------------------------|--------|---------------------------------------------------------------------------------------------|-----------|--------|-------------------------------------------------------------------------|--------|--------|------------------------------------------------------------------------------------------|--------|
| Equity compensation plans approved by security holders     |   |                                                                                        | 2,778,108 |   |                                                                    | $      | 4.95   |                                                                                     |   |   | 2,829,800 | (1) |
| Equity compensation plans not approved by security holders |   |                                                                                        | -         |   |                                                                    |   | -      |                                                                                     |   |   | - |   |
| Total                                                      |   |                                                                                        | 2,778,108 |   |                                                                    |   |   |                                                                                     |   |   | 2,829,800 |   |

| (1) | Includes approximately 2,829,800 shares with respect to which awards are available for issuance under the USEC Inc. 2009 Equity Incentive Plan (net of awards which terminate or are cancelled without being exercised or that are settled for cash). |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

Item

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Item

| Type of Fee           |   | Amount BilledFor Year EndedDecember 31, 2012 |   |   | Amount BilledFor Year EndedDecember 31, 2011 |   |
|-----------------------|--------|---------------------------------------------------|--------|--------|---------------------------------------------------|--------|
|                  |   | (In thousands)                                    |   |   | (In thousands)                                    |   |
| Audit Fees(1)         |   | $                                                 | 1,127  |   |                                              | $      | 1,033 |   |
| Audit-Related Fees(2) |   | $                                                 | 15     |   |                                              | $      | 85 |   |
| Tax Fees(3)           |   | $                                                 | 74     |   |                                              | $      | 150 |   |
| All Other Fees(4)     |   | $                                                 | 4      |   |                                              | $      | 2 |   |
| Total                 |   | $                                                 | 1,220  |   |                                              | $      | 1,270 |   |

| (1)    | Primarily audits of the financial statements for both periods including internal control testing over financial reporting and reviews of quarterly financial statements for both periods. |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |                                                                                                                                                                                      |
| (2)    | Fraud risk assessment in both periods, internal audit plan benchmarking and risk assessment in 2011, and Form S-3 registration statement in 2011.                                         |
|   |                                                                                                                                                                                      |
| (3)    | Primarily services related to selected tax projects and IRS audit assistance for both periods.                                                                                            |
|   |                                                                                                                                                                                      |
| (4)    | Service fee for access to electronic publication.                                                                                                                                         |

Item

|   | (3) Exhibits |
|--------|--------------|

|   | The exhibits listed on the accompanying Exhibit Index are filed as part of this report and such Exhibit Index is incorporated herein by reference. |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | SIGNATURES |
|--------|------------|

| Signature                                             | Title                                                                           | Date                       |
|------------------------------------------------------------|---------------------------------------------------------------------------------|----------------------------|
| /s/ John K. WelchJohn K. Welch                             | President and Chief Executive Officer(Principal Executive Officer) and Director | April 30, 2013   |
| /s/ John C. BarpoulisJohn C. Barpoulis                     | Senior Vice President and Chief Financial Officer (Principal Financial Officer) | April 30, 2013   |
| /s/ J. Tracy MeyJ. Tracy Mey                               | Vice President and Chief Accounting Officer (Principal Accounting Officer)      | April 30, 2013   |
| /s/ James R. MellorJames R. Mellor                    | Chairman of the Board and Director                                              | April 30, 2013             |
| /s/ Sigmund L. CorneliusSigmund L. Cornelius          | Director                                                                        | April 30, 2013   |
| /s/ Joseph T. DoyleJoseph T. Doyle                    | Director                                                                        | April 30, 2013   |
| /s/ George DudichGeorge Dudich                        | Director                                                                        | April 30, 2013   |
|  /s/ H. William HabermeyerH. William Habermeyer  | Director                                                                        | April 30, 2013   |
| /s/ William J. MadiaWilliam J. Madia                  | Director                                                                        | April 30, 2013   |
| /s/ W. Henson MooreW. Henson Moore                    | Director                                                                        | April 30, 2013   |

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| /s/ Hiroshi SakamotoHiroshi Sakamoto          | Director | April 30, 2013   |
|----------------------------------------------------|----------|----------------------------|
| /s/ Walter E. SkowronskiWalter E. Skowronski  | Director | April 30, 2013   |
| /s/ M. Richard SmithM. Richard Smith          | Director | April 30, 2013   |

----

EXHIBIT

|       |                                                                                    |
|------------|-----------------------------------------------------------------------------------------|
| ExhibitNo. | Description                                                                             |
| 31.1       | Certification of the Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a). |
|       |                                                                                    |
| 31.2       | Certification of the Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a). |
|       |                                                                                    |

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