Document:

First Amendment to Second Amended and Restated Credit Agreement

 Exhibit 10.2 
 AMENDMENT NO. 1, dated as of June 19, 2006 (this “Amendment”), to the Second Amended and Restated Credit Agreement, dated as of January 31, 2005, as first amended and restated as of
April 13, 2005, as further amended on February 1, 2006 and further amended and restated as of June 7, 2006 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Credit
Agreement”; capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Credit Agreement), by and among ENERGYSOLUTIONS, LLC (f/k/a/ En-virocare of Utah, LLC), a Utah limited
liability company (“EnergySolutions”), ENV HOLDINGS LLC, the other Loan Parties from time to time signatory thereto, CITICORP NORTH AMERICA, INC., as administrative agent (in such capacity, the “Administrative
Agent”) and the other Agents and Lenders from time to time signatory thereto. 
 WHEREAS, the parties to the Credit Agreement wish
to amend the Credit Agreement on the terms and conditions set forth herein; 
 NOW, THEREFORE, in consideration of the premises and covenants
contained herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound hereby, agree that the Credit Agreement shall be amended as set forth in
Annex I hereto and as so amended is hereby ratified, approved and confirmed in each and every respect. 
 EnergySolutions represents
and warrants to the Lenders as of the date hereof that: 
 (a) The execution and delivery of this Amendment by EnergySolutions
has been duly authorized. 
 (b) Neither the execution or delivery by EnergySolutions of this Amendment, nor compliance by it
with the terms and provisions hereof will, (i) violate any Applicable Law respecting Holdco, EnergySolutions, Parent or their Subsidiaries or (ii) conflict with, result in a breach of or constitute a default under the certificate or
articles of incorporation or by-laws, operating agreement or the partnership agreement, as the case may be, as such documents are amended, of Holdco, of EnergySolutions, of Parent or of any of their Subsidiaries, or under any material indenture,
agreement, or other instrument, to which Holdco, EnergySolutions, Parent or any of their Subsidiaries is a party or by which any of them or their respective properties may be bound. 
 (c) Before and after giving effect to this Amendment, the representations and warranties set forth in the Credit Agreement are true and
correct in all material respects with the same effect as if made on the date hereof, except to the extent such representations and warranties expressly relate to an earlier date in which case they shall be true and correct in all material respects
as of such earlier date. 
  

 (d) At the time of and after giving effect to this Amendment, no Default or Event of
Default has occurred and is continuing. 
 This Amendment may be executed in any number of counterparts and by different parties hereto on
separate counterparts, each of which when so executed and delivered shall be deemed to be an original, but all of which when taken together shall constitute a single instrument. Delivery of an executed counterpart of a signature page of this
Amendment by facsimile transmission shall be effective as delivery of a manually executed counterpart. 
 This Amendment shall become
effective on the date on the Administrative Agent (or its counsel) shall have received from Lenders constituting the Majority Lenders and each of the other parties hereto either (i) a counterpart of this Amendment signed on behalf of such party
or (ii) written evidence satisfactory to the Administrative Agent (which may include telecopy transmission of a signed signature page of this Amendment) that such party has signed a counterpart of this Amendment. 
 THIS AGREEMENT SHALL BE GOVERNED BY, CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 [SIGNATURE PAGES FOLLOW] 
  

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 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date
first above written. 
  

			
	 ENERGYSOLUTIONS, LLC,

	a Utah limited liability company
		
	By:	 	 /S/ MARSHALL E. ERB

	Name:	 	Marshall E. Erb
	Title:	 	Senior Vice President – Treasurer
	Taxpayer Identification Number: 14-1921823
	
	Address of Principal Place of Business:
	423 West 300 South
	Salt Lake City, Utah 84101

  

					
	STATE OF UTAH	 	)	  	
		 	)	  	
	COUNTY OF SALT LAKE	 	)	  	

 On the day of June 15, in the year 2006, before me, the undersigned personally known to me or
proved to me on the basis of satisfactory evidence to be the individual whose name is subscribed to the instrument, personally appeared and acknowledged to me that he or she executed the same in his or her capacity, and that by his or her signature
on the instrument the individual, or the person or entity upon behalf of which the individual acted, executed the instrument. 
  

			
	 /S/ KAREN KIRKWOOD

	 Notary
	 	
	[Notarial Seal]

 [signatures continue on the following pages] 

			
	 CITICORP NORTH AMERICA, INC.,
 as
Administrative Agent, Collateral Agent and a Lender

		
	By:	 	 /S/ JULIE PERSILY

	Name:	 	Julie Persily
	Title:	 	Managing Director

 [signatures continue on the following page] 

			
	 CITICORP NORTH AMERICA, INC.,
 as Revolving
Issuing Bank and Synthetic Issuing Bank

		
	By:	 	 /S/ JULIE PERSILY

	Name:	 	Julie Persily
	Title:	 	Managing Director

 [signatures continue on the following page] 

 Annex I 
 Attached. 

 $630,000,000 
 SECOND AMENDED AND RESTATED CREDIT AGREEMENT 
 Dated as of January 31, 2005 
 Amended and Restated as of April 13, 2005 
 Further Amended and Restated as of June 7, 2006 
 among 
 ENERGYSOLUTIONS, LLC 
 as Borrower 
 ENV HOLDINGS LLC 
 as Guarantor 
 THE LENDERS FROM TIME TO TIME PARTY HERETO 
 and 
 INITIAL ISSUING BANKS NAMED
HEREIN 
 as Lenders and Initial Issuing Banks 
 CITIGROUP GLOBAL MARKETS INC. 
 as Sole Lead Arranger and Sole Bookrunner 
 CITICORP NORTH AMERICA, INC. 
 as
Administrative Agent and Collateral Agent 
 and 
 CALYON NEW YORK BRANCH 
 as Syndication Agent 
  

 Cahill Gordon & Reindel
LLP 
 80 Pine Street 
 New York, New York 10005 

 Table of Contents 
  

					
	 	  	 	  	Page
	
	ARTICLE 1.
	
	Definitions
			
	 Section 1.1
	  	Defined Terms.	  	2
	 Section 1.2
	  	Defined Agreements as Modified.	  	32
	 Section 1.3
	  	Computation of Time Periods; Other Definitional Provisions.	  	32
	 Section 1.4
	  	Accounting Terms.	  	32
	 Section 1.5
	  	Pro Forma Calculations.	  	32
	
	ARTICLE 2.
	
	Loans and Letters of Credit
			
	 Section 2.1
	  	The Loans and the Letters of Credit.	  	3233
	 Section 2.2
	  	Manner of Borrowing and Disbursement.	  	34
	 Section 2.3
	  	Interest.	  	39
	 Section 2.4
	  	Repayment.	  	40
	 Section 2.5
	  	Fees.	  	4142
	 Section 2.6
	  	Optional Prepayments and Application of Prepayments.	  	4243
	 Section 2.7
	  	Synthetic Deposit Reductions.	  	43
	 Section 2.8
	  	Mandatory Prepayments.	  	4344
	 Section 2.9
	  	Evidence of Debt.	  	4445
	 Section 2.10
	  	Manner of Payment.	  	4546
	 Section 2.11
	  	Reimbursement.	  	4748
	 Section 2.12
	  	Pro Rata Treatment.	  	48
	 Section 2.13
	  	Capital Adequacy.	  	48
	 Section 2.14
	  	Taxes.	  	4948
	 Section 2.15
	  	Increase in Commitments	  	5148
	 Section 2.16
	  	Synthetic Deposit Account.	  	5348
	 Section 2.17
	  	Synthetic Letters of Credit.	  	5648
	 Section 2.18
	  	Termination and Reduction of Commitments	  	5848
	
	ARTICLE 3.
	
	Conditions Precedent
			
	 Section 3.1
	  	Conditions Precedent to Initial Loans.	  	5948
	 Section 3.2
	  	Conditions Precedent to Each Loan.	  	6348
	
	ARTICLE 4.
	
	Representations and Warranties
			
	 Section 4.1
	  	Representations and Warranties.	  	6448
	 Section 4.2
	  	Survival of Representations and Warranties, Etc.	  	7348

  

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	 	  	 	  	Page
	
	ARTICLE 5.
	
	General Covenants
			
	 Section 5.1
	  	Preservation of Existence and Similar Matters.	  	7348
	 Section 5.2
	  	Business; Compliance with Applicable Law.	  	7448
	 Section 5.3
	  	Maintenance of Properties.	  	7448
	 Section 5.4
	  	Accounting Methods and Financial Records.	  	7448
	 Section 5.5
	  	Insurance.	  	7448
	 Section 5.6
	  	Payment of Taxes and Claims.	  	7548
	 Section 5.7
	  	Visits and Inspections.	  	7548
	 Section 5.8
	  	Payment of Indebtedness; Loans.	  	7648
	 Section 5.9
	  	Use of Proceeds.	  	7648
	 Section 5.10
	  	Real Estate.	  	7648
	 Section 5.11
	  	Indemnity.	  	7748
	 Section 5.12
	  	Interest Rate Hedging.	  	7848
	 Section 5.13
	  	Covenants Regarding Formation of Subsidiaries and the Making of Acquisitions	  	7848
	 Section 5.14
	  	Maintenance of Rating.	  	7948
	 Section 5.15
	  	Environmental Compliance.	  	8048
	 Section 5.16
	  	Required Consents and Transfer of Licenses in Event of Default.	  	8148
	 Section 5.17
	  	Subordination of Intercompany Loans	  	8148
	 Section 5.18
	  	IPO Reorganization	  	8148
	 Section 5.19
	  	Duratek Payoff	  	8148
	 Section 5.20
	  	Post-Closing Collateral Matters	  	8248
	
	ARTICLE 6.
	
	Information Covenants
			
	 Section 6.1
	  	Quarterly and Interim Financial Statements and Information.	  	8348
	 Section 6.2
	  	Annual Financial Statements and Information.	  	8348
	 Section 6.3
	  	Performance Certificates.	  	8348
	 Section 6.4
	  	Copies of Other Reports.	  	8448
	 Section 6.5
	  	Notice of Litigation and Other Matters.	  	8448
	
	ARTICLE 7.
	
	Negative Covenants
			
	 Section 7.1
	  	Indebtedness of Holdco, EnergySolutions and Its Subsidiaries.	  	8548
	 Section 7.2
	  	Limitation on Liens.	  	8848
	 Section 7.3
	  	Amendment and Waiver.	  	8848
	 Section 7.4
	  	Liquidation, Merger, Disposition of Assets.	  	8848
	 Section 7.5
	  	Limitation on Guaranties.	  	8948
	 Section 7.6
	  	Investments and Acquisitions.	  	8948
	 Section 7.7
	  	Financial Covenants.	  	9248
	 Section 7.8
	  	Affiliate Transactions and Restricted Payments.	  	9348
	 Section 7.9
	  	Real Estate.	  	9348

  

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	 	  	 	  	Page
			
	 Section 7.10
	  	ERISA Liabilities.	  	9348
	 Section 7.11
	  	Limitation on Preferred Stock.	  	9448
	 Section 7.12
	  	Negative Pledge.	  	9448
	 Section 7.13
	  	Payment Restrictions Affecting Subsidiaries.	  	9448
	 Section 7.14
	  	Speculative Transactions.	  	9548
	 Section 7.15
	  	Name, Jurisdiction of Organization and Business.	  	9548
	 Section 7.16
	  	[Reserved]	  	9548
	 Section 7.17
	  	Permitted Activities of Holdings and Parent	  	9548
	
	ARTICLE 8.
	
	Default
			
	 Section 8.1
	  	Events of Default.	  	9648
	 Section 8.2
	  	Remedies.	  	9948
	 Section 8.3
	  	Payments Subsequent to Declaration of Event of Default.	  	9948
	 Section 8.4
	  	Actions in Respect of the Letters of Credit upon Default.	  	10048
	 Section 8.5
	  	Certain Cure Rights.	  	10048
	
	ARTICLE 9.
	
	The Agents
			
	 Section 9.1
	  	Appointment and Authorization.	  	10148
	 Section 9.2
	  	Interest Holders.	  	10148
	 Section 9.3
	  	Consultation with Counsel.	  	10148
	 Section 9.4
	  	Documents.	  	10248
	 Section 9.5
	  	CNAI and Affiliates.	  	10248
	 Section 9.6
	  	Responsibility of the Administrative Agent and the Collateral Agent.	  	10248
	 Section 9.7
	  	Collateral and Guaranty Matters.	  	10248
	 Section 9.8
	  	Action by the Administrative Agent and the Collateral Agent.	  	10348
	 Section 9.9
	  	Notice of Default or Event of Default.	  	10448
	 Section 9.10
	  	Responsibility Disclaimed.	  	10448
	 Section 9.11
	  	Indemnification.	  	10548
	 Section 9.12
	  	Credit Decision.	  	10648
	 Section 9.13
	  	Successor Agents.	  	10748
	 Section 9.14
	  	Delegation of Duties.	  	10848
	 Section 9.15
	  	Additional Agents.	  	10848
	 Section 9.16
	  	Administrative Agent May File Proofs of Claim.	  	10848
	 Section 9.17
	  	Security Documents	  	10948
	
	ARTICLE 10.
	
	Change in Circumstances
	Affecting Fixed Rate Loans
			
	 Section 10.1
	  	Eurodollar Basis Determination Inadequate or Unfair.	  	10948
	 Section 10.2
	  	Illegality.	  	10948
	 Section 10.3
	  	Increased Costs.	  	11048
	 Section 10.4
	  	Effect on Other Loans.	  	11248

  

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	 	  	 	  	Page
	
	ARTICLE 11.
	
	Miscellaneous
			
	 Section 11.1
	  	Notices.	  	11248
	 Section 11.2
	  	Costs and Expenses.	  	11448
	 Section 11.3
	  	Waivers.	  	11448
	 Section 11.4
	  	Set-Off.	  	11548
	 Section 11.5
	  	Binding Effect and Assignment.	  	11548
	 Section 11.6
	  	Accounting Principles.	  	11948
	 Section 11.7
	  	Counterparts.	  	11948
	 Section 11.8
	  	Governing Law and Jurisdiction.	  	11948
	 Section 11.9
	  	Severability.	  	12048
	 Section 11.10
	  	Interest.	  	12048
	 Section 11.11
	  	Table of Contents and Headings.	  	12048
	 Section 11.12
	  	Amendment and Waiver.	  	12048
	 Section 11.13
	  	Entire Agreement.	  	12248
	 Section 11.14
	  	Other Relationships.	  	12248
	 Section 11.15
	  	Directly or Indirectly.	  	12248
	 Section 11.16
	  	Reliance on and Survival of Various Provisions.	  	12248
	 Section 11.17
	  	Senior Debt.	  	12348
	 Section 11.18
	  	Obligations Several.	  	12348
	 Section 11.19
	  	Confidentiality.	  	12348
	 Section 11.20
	  	No Liability of the Issuing Banks.	  	12348
	 Section 11.21
	  	Patriot Act Notice.	  	12448
	 Section 11.22
	  	Performance.	  	12448
	 Section 11.23
	  	The Platform.	  	12448
	 Section 11.24
	  	Holdco Release.	  	12548
	 Section 11.25
	  	Conversion of Currencies	  	48
	
	ARTICLE 12.
	
	Waiver of Jury Trial
			
	 Section 12.1
	  	Waiver of Jury Trial.	  	12648

  

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 SECOND AMENDED AND RESTATED CREDIT AGREEMENT 
 This SECOND AMENDED AND RESTATED CREDIT AGREEMENT, dated as of January 31, 2005, as first amended and restated as of April 13, 2005 and as further amended on
February 1, 2006 and further amended and restated as of June 7, 2006, is made by and among ENERGYSOLUTIONS, LLC, a Utah limited liability company (“EnergySolutions”), ENV HOLDINGS LLC (“Holdco”), the
Lenders party hereto from time to time, CITIGROUP GLOBAL MARKETS INC. (“CGMI”), as sole lead arranger (the “Arranger”), Citicorp North America, Inc. (“CNAI”), as administrative agent (the
“Administrative Agent”), as collateral agent (the “Collateral Agent”), as the initial revolving issuing bank (the “Initial Revolving Issuing Bank”) and as the initial synthetic issuing bank (the
“Initial Synthetic Issuing Bank”) and Calyon New York Branch (“Calyon”), as syndication agent (the “Syndication Agent”). 
 WITNESSETH: 
 WHEREAS, EnergySolutions, Holdco, certain lenders party thereto (the “Original
Lenders”), and Calyon, as administrative agent, syndication agent, documentation agent and sole lead arranger entered into that certain credit agreement, dated as of January 31, 2005 and first amended and restated as of April 13,
2005 and as further amended on February 1, 2006 (the “Original Credit Agreement”); 
 WHEREAS, EnergySolutions
requested various Commitments and Loans on January 31, 2005 and the First Amendment Effective Date, which occurred on such dates; 
 WHEREAS, on the First Amendment Effective Date, EnergySolutions, Holdco, certain lenders and agents party thereto entered into the Second Lien Credit Agreement, pursuant to which the lenders made term loans to EnergySolutions in an
aggregate principal amount of $170,000,000; 
 WHEREAS, on the Second Amendment Effective Date, EnergySolutions shall acquire, directly or
indirectly (the “Duratek Acquisition”), all of the equity interests of Duratek, Inc., a Delaware corporation (“Target”, and (x) after the Merger (as defined below) and (y) for the purposes of the
representations and warranties made pursuant to the Loan Documents on the Second Amendment Effective Date, “Duratek”), in accordance with a merger agreement dated as of February 6, 2006 among EnergySolutions, Dragon Merger
Corporation (“Dragon”, and before the Merger, “Duratek”) and Target (the “Duratek Acquisition Agreement”) pursuant to which Dragon will merge (the “Merger”) on the Second Amendment
Effective Date with and into Target, with Target surviving the Merger; 
 WHEREAS, in connection with the Duratek Acquisition,
EnergySolutions shall repay all existing indebtedness of the Acquired Business (as defined below) (the “Duratek Refinancing”), other than such indebtedness set forth on Schedule 1-A hereto; 
 WHEREAS, simultaneously herewith, Duratek shall enter into a credit agreement (the “Duratek Loan Agreement”), between Duratek, the
Collateral Agent and the other agents and lenders party thereto, pursuant to which the lenders shall make term loans to Duratek in an aggregate principal amount of $240,000,000 (the “Duratek Loans”); 
 WHEREAS, the Obligations (as defined in the Original Credit Agreement, hereinafter the “Original Obligations”) of EnergySolutions and
the other Loan Parties under the Original Credit 

 
all or substantially all of any other Person, which Person shall then become consolidated with EnergySolutions or any such Subsidiary in accordance with
GAAP, or (b) any acquisition by EnergySolutions or any of the Subsidiaries of all or substantially all of the assets of any other Person; provided that Acquisition shall not mean or include any acquisition of any interest in real
property, either individually or together with the acquisition of other property or assets. 
 “Acquisition Entity” shall
mean in respect of any Acquisition of any entity, collectively, and on a consolidated basis, such entity and all of the other entities, if any, that are Affiliates or Subsidiaries of such entity and that are acquired with such entity in one
transaction or a series of two or more related transactions. 
 “Additional Permitted Debt” shall mean Indebtedness of
EnergySolutions and, after an IPO Reorganization, Duratek, that (i) is unsecured, (ii) is not guaranteed by Holdco, Parent, EnergySolutions or any of their Subsidiaries, (iii) matures no earlier than 180 days after the Maturity Date,
(iv) requires no payment of principal (whether by way of scheduled amortization, mandatory redemption, mandatory prepayment, sinking fund or otherwise) to be made and (v) does not require Parent, EnergySolutions, Duratek or any of the
Subsidiaries to maintain any specified financial condition. 
 “Administrative Agent” shall have the meaning set forth in
the preamble to this Agreement. 
 “Administrative Agent’s Account” shall mean the account of the Administrative Agent
maintained by the Administrative Agent at its office at 390 Greenwich Street, New York, NY 10013, Account No. 36852248 Attention: Christina Quezon, or such other account as the Administrative Agent shall specify from time to time in writing to
the Lender Parties. 
 “Affiliate” shall mean, with respect to a Person, any other Person directly or indirectly
controlling, controlled by, or under common control with, such first Person. For purposes of this definition, “control” when used with respect to any Person includes, without limitation, the direct or indirect beneficial ownership of more
than ten percent (10%) of the voting securities or voting equity of such Person, or the power to direct or cause the direction of the management and policies of such Person whether by contract or otherwise. Unless otherwise specified,
“Affiliate” shall mean an Affiliate of EnergySolutions, and shall include the Subsidiaries. 
 “Agent Parties”
shall have the meaning set forth in Section 11.23. 
 “Agents” shall mean, collectively, the Administrative
Agent, the Collateral Agent and the Syndication Agent. 
 “Agreement” shall mean this Credit Agreement, dated as of
January 31, 2005, as first amended and restated as of April 13, 2005, as amended as of February 1, 2006 and as further amended and restated as of June 7, 2006, as it may be amended, restated, amended and restated, supplemented or
otherwise modified from time to time. 
 “Agreement Currency” shall have the meaning set forth in Section 11.25.

 “Agreement Date” shall mean January 31, 2005. 
  

 -3- 

 “Amendment Transactions” shall have the meaning set forth in the recitals to this
Agreement. 
 “Applicable Creditor” shall have the meaning set forth in Section 11.25. 
 “Applicable Law” shall mean, in respect of any Person, all provisions of constitutions, statutes, rules, regulations and orders of
governmental bodies or regulatory agencies applicable to such Person, including, without limiting the foregoing, the Licenses and all Environmental Laws, and all orders, decisions, judgments and decrees of all courts and arbitrators in proceedings
or actions to which the Person in question is a party or by which it is bound. 
 “Applicable Margin” shall mean the
interest rate margin applicable to Loans and Synthetic Deposits hereunder as determined in accordance with Section 2.3(f) hereof. 
 “Approved Fund” shall mean, with respect to any Lender Party, any fund that invests in commercial loans and is managed or advised by such Lender Party or an Affiliate of such Lender Party, or by the same investment advisor
as such Lender Party or by an Affiliate of such investment advisor. 
 “Arranger” shall have the meaning set forth in the
preamble to this Agreement. 
 “Assignment and Acceptance” shall mean an Assignment and Acceptance Agreement substantially
in the form attached hereto as Exhibit P. 
 “Assumption Agreement” shall mean an Assumption Agreement substantially
in the form attached hereto as Exhibit B. 
 “Authorized Signatory” shall mean such officers of each Loan Party as
may be duly authorized and designated in writing by such Loan Party to execute documents, agreements and instruments on behalf of such Loan Party. 
 “Available Amount” of any Letter of Credit shall mean, at any time, (i) if the Letter of Credit is denominated in Dollars, the maximum amount available to be drawn under such Letter of Credit at such time
(assuming compliance at such time with all conditions to drawing) and (ii) if the Letter of Credit is denominated in an Available Foreign Currency, the Dollar Equivalent of the maximum amount available to be drawn under such Letter of Credit
at such time (assuming compliance at such time with all conditions to drawing). 
 “Available Foreign Currencies” shall mean
Canadian Dollars and Euro or such other currency as agreed to by the Administrative Agent and EnergySolutions. 
 “Base
Rate” shall mean a fluctuating interest rate per annum in effect from time to time, which rate per annum shall at all times be equal to the higher of: 
 (a) the rate of interest announced by CNAI, from time to time, as its prime rate in effect at its principal office in the city of New
York; and 
  

 -4- 

 (b) a rate of interest that is
 1/2 of 1% above the Federal Funds Rate. 
 The Base Rate is an index rate and is not necessarily intended to be the lowest or best rate of interest charged to customers in connection with
extensions of credit or to other banks. 
 “Base Rate Basis” shall mean a simple interest rate equal to the sum of
(a) the Base Rate and (b) the Applicable Margin. The Base Rate Basis shall be adjusted automatically as of the opening of business on the effective date of each change in the Base Rate to account for such change and shall also be changed
to reflect adjustments in the Applicable Margin. 
 “Base Rate Option Loan(s)” shall mean either or both of a Base Rate Term
Loan and a Base Rate Revolving Loan, as the context may require. 
 “Base Rate Revolving Loan” shall mean the portion of the
Revolving Loans as to which EnergySolutions has elected the Base Rate Basis for the interest rate thereon, in accordance with the provisions of Section 2.2 hereof, and which, except in the case of a Base Rate Revolving Loan the proceeds
of which shall be used solely to repay or prepay in full outstanding Letter of Credit Loans, shall be in a principal amount of at least $500,000 and in an integral multiple of $100,000. 
 “Base Rate Term Loan” shall mean the portion of the Term Loans as to which EnergySolutions has elected the Base Rate Basis for the
interest rate thereon, in accordance with the provisions of Section 2.2 hereof, and which shall be in a principal amount of at least $5,000,000 and in an integral multiple of $1,000,000. 
 “Base Return” means an amount equal to the Eurodollar Basis for the applicable
Investment Period as if such deposit were deemed to be a Eurodollar Option Loan hereunder for such Investment Period (exclusive of any Applicable Margin that would be applicable thereto). 
 “Business Day” shall mean a day of the year on which banks are not required or authorized by law to close in New York, New York and, if
the applicable Business Day relates to any Eurodollar Option Loans, on which dealings are carried on in the London interbank market. 
 “Calyon” shall have the meaning set forth in the preamble to this Agreement. 
 “Canadian Dollars”
shall mean lawful money of Canada. 
 “Capital Expenditures” shall mean, in respect of any Person, without duplication,
expenditures for (i) the purchase of tangible assets of long-term use which are capitalized in accordance with GAAP and (ii) Real Property Acquisitions, to the extent not otherwise included in clause (i); provided that Capital
Expenditures shall not include any expenditures that (a) constitute Permitted Acquisitions, (b) are made with casualty insurance proceeds to the extent such proceeds are permitted to be reinvested pursuant to the terms of this Agreement,
(c) are deemed to occur by virtue of the trade-in or other exchange of existing assets permitted under this Agreement or (d) are made with the cash proceeds of an asset disposition permitted under this Agreement to purchase an asset of
like kind or function. 
  

 -5- 

 “Debt Service” shall mean, for any period, the amount of Cash Interest Expense, together
with scheduled principal repayments (excluding any repayments made or required to be made in accordance with Section 2.8 hereof) in respect of Indebtedness for Money Borrowed, of EnergySolutions (or, after the IPO Reorganization, Parent)
and its Subsidiaries on a consolidated basis. For purposes of this definition, “principal” shall include the principal component of payments for such period in respect of Capitalized Lease Obligations. 
 “Deed of Trust” shall mean that certain Utah Deed of Trust and Fixture Filing, dated as of the Agreement Date, executed by
EnergySolutions in favor of the Administrative Agent, as amended through the date hereof. 
 “Deed of Trust Amendment” shall
mean the Fourth Amendment to Utah Deed of Trust and Fixture Filing, dated as of the Second Amendment Effective Date, from EnergySolutions, as trustor, to the Collateral Agent, as beneficiary, in respect of the Deed of Trust, in form and substance
reasonably satisfactory to the Collateral Agent and as the same may be further amended from time to time. 
 “Default” shall
mean any of the events specified in Section 8.1, regardless of whether there shall have occurred any passage of time or giving of notice, or both, that would be necessary in order to constitute such event. 
 “Default Rate” shall mean a simple per annum interest rate equal to the sum of the otherwise applicable Interest Rate Basis plus
two percent (2%). With respect to amounts (other than principal) bearing interest at the Default Rate, for purposes of the foregoing sentence, the words “otherwise applicable Interest Rate Basis” shall be deemed to mean the Base Rate
Basis. 
 “Defaulting Lender” shall have the meaning set forth in Section 2.2(e)(iv). 
 “Derivatives Contract” shall mean any forward contract (other than a contract to purchase inputs or provide services entered into in the
ordinary course of the Permitted Business), futures contract, option (other than an option to purchase inputs or provide services entered into in the ordinary course of the Permitted Business), swap, notional principal contract, synthetic position
or other financial contract similar to any of the foregoing. 
 “Disbursement” shall have the meaning set forth in
Section 2.17(d). 
 “Dollar Equivalent” shall mean, on any date of determination, (a) with respect to any
amount denominated in Dollars, such amount, and (b) with respect to any amount denominated in any Available Foreign Currency, the equivalent in Dollars of such amount, determined by the Administrative Agent using the applicable Exchange
Rate. 
 “Dollars” or “$” shall mean the basic unit of the lawful currency of the United States of
America. 
 “Duratek” shall have the meaning set forth in the recitals to this Agreement. 
 “Duratek Acquisition” shall have the meaning set forth in the recitals to this Agreement. 
  

 -8- 

 thereunder, relating to human health or safety, Hazardous Materials, pollution, noise, the environment or natural
resources, as such laws (and all other items indicated above) have been or may be amended from time to time. Environmental Law includes, but is not limited to, the Comprehensive Environmental Response, Compensation and Liability Act
(“CERCLA”), the Hazardous Materials Transportation Act, the Resource Conservation and Recovery Act, the Atomic Energy Act, the Energy Reorganization Act, the Uranium Mill Tailings Radiation Control Act, the Hazardous Waste
Transportation Act, the Energy Policy Act, the Low-level Radioactive Waste Policy Act, the Nuclear Waste Policy Act, the Utah Radiation Control Act, the Utah Air Conservation Act, the Utah Solid and Hazardous Waste Act, the Utah Water Quality Act,
the Tennessee Radiological Health Service Act, the South Carolina Radiation Control Act, the South Carolina Radioactive Waste Transportation and Disposal Act, the Tennessee Solid Waste Disposal Act, the Clean Water Act, the Clean Air Act, the Toxic
Substances Control Act, the Federal Insecticide, Fungicide, and Rodenticide Act, the Oil Pollution Act of 1990 and the Occupational Safety and Health Act; each as from time to time amended, and the regulations promulgated thereunder, and all
analogous state and local statutes in any state in which EnergySolutions or any of the Subsidiaries is engaged in a Permitted Business, including any environmental transfer of ownership notification or approval statutes. 
 “Environmental Permit” shall mean any permit, authorization, approval, license, registration, consent, order, certificate, waiver,
exception, variance, exemption or filing with or issued by any court or governmental or regulatory agency, authority, entity, department, commission or board relating to or required by any Environmental Law. 
 “Environmental Testing” shall have the meaning set forth in Section 5.15(d) hereof. 
 “Equity Interests” means shares of capital stock, partnership interests, membership interests in a limited liability company, beneficial
interests in a trust or other equity ownership interests in a Person. 
 “Equity Sponsors” shall mean, collectively, the
Primary Equity Sponsors and the Local Investors. 
 “ERISA” shall mean the Employee Retirement Income Security Act of 1974,
as in effect from time to time. 
 “ERISA Affiliate” shall mean any Person, including a Subsidiary or an Affiliate of
EnergySolutions, that is a member of any group of organizations (within the meaning of Code Section 414(b), 414(c), 414(m) or 414(o)) of which EnergySolutions is a member. 
 “ERISA Affiliate Plan” shall mean any employee pension benefit plan (other than a Multiemployer Plan) as defined in Section 3(2) of
ERISA, subject to Title IV of ERISA or Section 302 of ERISA or Section 412 of the Code maintained by an ERISA Affiliate or to which an ERISA Affiliate contributed, contributes or is obligated to contribute. 
 “Euro” or means the single currency of the Participating Member States. 
 “Eurocurrency Liabilities” has the meaning set forth in Regulation D of the Board of Governors of the Federal Reserve System, as in
effect from time to time. 
  

 -10- 

 2.2 hereof, and which shall be in a principal amount of at least $5,000,000 and in an integral multiple of
$1,000,000. 
 “Event of Default” shall mean any of the events set forth in Section 8.1, provided that any
requirement for notice or lapse of time or both has been satisfied. 
 “Excess Cash Flow” shall mean (y) for the first
three quarters of each fiscal year, based upon the unaudited financial statements for such fiscal quarter required to be provided under Section 6.1 hereof, and (z) for the fourth quarter of each fiscal year, based on the audited
financial statements for such fiscal year required to be provided under Section 6.2 hereof and calculated, for such fourth quarter, by subtracting from the annual amount of each element of the determination of Excess Cash Flow, the
aggregate amount of such element utilized in determining Excess Cash Flow for any of the preceding fiscal periods during such fiscal year, the remainder, if any, without duplication, of (a) the Operating Cash Flow (calculated by excluding from
Operating Cash Flow (x) the net income of Duratek and its Subsidiaries on a consolidated basis determined in accordance with GAAP, (y) any items that would be added to the net income of Duratek and its Subsidiaries in the calculation of
the operating cash flow of Duratek and its Subsidiaries (calculated in the same manner, and with the same adjustments, as “Operating Cash Flow” of EnergySolutions and its Subsidiaries) and (z) the costs, expenses and charges
identified in clauses (f) and (g) of the definition of “Operating Cash Flow”) for such fiscal quarter minus (b) the sum of the following: (i) Capital Expenditures by EnergySolutions and its Subsidiaries (other than
Duratek and its Subsidiaries) during such fiscal quarter (other than Capital Expenditures that are financed with the proceeds of Indebtedness); (ii) Tax Distributions made by EnergySolutions and cash Taxes paid by EnergySolutions and its
Subsidiaries (other than Duratek and its Subsidiaries) during such fiscal quarter; (iii) Debt Service paid by EnergySolutions and its Subsidiaries (other than Duratek and its Subsidiaries) for such fiscal quarter; (iv) to the extent not
included in the calculation of Operating Cash Flow, legal fees and expenses of, or the payment of any judgment against, any Loan Party paid by EnergySolutions and Permitted Advisory Fees for such fiscal quarter and (v) cash paid by
EnergySolutions or any of the Subsidiaries (other than Duratek and its Subsidiaries) in respect of a Permitted Acquisition during such fiscal quarter; provided that (i) after the IPO Reorganization, all references to EnergySolutions in this
definition of “Excess Cash Flow” (other than in clause (x)) shall be deemed to be references to Parent and (ii) “Duratek and its Subsidiaries” shall not include EnergySolutions and its Subsidiaries if EnergySolutions is a
Subsidiary of Duratek. 
 “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended. 
 “Exchange Rate” shall mean, on any day with respect to any Available Foreign Currency, the rate at which such Available Foreign Currency may
be exchanged into Dollars, as set forth at approximately 11:00 a.m. (London time) on such day on the Reuters World Currency Page for such Available Foreign Currency; in the event that such rate does not appear on any Reuters World Currency Page, the
Exchange Rate shall be determined by reference to such other publicly available service for displaying exchange rates as determined by the Administrative Agent, or, in the absence of such publicly available service, such Exchange Rate shall instead
be the arithmetic average of the spot rates of exchange of the Administrative Agent in the market where its foreign currency exchange operations in respect of such Available Foreign Currency are then being conducted, at or about 10:00 a.m. (New York
City time) on such date for the purchase of Dollars for delivery two Business Days later. 
  

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 “Initial Synthetic Issuing Bank” shall have the meaning set forth in the preamble to
this Agreement. 
 “Intercompany Loans” shall have the meaning set forth in Section 7.6(c) hereof. 

“Interest Coverage Ratio” shall mean, as of any calculation date and for the four fiscal-quarter period then ended, on a consolidated
basis for EnergySolutions (or, after the IPO Reorganization, Parent) and its Subsidiaries, the ratio of Operating Cash Flow to Cash Interest Expense for such period. 
 “Interest Period” shall mean (a) in connection with any Base Rate Option Loan, the period beginning on the date such Loan is made or deemed continued and ending on the last Business Day of the
calendar quarter in which such Loan is made or deemed continued; provided, however, that if a Base Rate Option Loan is made or deemed continued on the last day of any calendar quarter, it shall have an Interest Period ending on, and
its Payment Date shall be, the last day of the following calendar quarter, and (b) in connection with any Eurodollar Option Loan, the term of the related Eurodollar Period selected by EnergySolutions or otherwise determined in
accordance with this Agreement and (c) in connection with any Synthetic Deposit, the period beginning on (and including) the date on which such Synthetic Deposit is deposited or on the last day of the preceding Interest Period and ending on
(but excluding) the date which is 30 days thereafter. Notwithstanding the foregoing, however, (i) any applicable Interest Period which would otherwise end on a day which is not a Business Day shall be extended to the next succeeding
Business Day unless, with respect to Eurodollar Option Loans only, such Business Day falls in another calendar month, in which case such Interest Period shall end on the next preceding Business Day, (ii) any applicable Interest Period, with
respect to Eurodollar Option Loans only, which begins on a day for which there is no numerically corresponding day in the calendar month during which such Interest Period is to end shall (subject to clause (i) above) end on the last day
of such calendar month, and (iii) no Interest Period shall extend beyond the Term Loan Maturity Date or the Revolving Maturity Date with respect to Interest Periods applicable to Revolving Loans and Term Loans or such earlier date as would
interfere with EnergySolutions’ repayment obligations hereunder. Interest shall be due and payable with respect to any Loan as provided in Section 2.3 hereof. 
 “Interest Rate Basis” shall mean the Base Rate Basis or the Eurodollar Basis, as appropriate. 
 “Investment” shall mean, with respect to any Person, any loan, advance or extension of credit (other than to customers in the ordinary
course of business) by such Person to, or any Guaranty or other contingent liability with respect to the capital stock, limited partnership interests, general partnership interests, or other securities or other equity or ownership interests,
Indebtedness or other obligations of, or any contributions to the capital of, any other Person, or any ownership, purchase or other acquisition by such Person of any interest in any Indebtedness, capital stock, limited partnership interests, general
partnership interests, or other securities or other equity or ownership interests of any such other Person, other than an Acquisition. “Investment” shall also include the total cost of any future commitment or other obligation binding on
any Person to make an Investment or any subsequent Investment. 
 “Investment
Period” means, relative to any Synthetic Deposits earning a Participation Fee, the period beginning on (and including) the date on which such Synthetic Deposit is deposited or on the last day of the preceeding Investment
Period and ending on (but excluding) the day which numerically corresponds to such date three months thereafter; provided, however, that if any such Investment Period would otherwise end on a day which is not a Business Day, such Investment Period
shall end on the next 
  

 -16- 

 following Business Day (unless such next following Business Day is the first Business Day of a calendar month, in
which case such Investment Period shall end on the Business Day next preceding such numerically corresponding day). 
 “IPO
Reorganization” shall mean a series of substantially contemporaneous transactions in connection with or in contemplation of an initial public offering of the shares of common stock of Parent whereby (i) Holdco becomes the direct owner
of 100% of the economic and voting interest in Parent and (ii) Parent becomes the direct or indirect owner of 100% of the economic and voting interests in each of EnergySolutions and Duratek to the extent Parent does not theretofore own,
directly or indirectly, 100% of the economic and voting interests in Duratek. For the avoidance of doubt, the IPO Reorganization may include, without limitation, (a) the distribution of shares of capital stock of Parent by Holdco to its direct
or indirect owners, (b) the contribution of shares of capital stock of Parent to Holdco, (c) the contribution of all the outstanding equity interests in EnergySolutions to Parent and/or to a wholly owned subsidiary of Parent that is a Loan
Party and (d) one or more indirect corporate investors in Holdco merges with and into, or transfers all or substantially all its assets (subject to its liabilities) to Parent, in connection with or in contemplation of an initial public offering
of the shares of common stock of Parent. 
 “Issuing Banks” shall mean the Revolving Issuing Bank and the Synthetic Issuing
Bank. 
 “Judgment Currency” shall have the meaning set forth in Section 11.25. 
 “L/C Collateral Account” shall mean an interest bearing cash collateral account to be established and maintained by the Administrative
Agent, over which the Administrative Agent shall have sole dominion and control, upon terms as may be satisfactory to the Administrative Agent. 
 “L/C Disbursement” shall mean a payment or disbursement made by the Revolving Issuing Bank pursuant to a Revolving Letter of Credit. 
 “L/C Related Documents” shall have the meaning set forth in Section 2.4(c)(ii)(A). 
 “Lender Party” shall mean any Lender or any Issuing Bank. 
 “Lenders” shall mean each financial
institution party to the Original Credit Agreement or listed on the signature page hereto as a Lender, and any other Person that has become a party to the Original Credit Agreement in accordance with Section 11.5 thereof or which becomes
a Lender hereunder pursuant to Section 11.5 for so long as such Lender or Person, as the case may be, shall be a party to this Agreement. 
 “Letter of Credit” means, as the context may require, a Revolving Letter of Credit and/or a Synthetic Letter of Credit. 
 “Letter of Credit Agreement” means, as the context may require, a Revolving Letter of Credit Agreement and/or a Synthetic Letter of Credit Agreement. 
 “Letter of Credit Loan” shall mean a funding made by the Revolving Issuing Bank or any Revolving Lender pursuant to
Section 2.2(f)(ii). 
  

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 “Leverage Ratio” shall mean, as of any calculation date and for the relevant period then
ended, on a consolidated basis for EnergySolutions (or, after the IPO Reorganization, Parent) and its Subsidiaries, the ratio of Indebtedness for Money Borrowed as of such calculation date to the Operating Cash Flow for such period. 
 “LGB” shall mean Lindsay Goldberg & Bessemer L.P. and its Affiliates. 
 “Licenses” shall mean any permits or licenses held by EnergySolutions, Parent or any of the Subsidiaries, all of which are listed as of
the Second Amendment Effective Date on Schedule 2 hereto. 
 “Lien” shall mean, with respect to any property, any
mortgage, lien, pledge, assignment, charge, security interest, title retention agreement, levy, execution, seizure, attachment, garnishment or other encumbrance of any kind in respect of such property, whether created by statute, contract, the
common law or otherwise, and whether or not choate, vested or perfected; provided, however, that “Lien” shall not include any license, sublicense, lease or sublease of or with respect to any personal property. 
 “Loan Documents” shall mean this Agreement (including the Original Credit Agreement, as amended and restated hereby), the Assumption
Agreement, any Notes, the Security Documents, the Guarantees, each Letter of Credit Agreement, the Fee Letter, all Requests for Loans and all other material documents and agreements executed or delivered by a Loan Party in connection with this
Agreement. 
 “Loan Parties” shall mean, collectively, EnergySolutions, each Subsidiary Guarantor, Holdco and, upon its
formation, Parent. 
 “Loans” shall mean, collectively, the Revolving Loans, the Letter of Credit Loans
and, the Term Loans and unreimbursed Disbursements in accordance with Section 2.17(d). 
 “Local
Investors” shall mean, collectively, Peterson Partners IV, L.P. and its Affiliates. 
 “Majority Lenders” shall
mean, at any time, lenders owed or holding at least a majority in interest of the sum, without duplication, of (a) the aggregate principal amount of the Loans outstanding at such time, (b) the aggregate Available Amount of all Revolving
Letters of Credit outstanding at such time (c) the aggregate amount of Synthetic Deposits at such time, (d) the aggregate Unused Revolving Commitments at such time and (e) the aggregate principal amount of the Duratek Loans
outstanding at such time; provided, however, that (I) if any Lender shall be a Defaulting Lender at such time, there shall be excluded from the determination of Majority Lenders at such time (i) the aggregate principal amount
of the Loans owing to such Lender (in its capacity as a Lender) and outstanding at such time, (ii) such Lender’s Pro Rata Share of the aggregate Available Amount of all Revolving Letters of Credit outstanding at such time and
(iii) the Unused Revolving Commitment of such Lender at such time and (II) if any lender shall be a “Defaulting Lender” (as defined in the Duratek Loan Agreement) at such time, there shall be excluded from the determination of
Majority Lenders at such time the aggregate principal amount of the Duratek Loans owing to such lender (in its capacity as a lender) and outstanding at such time. For purposes of this definition, the aggregate principal amount of (x) Letter of
Credit Loans owing to the Revolving Issuing Bank and (y) the Available Amount of each Revolving Letter of Credit shall be deemed “owed to” the Revolving Lenders ratably in accordance with their respective Revolving Commitments.

  

 -18- 

 a period in which Operating Cash Flow is to be determined hereunder, such Operating Cash Flow will be determined on a pro
forma basis as if such Acquisition were consummated on the first day of the relevant period and (ii) after the IPO Reorganization, all references to EnergySolutions in this definition of “Operating Cash Flow” shall be deemed to be
references to Parent. 
 “Original Collateral” shall have the meaning set forth in the recitals to this Agreement.

 “Original Credit Agreement” shall have the meaning set forth in the recitals to this Agreement. 
 “Original Lenders” shall have the meaning set forth in the recitals to this Agreement. 
 “Original Obligations” shall have the meaning set forth in the recitals to this Agreement. 
 “Original Security Documents” shall have the meaning set forth in the recitals to this Agreement. 
 “Original Term Loans” shall have the meaning set forth in the recitals to this Agreement. 
 “Other Taxes” shall have the meaning set forth in Section 2.14. 
 “Parent” shall mean a Person formed prior to, on or after the Second Amendment Effective Date that Guarantees the Secured Obligations
and (i) prior to the IPO Reorganization, is a Subsidiary of EnergySolutions and which holds 100% of the equity interests of Duratek and (ii) after the IPO Reorganization, is a direct Subsidiary of Holdco and the direct or indirect owner of
100% of the Equity Interests of EnergySolutions and Duratek. All representations, warranties and covenants herein applicable to Parent shall apply upon the formation of Parent. 
 “Participating Member State” means any member state of the European Community that adopts or had adopted the euro as its lawful currency in
accordance with legislation of the European Community relating to the Economic and Monetary Union. 
 “Participation
Fees” shall have the meaning set forth in Section 2.5(d)(i). 
 “Patriot Act” shall mean the Uniting
and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001, Pub. L. 107-56, signed into law on October 26, 2001. 
 “Payment Date” shall mean, with respect to any Loan, the last day of any Interest Period applicable to such Loan and the date of payment
in full of such Loan. 
 “PBGC” shall mean the Pension Benefit Guaranty Corporation or any successor thereto. 
 “Performance Certificate” shall mean a certificate of an executive officer of EnergySolutions as to its financial performance, in
substantially the form attached as Exhibit C hereto. 
 “Permitted Acquisition” means an Acquisition by
EnergySolutions or any of the Subsidiaries of any Person (i) primarily engaged in a Permitted Business and (ii) who Guarantees the Secured Obligations. 
  

 -22- 

 date thereof, and (b) state that there shall not exist, on the first day of the requested Interest Period, both
before and after giving effect to such request, a Default. 
 “Restricted Payment” shall mean (a) any direct or
indirect cash distribution, cash dividend or other cash payment by Holdco, EnergySolutions, Parent or any of their Subsidiaries to any Person (other than to EnergySolutions or any other Subsidiary) on account of any general or limited partnership
interest in, membership interest in, or ownership of any shares of capital stock or other securities of, EnergySolutions, Parent or any of their Subsidiaries; or (b) any payment by Holdco, EnergySolutions, Parent or any of their Subsidiaries to
a Person other than EnergySolutions, Parent or any of their Subsidiaries under any management or consulting agreement, or other similar agreement or arrangement not entered into in the ordinary course of business. 
 “Restructuring Cost Cap” shall mean $20,000,000 for the four-quarter period ended September 30, 2006. For each successive
four-quarter period thereafter, “Restructuring Cost Cap” shall be reduced by $2,500,000. For the avoidance of doubt, the “Restructuring Cost Cap” shall be $17,500,000 for the four-quarter period ended December 31, 2006 and
$0 for the four-quarter period ended September 30, 2008. 
 “Revolving Commitment” shall mean, with respect to any
Revolving Lender at any time, the amount set forth opposite such Lender’s name on Schedule 4-A hereto under the caption “Revolving Commitment” or, if such Lender has entered into one or more Assignment and Acceptances, set
forth for such Lender in the Register maintained by the Administrative Agent pursuant to Section 11.5(c) as such Lender’s “Revolving Commitment.” 
 “Revolving Issuing Bank” shall mean (i) the Initial Revolving Issuing Bank and any assignee to which a Revolving Letter of Credit
Commitment hereunder has been assigned pursuant to Section 11.5 so long as each such assignee expressly agrees to perform in accordance with their terms all of the obligations that by the terms of this Agreement are required to be
performed by it as the Revolving Issuing Bank and notifies the Administrative Agent of the amount of its Revolving Letter of Credit Commitment (which information shall be recorded by the Administrative Agent in the Register), for so long as the
Initial Revolving Issuing Bank or assignee, as the case may be, shall have a Revolving Letter of Credit Commitment and (ii) with respect to the existing letters of credit set forth on Schedule 1-B hereto, each Lender identified as a
“Revolving Issuing Bank” on such schedule. 
 “Revolving Lender” shall mean a Lender that has a Revolving
Commitment. 
 “Revolving Letter of Credit” shall have the meaning set forth in Section 2.1(c), but shall
include those letters of credit existing on the Second Amendment Effective Date set forth on Schedule 1-B hereto. 
 “Revolving
Letter of Credit Agreement” shall have the meaning set forth in Section 2.2(f)(i). 
 “Revolving Letter of
Credit Commitment” shall mean, with respect to the Revolving Issuing Bank, an amount equal to (i) prior to the deposit of the Synthetic Deposits in the Synthetic Deposit Account pursuant to Section 2.16(b)(i) $35,000,000
and (ii) after such deposit, $10,000,00030,000,000. 
  

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 “Revolving Loans” shall mean, collectively, the amount advanced by the Revolving Lenders
to EnergySolutions under the Revolving Commitment, not to exceed the aggregate amount of the Revolving Commitments. 
 “Revolving
Maturity Date” shall mean June 7, 2011. 
 “Revolving Notes” shall mean those certain revolving promissory
notes in the aggregate original principal amount of (i) prior to the deposit of the Synthetic Deposits in the Synthetic Deposit Account pursuant to Section 2.16(b)(i) $100,000,000 and (ii) after such deposit, $75,000,000, one
issued by EnergySolutions to each of the Revolving Lenders issuing a Revolving Commitment that requests a promissory note, in accordance with each such Revolving Lender’s Revolving Commitment, each one substantially in the form of Exhibit E
attached hereto, and any extensions, modifications, renewals, endorsements or replacements of or amendments to any of the foregoing. 
 “Revolving Notice of Renewal” shall have the meaning set forth in Section 2.1(c).  
 “Revolving Notice of Termination” shall have the meaning set forth in Section 2.1(c). 
 “Rollover Letter of Credit” shall have the meaning set forth in Section 2.17(b). 
 “S&P” shall mean Standard & Poor’s Ratings Services, a division of The McGraw-Hill Companies, Inc., and any successor thereto. 
 “Second Amendment Effective Date” means June 7, 2006. 
 “Second Lien Credit
Agreement” means the Second Lien Credit Agreement, dated as of the First Amendment Effective Date, among EnergySolutions, Holdco, CGMI, Calyon as administrative agent and collateral agent thereunder, and the lenders party thereto, as
amended as of February 1, 2006. 
 “Secured Hedge Agreement” shall mean any Hedge Agreement that is entered into by and
between any Loan Party and any Secured Party. 
 “Secured Obligations” shall mean (a) the Obligations and (b) the
due and punctual payment and performance of all obligations of EnergySolutions and the other Loan Parties under each Hedge Agreement entered into with any counterparty that is a Secured Party. 
 “Secured Parties” shall mean, collectively, the Administrative Agent, each other Agent, the LendersLender
Parties and each counterparty to a Hedge Agreement if at the date of entering into such Hedge Agreement such person was a Lender or an Affiliate of a Lender and such person executes and delivers to the Administrative Agent a letter agreement in
form and substance acceptable to the Administrative Agent pursuant to which such person (i) appoints the Collateral Agent as its agent under the applicable Loan Documents and (ii) agrees to be bound by the provisions of Sections
11.2 and 11.9 as if it were a Lender. 
 “Security Agreements” shall mean the EnergySolutions Security Agreement,
the Subsidiary Security Agreement, the Holdco Security Agreement and any additional security agreement substantially 
  

 -28- 

 “Synthetic Deposit Sub-Account” shall have the meaning set forth in
Section 2.16(a). 
 “Synthetic Deposit Return” shall have the meaning set forth in Section 2.16(d).

 “Synthetic Facility Availability Date” shall mean any Business Day on or after the establishment of the Synthetic Deposit
Account pursuant to Section 2.16(a). On such date, after giving effect to any Rollover Letters of Credit being deemed Synthetic Letter of Credit hereunder, the Available Amount for all Revolving Letters of Credit shall not exceed
$10,000,00030,000,000. 
 “Synthetic Facility Available Amount” shall mean $25,000,000 less
(i) the aggregate amount of all Synthetic Deposits returned to Lenders pursuant to Section 2.7 and (ii) the Dollar Equivalent of the amount of unreimbursed Disbursements in accordance with Section 2.16(c)(i).

 “Synthetic Issuing Bank” shall mean the Initial Synthetic Issuing Bank and any other Person deemed to be a Synthetic
Issuing Bank pursuant to Section 2.17(b) and any assignee (i) consented to by the Administrative Agent and EnergySolutions (each such consent not to be unreasonably withheld or delayed) and (ii) to which a Synthetic Deposit
hereunder has been assigned pursuant to Section 11.5 so long as each such assignee expressly agrees to perform in accordance with their terms all of the obligations that by the terms of this Agreement are required to be performed by it
as the Synthetic Issuing Bank and notifies the Administrative Agent of the amount of its Synthetic Deposit (which information shall be recorded by the Administrative Agent in the Register), for so long as the Initial Synthetic Issuing Bank or
assignee, as the case may be, shall have a Synthetic Deposit. 
 “Synthetic Lender” shall mean, as of any time of
determination, any Lender which has a Synthetic Deposit Percentage greater than 0%. 
 “Synthetic Letter of Credit” shall
have the meaning set forth in Section 2.17(a). 
 “Synthetic Letter of Credit Agreement” shall have the meaning
set forth in Section 2.2(f)(i). 
 “Synthetic Letter of Credit Commitment” shall mean the Synthetic Issuing
Bank’s obligation to issue Synthetic Letters of Credit pursuant to Section 2.17(a) and, with respect to each Synthetic Lender, such Lender’s Synthetic Letter of Credit Participation Obligation. 
 “Synthetic Letter of Credit Maturity Date” shall mean June 7, 2013. 
 “Synthetic Letter of Credit Outstandings” shall mean, at any time of determination, the sum of (i) the aggregate Available Amount
of all issued and outstanding Synthetic Letters of Credit plus (ii) all outstanding Synthetic Reimbursement Obligations. 
 “Synthetic Letter of Credit Participation Obligation” shall have the meaning set forth in Section 2.17(c). 
 “Synthetic Notice of Renewal” shall have the meaning set forth in Section 2.17(a). 
 “Synthetic Notice of Termination” shall have the meaning set forth in Section 2.17(a). 
  

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 Section 1.5 Pro Forma Calculations. 
 For purposes of computing each of the Leverage Ratio and the Interest Coverage Ratio for any purpose hereunder, such ratio (and any financial calculations
or components required to be made or included therein) shall be determined, with respect to the relevant period, after giving pro forma effect to the Duratek Acquisition, each Permitted Acquisition and disposition of a Person, line of business or
division consummated during such period (including, in each case, any incurrence, assumption, refinancing or repayment of Indebtedness for Money Borrowed), as if such Duratek Acquisition, Permitted Acquisition, disposition or related transactions
had been consummated on the first day of such period, in each case, either (i) prepared in accordance with Regulation S-X under the Securities Act of 1933, as amended, or (ii)(a) that have been certified by a financial officer of
EnergySolutions as having been prepared in good faith based upon reasonable assumptions and (b) are reasonably acceptable to the Administrative Agent. 
 ARTICLE 2. 
 Loans and Letters of Credit 
 Section 2.1 The Loans and the Letters of Credit. 
 (a) The Revolving Loans. The Revolving Lenders agree, severally in accordance with their respective Revolving Commitments and not jointly, upon the terms and subject to the conditions of this Agreement, to lend
and relend to EnergySolutions, on and after the Agreement Date and prior to the Revolving Maturity Date, amounts requested by EnergySolutions which, in the aggregate, do not exceed at any time the aggregate Revolving Commitments; provided
that no Loan may be made at any time under this Section 2.1(a) in an amount that shall exceed the aggregate Unused Revolving Commitments at such time. Loans under the Revolving Commitment may be repaid and reborrowed as provided in
Section 2.2 hereof. 
 (b) The Term Loans. The Lenders who have agreed to make Term Loans agree, severally in accordance
with their respective Term Commitments as set forth on Schedule 4-B hereof and not jointly, upon the terms and subject to the conditions of this Agreement, to lend to EnergySolutions, on the Second Amendment Effective Date, an aggregate
amount equal to $530,000,000. After the Second Amendment Effective Date, the Term Loans will bear interest at the Eurodollar Basis or the Base Rate Basis as provided in Section 2.2 hereof. Amounts borrowed under this
Section 2.1(b) and repaid or prepaid may not be reborrowed. 
 (c) Revolving Letters of Credit. The Revolving Issuing Bank
agrees, on the terms and conditions hereinafter set forth, to issue (or cause any of its Affiliates that is a commercial bank to issue on its behalf) standby letters of credit (each a “Revolving Letter of Credit”) in Dollars or
any Available Foreign Currency for the account of EnergySolutions or any of the Subsidiaries from time to time on any Business Day during the period from the Agreement Date until 5 days before the Revolving Maturity Date in an aggregate
Available Amount (i) for all Revolving Letters of Credit not to exceed at any time the Revolving Letter of Credit Commitment at such time and (ii) for each such Revolving Letter of Credit not to exceed the aggregate Unused Revolving
Commitments as of the date of issuance thereof. No Revolving Letter of Credit shall have an expiration date later than the earlier of (i) one year after the date of issuance thereof, or (ii) five (5) days before the Revolving Maturity
Date, but may by its terms be 
  

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 (f) Issuance of and Drawings and Reimbursement Under Letters of Credit. 
 (i) Request for Issuance. Each Letter of Credit shall be issued upon notice, given not later than 12:30 p.m. (New York time) on the fifth
Business Day prior to the date of the proposed issuance of such Letter of Credit, by EnergySolutions to the applicable Issuing Bank, which shall give to the Administrative Agent and each Revolving Lender (in the case of a request for a Revolving
Letter of Credit) or each Synthetic Lender (in the case of a request for a Synthetic Letter of Credit) prompt notice thereof by telecopier or electronic communication. Each such notice of issuance of a Letter of Credit (a “Notice of
Issuance”) shall be by telephone, confirmed immediately in writing, or telecopier or electronic communication, specifying therein the requested (A) date of such issuance (which shall be a Business Day), (B) Available Amount of
such Letter of Credit (which amount shall not be less than $100,000), (C) expiration date of such Letter of Credit, (D) name and address of the beneficiary of such Letter of Credit and (E) form of such Letter of Credit, and shall be
accompanied by such application and agreement for Letter of Credit as the Issuing Bank may specify to EnergySolutions for use in connection with such requested Letter of Credit (a “Revolving Letter of Credit Agreement” or a
“Synthetic Letter of Credit Agreement,” as applicable). If (x) the requested form of such Letter of Credit is acceptable to the applicable Issuing Bank in its sole discretion, (y) as of the requested date of issuance, the
requirements of Section 2.1(c) or 2.17(a) hereof have been satisfied as to such Letter of Credit, and (z) the applicable Issuing Bank has not received notice of objection to such issuance from the Majority Lenders, the
applicable Issuing Bank will, upon fulfillment of the applicable conditions set forth in Article 3, make such Letter of Credit available to EnergySolutions at its office referred to in Section 11.1 or as otherwise agreed with
EnergySolutions in connection with such issuance. In the event and to the extent that the provisions of any Letter of Credit Agreement shall conflict with this Agreement, the provisions of this Agreement shall govern. 
 (ii) Participations. Upon the issuance of a Revolving Letter of Credit by the Revolving Issuing Bank, the Revolving Issuing Bank shall be deemed,
without further action by any party hereto, to have sold to each Revolving Lender, and each such Revolving Lender shall be deemed, without further action by any party hereto, to have purchased from the Revolving Issuing Bank, a participation in such
Revolving Letter of Credit in an amount for each Revolving Lender equal to the Dollar Equivalent of such Lender’s Pro Rata Share of the Available Amount of such Revolving Letter of Credit, effective upon the issuance of such Revolving
Letter of Credit. In consideration and in furtherance of the foregoing, each Revolving Lender hereby absolutely and unconditionally agrees to pay such Lender’s Pro Rata Share of each L/C Disbursement made by the Revolving Issuing Bank and not
reimbursed by EnergySolutions forthwith on the date due as provided in Section 2.4(c) (or which has been so reimbursed but must be returned or restored by the Revolving Issuing Bank because of the occurrence of an event specified in
Section 8.1(f) or (g) or otherwise) by making available to the Administrative Agent for the account of the Revolving Issuing Bank by deposit to the Administrative Agent’s Account, in same day funds, an amount equal to
the Dollar Equivalent of such Lender’s Pro Rata Share of such L/C Disbursement. Each Revolving Lender acknowledges and agrees that its obligation to acquire participations pursuant to this Section 2.2(f)(ii) in respect of
Revolving Letters of Credit is absolute and unconditional and shall not be affected by any circumstance whatsoever, including the occurrence and continuance of a Default or an Event of Default or the termination of the Commitments, and that each
such payment shall be made without any offset, abatement, withholding or reduction whatsoever. If and to the extent that any Revolving Lender shall not have so made the amount of such L/C Disbursement available to the Administrative Agent, such
Revolving Lender agrees to pay to the Administrative Agent 

  

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forthwith on demand such amount together with interest thereon, for each day from the date such L/C Disbursement is due pursuant to
Section 2.4(c) until the date such amount is paid to the Administrative Agent, at the Federal Funds Rate for its account or the account of the Revolving Issuing Bank, as applicable. If such Lender shall pay to the Administrative Agent
such amount for the account of the Revolving Issuing Bank on any Business Day, such amount so paid in respect of principal shall constitute a Letter of Credit Loan made by such Lender on such Business Day for purposes of this Agreement, and the
outstanding principal amount of the Letter of Credit Loan made by the Revolving Issuing Bank shall be reduced by such amount on such Business Day. 
 (iii) Drawing and Reimbursement. The payment by the Revolving Issuing Bank of a draft drawn under any Revolving Letter of Credit shall constitute for all purposes of this Agreement the making by the Revolving Issuing Bank of a Letter
of Credit Loan, which shall be a Base Rate Option Loan, in the Dollar Equivalent of the amount of such draft. 
 (iv) Letter of
Credit Reports. The Issuing Banks shall furnish (A) to the Administrative Agent on or about the first Business Day of each week a written report summarizing issuance and expiration dates of Letters of Credit issued during the previous week
and drawings during such week under all Letters of Credit, (B) to each Revolving Lender and Synthetic Lender on or about the first Business Day of each month a written report summarizing issuance and expiration dates of Letters of Credit issued
during the preceding month and drawings during such month under all Letters of Credit and (C) to the Administrative Agent and each Revolving Lender on the first Business Day of each calendar quarter a written report setting forth the average
daily aggregate Available Amount during the preceding calendar quarter of all Revolving Letters of Credit. 
 (v) Failure to Make Letter
of Credit Loans. The failure of any Lender to make the Letter of Credit Loan to be made by it on the date specified in Section 2.4(c) shall not relieve any other Lender of its obligation hereunder to make its Letter of Credit Loan on
such date, but no Lender shall be responsible for the failure of any other Lender to make the Letter of Credit Loan to be made by such other Lender on such date. 
 (vi) Applicability of ISP98. Unless otherwise expressly agreed by the applicable Issuing Bank and EnergySolutions when a Letter of Credit is issued, the rules of the “International Standby Practices
1998” published by the Institute of International Banking Law & Practice (or such later version thereof as may be in effect at the time of issuance) shall apply to each Letter of Credit. 
 Section 2.3 Interest. 
 (a) On
Base Rate Option Loans. Interest on each Base Rate Option Loan shall be computed on the basis of a year of 365/366 days for the actual number of days elapsed and shall be payable at the Base Rate Basis for such Base Rate Option Loan, in arrears
on the applicable Payment Date for the period through the date immediately preceding such Payment Date. Interest on Base Rate Option Loans then outstanding shall also be due and payable on the Revolving Maturity Date or Term Loan Maturity Date, as
applicable, with respect to Revolving Loans and Term Loans. 
 (b) On Eurodollar Option Loans. Interest on each Eurodollar Option Loan
shall be computed on the basis of a 360-day year for the actual number of days elapsed and shall be payable at the Eurodollar Basis for such Eurodollar Option Loan, in arrears on the applicable Payment Date for the 
  

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 Notwithstanding anything to the contrary in this Section 2.4(b), any unpaid principal and interest of the
Term Loans shall be due and payable in full on the Term Loan Maturity Date. 
 (c) Letter of Credit Loans. 
 (i) EnergySolutions shall repay to the Administrative Agent for the account of the Revolving Issuing Bank and each other Revolving Lender that has made
a Letter of Credit Loan on the earlier of (1) the Business Day when such Letter of Credit Loan is made, if made on or prior to 2:00 p.m. (New York time), or the succeeding Business Day, if made after 2:00 p.m. (New York time), and (2) the
Revolving Maturity Date, the outstanding principal amount of each Letter of Credit Loan made by each of them; provided that if the repayment of any such Letter of Credit Loan by EnergySolutions is made in respect of a Letter of Credit denominated
in a Available Foreign Currency, such repayment of a Letter of Credit Loan shall include all additional amounts necessary to reimburse the Revolving Issuing Bank or the Revolving Lenders for exchange rate fluctuations such that the total repayment
by EnergySolutions shall, in the reasonable judgment of the Administrative Agent, be equal to the amount of the L/C Disbursement. 
 (ii) The Obligations of EnergySolutions and the Revolving Lenders with respect to Revolving Letters of Credit under this Agreement, any Letter of Credit Agreement and any other agreement or instrument relating to any Revolving Letter of
Credit shall be unconditional and irrevocable, and shall be paid strictly in accordance with the terms of this Agreement, such Letter of Credit Agreement and such other agreement or instrument under all circumstances, including, without limitation,
the following circumstances: 
 (B) any lack of validity or enforceability of any Loan Document, any Letter of Credit
Agreement, any Letter of Credit or any other agreement or instrument relating thereto (all of the foregoing being, collectively, the “L/C Related Documents”); 
 (C) any change in the time, manner or place of payment of, or in any other term of, all or any of the Obligations of EnergySolutions in
respect of any L/C Related Document or any other amendment or waiver of or any consent to departure from all or any of the L/C Related Documents; 
 (D) the existence of any claim, set-off, defense or other right that EnergySolutions may have at any time against any beneficiary or any transferee of a Letter of Credit (or any Persons for which any such beneficiary
or any such transferee may be acting), the Issuing Bank or any other Person, whether in connection with the transactions contemplated by the L/C Related Documents or any unrelated transaction; 
 (E) any statement or any other document presented under a Letter of Credit proving to be forged, fraudulent, invalid or insufficient in
any respect or any statement therein being untrue or inaccurate in any respect; 
 (F) payment by the Issuing Bank under a
Letter of Credit against presentation of a draft, certificate or other document that does not strictly comply with the terms of such Letter of Credit; 
  

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 annum of the face amount of such Letter of Credit, and shall also pay to the Synthetic Issuing Bank customary
commissions, issuance fees, fronting fees, transfer fees and other fees and charges in connection with the issuance, administration, amendment, payment and negotiation of each Synthetic Letter of Credit. Letter of Credit commissions shall be
computed on the basis of a year of 360 days for the actual number of days elapsed. 
 (d) Participation Fees. 
 (i) Upon the deposit of the Synthetic Deposits in the Synthetic Deposit Account, the fees (“Participation Fees”) relative to the
Synthetic Deposits shall accrue at a rate per annum equal to the sum of the Eurodollar Rate for the relevant InvestmentInterest Period plus the Applicable Margin; provided that the amount due and payable by
EnergySolutions under this clause shall be the amount set forth above less the Synthetic Deposit Return payable by the Administrative Agent to the Synthetic Lenders pursuant to Section 2.16(d) for the applicable period. All Synthetic
Deposits shall accrue fees at all times that they are on deposit in the Synthetic Deposit Account. 
 (ii) Participation Fees accrued on
each Synthetic Deposit shall be payable, without duplication: (a) on the Synthetic Letter of Credit Maturity Date, (b) on the date of any return of a Synthetic Deposit pursuant to Section 2.7, on the amount of such deemed
Synthetic Deposits so returned and (c) on the last day of each InvestmentInterest Period. 
 Section 2.6
Optional Prepayments and Application of Prepayments. 
 (a) Optional Prepayment of Loans. Subject to Section 2.6(b),
the principal amount of any Base Rate Option Loan may be prepaid in full or in part at any time, without penalty or premium and without regard to the Payment Date for such Loan, upon not less than one (1) Business Day’s prior written
notice to the Administrative Agent of such prepayment. Subject to Section 2.6(b) and Section 2.11, Eurodollar Option Loans may be prepaid prior to the due date thereof, upon not less than three (3) Business Days’
prior written notice to the Administrative Agent. Partial prepayments shall be in a principal amount of not less than $1,000,000 and in an integral multiple of $500,000. A notice of prepayment shall be irrevocable. 
 (b) Application of Prepayment. Each prepayment of the Term Loans shall be applied (i) first, in direct order of maturities, to the next four
scheduled principal repayment installments of the Term Facility and (ii) second, to the other principal repayment installments of the Term Facility on a pro rata basis. Any prepayment of Revolving Loans shall be applied (A) first, to
prepayment of the Letter of Credit Loans then outstanding until such Loans are paid in full, (B) second, to prepayment of Revolving Loans then outstanding until such Loans are paid in full and (C) third, to be deposited in the L/C
Collateral Account to cash collateralize the aggregate Available Amount of the Revolving Letters of Credit then outstanding. Any prepayment of the Term Facility may not be reborrowed. Any prepayment of Revolving Loans pursuant to this
Section 2.6 shall not reduce the Revolving Commitment. The prepayment of any principal amount of Loans shall be made with accrued interest to the date of such prepayment on the aggregate principal amount prepaid and EnergySolutions shall
reimburse the Lenders and the Administrative Agent, on demand, for any loss or out-of-pocket expense incurred by any Lender Party or the Administrative Agent in connection with such prepayment, as set forth in Section 2.11 hereof. Any
prepayment under this Agreement shall not affect EnergySolutions’ obligation to continue 
  

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 the aggregate Available Amount of all Revolving Letters of Credit outstanding at such time and (iii) the aggregate
amount of all unreimbursed Disbursements in respect of Synthetic Letters of Credit, in repayment or prepayment of such of the outstanding Loans or other Obligations then owing to such Lender Party. 
 (e) Subject to any contrary provisions in the definition of “Interest Period,” if any payment under this Agreement or any of the other Loan
Documents is specified to be made on a day which is not a Business Day, it shall be made on the next Business Day, and such extension of time shall in such case be included in computing interest and fees, if any, in connection with such payment;
provided, however, that, if such extension would cause payment of interest on or principal of Eurodollar Option Loans to be made in the next following calendar month, such payment shall be made on the next preceding Business Day.

 (f) Unless the Administrative Agent shall have received notice from EnergySolutions prior to the date on which any payment is due to any
Lender Party hereunder that EnergySolutions will not make such payment in full, the Administrative Agent may assume that EnergySolutions has made such payment in full to the Administrative Agent on such date and the Administrative Agent may, in
reliance upon such assumption, cause to be distributed to each such Lender Party on such due date an amount equal to the amount then due such Lender Party. If and to the extent EnergySolutions shall not have so made such payment in full to the
Administrative Agent, each such Lender Party shall repay to the Administrative Agent forthwith on demand such amount distributed to such Lender Party together with interest thereon, for each day from the date such amount is distributed to such
Lender Party until the date such Lender Party repays such amount to the Administrative Agent, at the Federal Funds Rate. 
 Section 2.11
Reimbursement. 
 (a) Whenever any Lender shall sustain or incur any losses or out-of-pocket expenses in connection with
(i) failure by EnergySolutions to borrow any Eurodollar Option Loan after having given notice of its intention to borrow in accordance with Section 2.2 hereof (whether by reason of EnergySolutions’ election not to proceed or
the non-fulfillment of any of the conditions set forth in Article 3), or (ii) payment of any Eurodollar Option Loan in whole or in part pursuant to Section 2.2(a)(ii), 2.6, 2.8 10.2 or 10.2
11.25, acceleration of the maturity of the Loans pursuant to Section 8.2 or for any other reason, EnergySolutions agrees to pay to such Lender, upon demand, an amount sufficient to compensate such Lender for all
such losses and reasonable out-of-pocket expenses. Such Lender’s good faith determination of the amount of such losses or out-of-pocket expenses, as set forth in writing pursuant to Section 2.11(b) hereof, and accompanied by
calculations in reasonable detail demonstrating the basis for its demand, shall be presumptively correct, absent manifest error. 
 (b)
Losses subject to reimbursement hereunder shall be (i) any loss incurred by any Lender in connection with the re-employment of funds prepaid, repaid, not borrowed, or paid, as the case may be, and the amount of such loss shall be the excess, if
any, of (1) the interest or other cost to such Lender of the deposit or other source of funding used to make any such Eurodollar Option Loan (but specifically excluding any Applicable Margin) for the remainder of its Interest Period, over
(2) the interest earned (or to be earned) by such Lender upon the re-lending or other redeployment of the amount of such Eurodollar Option Loan for the remainder of its putative Interest Period or (ii) any other expenses 
  

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 amount that is less than the aggregate amount of the Synthetic Letter of Credit Outstandings. 

(iii) Concurrently with the effectiveness of any assignment by any Synthetic Lender of all or any portion of its Synthetic Deposit, the
corresponding portion of the assignor’s Synthetic Deposit Sub-Account shall be transferred from the assignor’s Synthetic Deposit Sub-Account to the assignee’s Synthetic Deposit Sub-Account in accordance with Section 11.5
and, if required by Section 11.5, the Administrative Agent shall close such assignor’s Synthetic Deposit Sub-Account. 
 (iv) Upon the reduction of the Synthetic Facility Available Amount and the Synthetic Letter of Credit Outstandings to zero, all amounts remaining in the Synthetic Deposit Account shall be returned to the Synthetic
Lenders based on such Synthetic Lender’s Synthetic Deposit Percentage. 
 (d) Each of the Issuing Bank and each Synthetic Lender
hereby acknowledges and agrees that theThe Administrative Agent has agreed to invest the Synthetic Deposits as determined by the Borrower and the Administrative Agent so as to earn a return (except during periods when such
Synthetic Deposits are used to cover unreimbursed Disbursements) equal to the Base Return for the relevant Investment Period less an amount equal to 0.15% per annum on such Synthetic Deposits. Onshall invest, or cause to be invested, the
Synthetic Deposit of each Synthetic Lender so as to earn for the account of such Synthetic Lender a return thereon (the “Synthetic Deposit Return”) for each day at a rate per annum equal to (i) the one month LIBOR rate as determined
by the Administrative Agent on such day (or if such day was not a Business Day, the first Business Day immediately preceding such day) based on rates for deposits in dollars (as set forth by Bloomberg L.P.-page BTMM or any other comparable publicly
available service as may be selected by the Administrative Agent) (the “Benchmark LIBO Rate”) minus (ii) 0.15% per annum (based on a 365/366 day year). The Benchmark LIBO Rate will be reset monthly. The Synthetic Deposit Return
accrued through and including the last day of each Interest Period shall be payable by the Administrative Agent to each Synthetic Lender on each day on which Participation Fees are required to be paid with respect to all or any portion of the
Synthetic Deposits pursuant to Section 2.5(d)(ii) and the Administrative Agent shall pay to each Synthetic Lender (an amount (the “Synthetic Deposit Return”) equal to the Base
Return for the relevant Investment Period less an amount equal to 0.15% per annum on such Synthetic Deposits multiplied by (ii) such Synthetic on such Lender’s Synthetic Deposit Percentage Deposits. Any
amounts earned and received with respect to Synthetic Deposits during any applicable Investment Period in excess of the BaseSynthetic Deposit Return shall be for the account of the Administrative Agent. No
Person other than the Administrative Agent shall have any obligation under or in respect of this clause. 
 (e) Notwithstanding anything to
the contrary in this Agreement, EnergySolutions shall not be liable for any losses due to (i) the misappropriation of any BaseSynthetic Deposit Return or Synthetic Deposit or (ii) the failure of the Administrative
Agent to pay the Synthetic Deposit Return to any Synthetic Lender (it being understood and agreed for greater certainty that this clause shall not limit any obligation of EnergySolutions hereunder to pay any Participation Fee). Neither the
Administrative Agent, the Synthetic Issuing Bank, any Loan Party nor any other Person guarantees any rate of return on the investment of any Synthetic Deposit held in the Synthetic Deposit Account. 
  

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 (f) If the Synthetic Issuing Bank is enjoined from taking any action referred to in clause (c) of
this Section 2.16, or if the Synthetic Issuing Bank reasonably determines that, by operation of law, it may reasonably be precluded from taking any such action, or if any Loan Party or Synthetic Lender challenges in any legal proceeding
any of the acknowledgements, agreements or characterizations set forth in any of clause (a) of this Section 2.16, then, in any such case (and so long as such event or condition shall be continuing), and notwithstanding anything
contained herein to the contrary, the Synthetic Issuing Bank shall not be required to issue, renew or extend any Synthetic Letter of Credit. 
 (g) In the event any payment of a Synthetic Reimbursement Obligation shall be required to be refunded by the Synthetic Issuing Bank to EnergySolutions after the return of the Synthetic Deposits to the Synthetic Lenders as permitted
hereunder, each Synthetic Lender agrees to acquire and fund a participation in such refunded amount equal to the lesser of its Synthetic Deposit Percentage hereof and the amount of its Synthetic Deposit that shall have been so returned. 

Section 2.17 Synthetic Letters of Credit. 
 (a) The Synthetic Issuing Bank agrees, on the terms and conditions hereinafter set forth, to issue (or cause any Affiliate that is a commercial bank to issue on its behalf) standby letters of credit (each a
“Synthetic Letter of Credit”) in Dollars or any Available Foreign Currency for the account of EnergySolutions or any of its Subsidiaries from time to time on any Business Day during the period from the Synthetic Facility
Availability Date until 5 days before the Synthetic Letter of Credit Maturity Date; provided that the Synthetic Issuing Bank shall not be permitted or required to issue any Synthetic Letter of Credit or increase the Available Amount of any
existing Synthetic Letter of Credit if, after giving effect thereto, (i) the aggregate amount of all Synthetic Letter of Credit Outstandings would exceed the Synthetic Facility Available Amount or (ii) the aggregate amount of all Synthetic
Letter of Credit Outstandings would exceed the amount on deposit in the Synthetic Deposit Account. No Synthetic Letter of Credit shall have an expiration date later than the earlier of (i) one year after the date of issuance thereof, or
(ii) five (5) days before the Synthetic Letter of Credit Maturity Date, but may by its terms be renewable annually upon written notice (a “Synthetic Notice of Renewal”) given to the Synthetic Issuing Bank that issued such
Synthetic Letter of Credit and the Administrative Agent on or prior to any date for notice of renewal set forth in such Synthetic Letter of Credit but in any event at least 10 Business Days prior to the date of the proposed renewal of such Synthetic
Letter of Credit and upon fulfillment of the applicable conditions set forth in Article 3 unless the Synthetic Issuing Bank has notified EnergySolutions (with a copy to the Administrative Agent) on or prior to the date for notice of
termination set forth in such Synthetic Letter of Credit but in any event at least 5 Business Days prior to the date of automatic renewal of its election not to renew such Synthetic Letter of Credit (a “Synthetic Notice of
Termination”); provided that the terms of each Synthetic Letter of Credit that is automatically renewable annually shall (x) require the Synthetic Issuing Bank that issued such Synthetic Letter of Credit to give the beneficiary
named in such Synthetic Letter of Credit notice of any Synthetic Notice of Termination, (y) permit such beneficiary, upon receipt of such notice, to draw under such Synthetic Letter of Credit prior to the date such Synthetic Letter of Credit
otherwise would have been automatically renewed and (z) not permit the expiration date (after giving effect to any renewal) of such Synthetic Letter of Credit in any event to be extended to a date later than 5 days before the Term Loan Maturity
Date. If either a Synthetic Notice of Renewal is not given by EnergySolutions or a Synthetic Notice of Termination is given by the Synthetic Issuing Bank pursuant to the immediately preceding sentence, such Synthetic Letter of Credit shall expire on
the date on which it otherwise would have been automatically 

  

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renewed. Within the limits of the Synthetic Facility Available Amount, and subject to the limits referred to above, EnergySolutions may request the issuance
of Synthetic Letters of Credit under this Section 2.17(a) and request the issuance of additional Synthetic Letters of Credit under this Section 2.17(a). 
 (b) Schedule 2.17(b) contains a description of certain letters of credit issued for the account of EnergySolutions and/or one or more of its
Subsidiaries and outstanding on the Second Amendment Effective Date. Each such letter of credit, including any extension or renewal thereof (each, as amended from time to time in accordance with the terms thereof and hereof, an “Existing
Letter of Credit”) shall constitute a “Synthetic Letter of Credit” for all purposes of this Agreement issued on the Second Amendment Effective Date. In addition, on (i) any date after the Second Amendment Effective Date on
which any financial institution or other Person becomes a Lender hereunder, with the consent of EnergySolutions, the Administrative Agent and such Lender, any letters of credit issued by such Lender for the account of EnergySolutions and/or one or
more of its Subsidiaries may be designated as Existing Letters of Credit (ii) the date of deposit of Synthetic Deposits into the Synthetic Account pursuant to Section 2.16(b)(i), any Revolving Letters of Credit (such letters of
credit, the “Rollover Letters of Credit”) may be designated by EnergySolutions as Existing Letters of Credit and, in each case, if any such letters of credit are so designated, Schedule 2.17(b) shall be deemed amended to
include same and same shall constitute “Synthetic Letters of Credit” for all purposes of this Agreement, issued on the date of such designation. Any Lender hereunder to the extent it has issued a Rollover Letter of Credit or an Existing
Letter of Credit shall constitute a “Synthetic Issuing Bank” for all purposes of this Agreement. 
 (c) Participations. Upon
the issuance of each Synthetic Letter of Credit or an increase in the Available Amount thereof, and without further action, each Synthetic Lender shall be deemed to have irrevocably purchased, to the extent of its Synthetic Deposit Percentage, a
participation interest in such Synthetic Letter of Credit, including any contingent liability or Synthetic Reimbursement Obligation created as a result of any issuance thereof or Disbursement with respect thereto (each, a “Synthetic Letter
of Credit Participation Obligation”). Each Synthetic Lender’s Synthetic Letter of Credit Participation Obligation shall be cash collateralized (as provided in Section 2.16), in favor of the Synthetic Issuing Bank, by such
Synthetic Lender’s Synthetic Deposit. Such Synthetic Lender’s Synthetic Deposit shall be available for withdrawal by the Administrative Agent, in the amounts contemplated by and otherwise in accordance with Section 2.16(c)(i),
to reimburse the Synthetic Issuing Bank for Synthetic Reimbursement Obligations. 
 (d) Reimbursement. If any draft is paid under a
Synthetic Letter of Credit (each such payment, a “Disbursement”), EnergySolutions shall reimburse the Synthetic Issuing Lender by payment to the Administrative Agent for the amount of (a) the Dollar Equivalent of the
draft so paid and (b) any taxes, fees, charges or other costs or expenses incurred by the Synthetic Issuing Lender (including, with respect to Letters of Credit denominated in an Available Foreign Currency, costs relating to foreign
currency fluctuations, such that the total repayment by EnergySolutions shall, in the reasonable judgment of the Administrative Agent, be equal to the amount of the Disbursement) in connection with such payment, not later than 2:00 p.m., New
York City time, on the Business Day on which EnergySolutions receives notice of such draft. Each such payment shall be made to the Administrative Agent in Dollars and in immediately available funds. If EnergySolutions fails to reimburse the
Synthetic Issuing Lender at the time and place and in the manner described above in this Section 2.17(d), the Administrative Agent, on behalf of the Synthetic Issuing Lender, shall withdraw from the Synthetic Deposit Account an amount
equal to the Dollar Equivalent of the amount of such unreimbursed payment. Interest shall be payable on 

  

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any such amountsamount, and such amount shall constitute a Loan hereunder, from the date the relevant draft is paid until payment in
full at the Eurodollar Basis (with a Eurodollar Period of one month). Drawings under a Synthetic Letters of Credit shall be deemed to be reimbursed to the extent funds on deposit in the Synthetic Deposit Account are withdrawn and applied thereto in
accordance with Section 2.16(c)(i). The obligation (a “Synthetic Reimbursement Obligation”) of EnergySolutions under this Section 2.17(d) to reimburse, without duplication, the Synthetic Issuing Lender with
respect to each Disbursement (including interest thereon) and the right of the Synthetic Issuing Lender to be paid with amounts on deposit in the Synthetic Deposit Account pursuant to Section 2.16(d)(i), shall be unconditional and
irrevocable, and shall be paid strictly in accordance with the terms of this Agreement, such Letter of Credit Agreement and such other agreement or instrument under all circumstances, including, without limitation, the following circumstances:

 (B) any lack of validity or enforceability of any L/C Related Documents; 
 (C) any change in the time, manner or place of payment of, or in any other term of, all or any of the Obligations of EnergySolutions in
respect of any L/C Related Document or any other amendment or waiver of or any consent to departure from all or any of the L/C Related Documents; 
 (D) the existence of any claim, set-off, defense or other right that EnergySolutions may have at any time against any beneficiary or any transferee of a Synthetic Letter of Credit (or any Persons for which any such
beneficiary or any such transferee may be acting), the Synthetic Issuing Bank or any other Person, whether in connection with the transactions contemplated by the L/C Related Documents or any unrelated transaction; 
 (E) any statement or any other document presented under a Synthetic Letter of Credit proving to be forged, fraudulent, invalid or
insufficient in any respect or any statement therein being untrue or inaccurate in any respect; 
 (F) payment by the
Synthetic Issuing Bank under a Synthetic Letter of Credit against presentation of a draft, certificate or other document that does not strictly comply with the terms of such Synthetic Letter of Credit; 
 (G) any exchange, release or non-perfection of any Collateral or other collateral, or any release or amendment or waiver of or consent to
departure from any Guaranty or any other guarantee, for all or any of the Obligations of EnergySolutions in respect of the L/C Related Documents; or 
 (H) any other circumstance or happening whatsoever, whether or not similar to any of the foregoing, including, without limitation, any other circumstance that might otherwise constitute a defense available to, or a
discharge of, EnergySolutions or any Guarantor. 
 Section 2.18 Termination and Reduction of Commitments. 
 (a) Termination of Commitments. The Term Commitments shall automatically terminate at 5:00 p.m., New York City time, on the Second Amendment
Effective Date. The Revolving Commitments and the Revolving Letter of Credit Commitments shall automatically terminate on the 
  

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 this Agreement unless it has been recorded in the Register as provided in this paragraph. In connection with each
assignment of Synthetic Deposits, the Synthetic Deposit of the assignor Lender shall not be released, but shall instead be purchased by the relevant assignee and continue to be held for application (to the extent not already applied) in accordance
with Article II to satisfy such assignee’s obligations in respect of Synthetic Deposit Letters of Credit. Each Synthetic Lender agrees that immediately prior to each assignment by a Synthetic Lender (i) the Administrative Agent shall
establish a new Synthetic Deposit Sub-Account in the name of the assignee, (ii) unless otherwise consented to by the Administrative Agent, a corresponding portion of the Synthetic Deposit credited to the Synthetic Deposit Sub-Account of the
assignor Lender shall be purchased by the assignee and shall be transferred from the assignor’s Synthetic Deposit Sub-Account to the assignee’s Synthetic Deposit Sub-Account and (iii) if after giving effect to such assignment the
Synthetic Deposit of the assignor Lender shall be zero, the Administrative Agent shall close the Synthetic Deposit Sub-Account of such assignor Lender. 
 (d) Notwithstanding anything to the contrary contained in this Section 11.5, any Lender that is a fund that invests in bank loans may (without the consent of EnergySolutions or the Administrative Agent)
pledge all or a portion of its rights in connection with this Agreement to the trustee or any holder of obligations or agents therefor owed, or securities issued, by such fund as security for such obligations or securities; provided that
such trustee shall not be entitled to exercise any of the rights of a Lender Party under the Loan Documents, even though such trustee may have acquired ownership rights with respect to the pledged interest through foreclosure or otherwise.
No pledge described in the immediately preceding sentence shall release any such Lender from its obligations hereunder. 
 (e) The Revolving
Issuing Bank may assign to an assignee all of its rights and obligations under the undrawn portion of its Revolving Letter of Credit Commitment at any time; provided, however, that (i) each such assignment shall be made in
accordance with clause (A) of the second proviso in Section 11.5(b) and (ii) the parties to each such assignment shall execute and deliver to the Administrative Agent, for its acceptance and recording in the Register, an
Assignment and Acceptance, together with a processing and recordation fee of $3,500. The Revolving Issuing Bank shall promptly notify EnergySolutions of such Assignment. 
 (f) Except as specifically set forth in Section 11.5(b) hereof, nothing in this Agreement or any Notes, express or implied, is intended to or shall confer on any Person other than the respective parties
hereto and thereto and their successors and assignees permitted hereunder and thereunder any benefit or any legal or equitable right, remedy or other claim under this Agreement or any Notes. 
 (g) The provisions of this Section 11.5 shall not apply to any purchase of participations among the Lenders pursuant to
Section 2.12 hereof. 
 (h) Notwithstanding anything to the contrary contained herein, any Lender Party (a “Granting
Lender”) may grant to a special purpose funding vehicle identified as such in writing from time to time by the Granting Lender to the Administrative Agent and EnergySolutions (a “Conduit Lender”) the option to provide all
or any part of any Loan that such Granting Lender would otherwise be obligated to make pursuant to this Agreement; provided that (i) nothing herein shall constitute a commitment by any Conduit Lender to fund any Loan, and (ii) if a
Conduit Lender elects not to exercise such option or otherwise fails to make all or any part of such Loan, the Granting Lender shall be obligated to make such Loan pursuant to the terms hereof. The making of a Loan by a Conduit Lender hereunder
shall utilize the 
  

 -121- 

 HAVE ANY LIABILITY TO ENERGYSOLUTIONS, ANY LENDER OR ANY OTHER PERSON OR ENTITY FOR DAMAGES OF ANY KIND, INCLUDING,
WITHOUT LIMITATION, DIRECT OR INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSSES OR EXPENSES (WHETHER IN TORT, CONTRACT OR OTHERWISE) ARISING OUT OF ENERGYSOLUTIONS’ OR THE ADMINISTRATIVE AGENT’S TRANSMISSION OF COMMUNICATIONS
THROUGH THE INTERNET, EXCEPT TO THE EXTENT THE LIABILITY OF ANY AGENT PARTY IS FOUND IN A FINAL NON-APPEALABLE JUDGMENT BY A COURT OF COMPETENT JURISDICTION TO HAVE RESULTED PRIMARILY FROM SUCH AGENT PARTY’S GROSS NEGLIGENCE OR WILLFUL
MISCONDUCT. 
 The Administrative Agent agrees that the receipt of the Communications by the Administrative Agent at its e-mail address
set forth above shall constitute effective delivery of the Communications to the Agent for purposes of the Loan Documents. Each Lender agrees that notice to it (as provided in the next sentence) specifying that the Communications have been posted to
the Platform shall constitute effective delivery of the Communications to such Lender for purposes of the Loan Documents. Each Lender agrees to notify the Administrative Agent in writing (including by electronic communication) from time to time of
such Lender’s e-mail address to which the foregoing notice may be sent by electronic transmission and (ii) that the foregoing notice may be sent to such e-mail address. 
 Nothing herein shall prejudice the right of the Administrative Agent or any Lender to give any notice or other communication pursuant to any Loan
Document in any other manner specified in such Loan Document. 
 Section 11.24 Holdco Release. 
 Upon the consummation of the IPO Reorganization, Holdco shall be released from its obligations under the Loan Documents, all representations, warranties
and covenants applicable to Holdco shall cease to be in effect and Holdco shall be released from this Agreement, and the Holdco Guaranty, the Holdco Pledge and the Holdco Security Agreement shall be terminated (and the Collateral Agent shall execute
all documents reasonably requested by EnergySolutions confirming the same) so long as (i) Parent, EnergySolutions and the Subsidiaries have complied with their obligations under Section 5.18 of the Credit Agreements and (ii) all
Pledged Equity Interests (as defined in all Pledge Agreements existing prior to the IPO Reorganization other than the Holdco Pledge Agreement) have been pledged to the Collateral Agent for the benefit of the Secured Parties pursuant to the other
Pledge Agreements. 
 Section 11.25 Conversion of Currencies. 
 (i) If, for the purpose of obtaining judgment in any court, it is necessary to convert a sum owing hereunder in one currency into
another currency, each party hereto agrees, to the fullest extent that it may effectively do so, that the rate of exchange used shall be that at which in accordance with normal banking procedures in the relevant jurisdiction the first currency could
be purchased with such other currency on the Business Day immediately preceding the day on which final judgment is given. 
 (ii) The obligations of EnergySolutions in respect of any sum due to any party hereto or any holder of the obligations owing hereunder (the “Applicable Creditor”) shall, 

  

 -129- 

 
notwithstanding any judgment in a currency (the “Judgment Currency”) other than the currency in which such sum is stated to be due hereunder
(the “Agreement Currency”), be discharged only to the extent that, on the Business Day following receipt by the Applicable Creditor of any sum adjudged to be so due in the Judgment Currency, the Applicable Creditor may in accordance with
normal banking procedures in the relevant jurisdiction purchase the Agreement Currency with the Judgment Currency; if the amount of the Agreement Currency so purchased is less than the sum originally due to the Applicable Creditor in the Agreement
Currency, EnergySolutions agrees, as a separate obligation and notwithstanding any such judgment, to indemnify the Applicable Creditor against such loss. The obligations of EnergySolutions contained in this Section 11.25 shall survive
the termination of this Agreement and the payment of all other amounts owing hereunder. 
 (iii) For purposes of this
Agreement, the Dollar Equivalent of the Available Amount of any Letter of Credit shall be calculated on the date when such Letter of Credit is issued, on the first Business Day of each month and at such other times as designated by the
Administrative Agent. Such Dollar Equivalent shall remain in effect until the same is recalculated by the Administrative Agent as provided above and notice of such recalculation is received by EnergySolutions, it being understood that until such
notice is received, the Dollar Equivalent shall be as last reported by the Administrative Agent to EnergySolutions. The Administrative Agent shall promptly notify EnergySolutions of each such determination of Dollar Equivalents. 
 (iv) On each date when the sum of (a) the aggregate principal amount of the Revolving Loans outstanding at such time, (b) the
aggregate Available Amount of all Revolving Letters of Credit outstanding at such time and (c) the aggregate Unused Revolving Commitments at such time exceeds the Revolving Credit Commitment, EnergySolutions shall (i) repay the Revolving
Loans or (ii) cash collateralize all issued and outstanding Revolving Letters of Credit, in each case in an aggregate amount equal to such excess. 
 ARTICLE 12. 
 Waiver of Jury Trial 
 Section 12.1 Waiver of Jury Trial. 
 EACH PARTY HERETO IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO ANY OF THE LOAN DOCUMENTS, THE LOANS, THE LETTERS OF
CREDIT OR THE ACTIONS OF ANY AGENT OR ANY LENDER PARTY IN THE NEGOTIATION, ADMINISTRATION, PERFORMANCE OR ENFORCEMENT THEREOF. 
 [REMAINDER
OF PAGE INTENTIONALLY LEFT BLANK] 
  

 -130- 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed and delivered as of
the date first appearing above. 
  

			
	 ENERGYSOLUTIONS, LLC,

	a Utah limited liability company
		
	By:	 	  

		 	R Steve Creamer,
		 	President and Chief Executive Officer
	
	Taxpayer Identification Number: 14-1921823
	
	Address of Principal Place of Business:
	423 West 300 South
	Salt Lake City, Utah 84101

  

			
	STATE OF UTAH	  	)
		  	)
	COUNTY OF SALT LAKE	  	 )

 On the day of June     , in the year 2006, before me, the undersigned
personally known to me or proved to me on the basis of satisfactory evidence to be the individual whose name is subscribed to the instrument, personally appeared and acknowledged to me that he or she executed the same in his or her capacity, and
that by his or her signature on the instrument the individual, or the person or entity upon behalf of which the individual acted, executed the instrument. 
  

			
	  

	 Notary
	 	
	[Notarial Seal]

 [signatures continue on the following pages] 
  

 S-1Second Amendment to Second Amended and Restated Credit Agreement

 Exhibit 10.3 
 AMENDMENT NO. 2, dated as of February 9, 2007 (this “Amendment”), to the Second Amended and Restated Credit Agreement, dated as of January 31, 2005, as first amended and restated as
of April 13, 2005, as further amended restated as of June 7, 2006, as amended to the date hereof (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Credit Agreement”;
capitalized terms used but not otherwise defined herein shall have the respective meanings ascribed to such terms in the Credit Agreement), by and among ENERGYSOLUTIONS, LLC (f/k/a/ Envirocare of Utah, LLC), a Utah limited liability company
(“EnergySolutions”), ENV HOLDINGS LLC, the other Loan Parties from time to time signatory thereto, CITICORP NORTH AMERICA, INC., as administrative agent (in such capacity, the “Administrative Agent”) and the other
Agents and Lenders from time to time party thereto. 
 WHEREAS, EnergySolutions, LLC has requested that the Lenders amend the Credit
Agreement to provide for the extension of additional commitments to make Synthetic Deposits of $75.0 million on the date hereof; 
 NOW,
THEREFORE, in consideration of the premises and covenants contained herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound hereby, agree
as follows: 
 1. Definitions 
 “Synthetic A Deposit Commitment” shall mean, with respect to any Person at any time, the amount set forth opposite such Person’s name on Schedule 1 hereto. On the Amendment Effective Date, the aggregate
Synthetic A Deposit Commitments shall be $75.0 million. 
 2. Amendments 
 (a) Section 1.1: Defined Terms 
 Section 1.1 of the Credit Agreement is hereby amended by replacing the following definition in its entirety as set forth below: 
 “Synthetic Facility Available Amount” shall mean $100,000,000 less (i) the aggregate amount of all Synthetic Deposits returned to Lenders pursuant to Section 2.7 and (ii) the Dollar Equivalent
of the amount of unreimbursed Disbursements in accordance with Section 2.16(c)(i). 
 (b) Section 11.5
Binding Effect and Assignment 
 Section 11.5(b) of the Credit Agreement is hereby amended by adding the following parenthetical
after each instance of the term “Synthetic Deposits” in the last two sentences of such section: (other than Synthetic A Deposits) (as defined in this Amendment No. 2). 

 (c) Exhibit P — Form of Assignment and Acceptance 
 Exhibit P shall be amended to give effect to the change set forth in Section 2(b) of this Amendment and shall be in the form attached as Annex 1
hereto. 
 3. Synthetic A Deposits 
 On the Amendment Effective Date (as defined below), each Person with a Synthetic A Deposit Commitment shall deposit in the Synthetic Deposit Account (via the Administrative Agent) an amount in Dollars equal to such
Person’s Synthetic A Deposit Commitment. Thereafter, such Synthetic Deposits, together with all Synthetic Deposits previously deposited in the Synthetic Deposit Account, shall be available, on the terms and subject to the conditions set forth
in the Credit Agreement, for application pursuant to Section 2.16(d)(i), to reimburse such Lender’s Synthetic Deposit Percentage of Disbursements that are not reimbursed by EnergySolutions. 
 Upon the deposit of the Synthetic A Deposits into the Synthetic Account, each Synthetic Lender making a Synthetic A Deposit shall be deemed to have
irrevocably purchased from the existing Synthetic Lenders, to the extent of its Synthetic Deposit Percentage (calculated after giving effect to the making of the Synthetic A Deposits), a participation interest in each outstanding Synthetic Letter of
Credit, including any contingent liability or Synthetic Letter of Credit Participation Obligation. 
 For the purposes of calculating
Participation Fees payable by EnergySolutions pursuant to Section 2.5(d), the Administrative Agent shall distinguish in the Register between the initial Synthetic Deposits made on the Synthetic Facility Availability Date and the Synthetic A
Deposits made on the Amendment Effective Date. Except as specifically set forth herein, Synthetic A Deposits shall be Synthetic Deposits for all purposes under the Credit Agreement. 
 4. Representations and Warranties 
 EnergySolutions represents and warrants to the Lenders as of the date hereof that: 
 (a) The execution and delivery
of this Amendment by EnergySolutions has been duly authorized. 
 (b) Neither the execution or delivery by EnergySolutions of
this Amendment, nor compliance by it with the terms and provisions hereof will, (i) violate any Applicable Law respecting Holdco, EnergySolutions, Parent or their Subsidiaries or (ii) conflict with, result in a breach of or constitute a
default under the certificate or articles of incorporation or by-laws, operating agreement or the partnership agreement, as the case may be, as such documents are amended, of Holdco, of EnergySolutions, of Parent or of any of their Subsidiaries, or
under any material indenture, agreement, or other instrument, to which Holdco, EnergySolutions, Parent or any of their Subsidiaries is a party or by which any of them or their respective properties may be bound. 

 (c) Before and after giving effect to this Amendment, the representations and warranties
set forth in the Credit Agreement are true and correct in all material respects with the same effect as if made on the date hereof, except to the extent such representations and warranties expressly relate to an earlier date in which case they shall
be true and correct in all material respects as of such earlier date. 
 (d) At the time of and after giving effect to this
Amendment, no Default or Event of Default has occurred and is continuing. 
 (e) On the date hereof immediately prior to the
deposit of the Synthetic A Deposits as set forth in Section 2, there are no unreimbursed Disbursements and the aggregate principal amount of Synthetic Deposits in the Synthetic Deposit Account is equal to $25.0 million. 
 5. Conditions to Effectiveness. This Amendment shall become effective on the date (the “Amendment Effective Date”) on
which each of the following conditions is satisfied: 
 (a) The Administrative Agent (or its counsel) shall have received:

 (i) from Lenders constituting the Majority Lenders and each of the other parties hereto either (i) a counterpart of
this Amendment signed on behalf of such party or (ii) written evidence satisfactory to the Administrative Agent (which may include telecopy transmission of a signed signature page of this Amendment) that such party has signed a counterpart of
this Amendment; 
 (ii) a duly executed Synthetic Request of EnergySolutions substantially in the form of Exhibit D or as
reasonably acceptable to the Administrative Agent; 
 (iii) the loan certificate of EnergySolutions, in substantially the form
of Exhibit L, including a certificate of incumbency with respect to each Authorized Signatory, together with appropriate attachments which shall include without limitation, the following items: (A) a copy of the Articles of Organization
of EnergySolutions, certified to be true, complete and correct by the Utah Department of Commerce, and a true, complete and correct copy of the operating agreement of EnergySolutions, (B) certificates of good standing for EnergySolutions issued
by the Secretary of State or similar state official for each state in which EnergySolutions is required to qualify or has qualified to do business, and (C) a true, complete and correct copy of the appropriate authorizing resolutions of
EnergySolutions, authorizing EnergySolutions to execute, deliver and perform this Agreement and the other Loan Documents to which it is a party; 
 (iv) the results of a recent lien search in each relevant jurisdiction (including, without limitation, in the United States Patent and Trademark Office and the United States Copyright Office) with respect to
EnergySolutions and each Guarantor, 

 
and such search shall reveal no liens on any of the outstanding shares issued by EnergySolutions and no liens on any of the assets of EnergySolutions or any
Guarantor reasonably requested, other than liens permitted by the Loan Documents; 
 (v) legal opinions of (i) Weil,
Gotshal & Manges LLP, counsel to EnergySolutions, and (ii) Parr Waddoups Brown Gee & Loveless, Utah counsel to EnergySolutions; each as counsel to EnergySolutions and its Subsidiaries, addressed to each Lender, the
Administrative Agent and the Collateral Agent, in form and substance reasonably satisfactory to the Arranger and its counsel, and dated as of the Amendment Effective Date; 
 (vi) all other documents and other instruments as were provided in connection with the closing of the Credit Agreement. 
 (b) All corporate and other proceedings, if any, taken or to be taken in connection with this Amendment and all documents incidental
thereto, whether or not referred to herein, shall be satisfactory in form and substance to the Administrative Agent and its counsel. 
 (c) The Administrative Agent and the Lead Arranger shall have received all reasonable costs, fees, expenses and other amounts due and payable on or prior to the Amendment Effective Date, including reimbursement or payment of all
out-of-pocket expenses (including the reasonable fees, disbursements and other charges of Cahill Gordon & Reindel LLP, counsel for the Lead Arranger) required to be reimbursed or paid by EnergySolutions, and for which invoices have been
presented to EnergySolutions on or prior to the business day prior to the Amendment Effective Date. 
 (d) All other
conditions precedent set forth in Section 3.2 of the Credit Agreement shall be satisfied. 
 6. Reference to the Effect on the
Loan Documents. 
 (a) As of the Amendment Effective Date, each reference in the Credit Agreement to “this
Agreement,” “hereunder,” “hereof,” “herein,” or words of like import, and each reference in the other Loan Documents to the Credit Agreement (including, without limitation, by means of
words like “thereunder”, “thereof” and words of like import), shall mean and be a reference to the Credit Agreement, as amended hereby, and this Amendment and the Credit Agreement shall be read together and
construed as a single instrument. 
 (b) Except as expressly amended hereby or specifically waived above, all of the terms and
provisions of the Credit Agreement and all other Loan Documents are and shall remain in full force and effect and are hereby ratified and confirmed. 
 (c) The execution, delivery and effectiveness of this Amendment shall not, except as expressly provided herein, operate as a waiver of any right, power or remedy 

 
of the Lenders, the Borrower or the Administrative Agent under any of the Loan Documents, nor constitute a waiver or amendment of any other provision of any
of the Loan Documents or for any purpose except as expressly set forth herein. 
 (d) This Amendment is a Loan Document.

 7. Roles. Citigroup Global Markets Inc. shall act in the capacities as Lead Arranger (the “Lead Arranger”)
and Syndication Agent with respect to this Amendment, but in such capacities shall not have any obligations, duties or responsibilities, nor shall incur any liabilities, under this Amendment or any other Loan Document. 
 8. Counterparts. This Amendment may be executed in any number of counterparts and by different parties hereto on separate
counterparts, each of which when so executed and delivered shall be deemed to be an original, but all of which when taken together shall constitute a single instrument. Delivery of an executed counterpart of a signature page of this Amendment by
facsimile transmission shall be effective as delivery of a manually executed counterpart hereof. 
 9. Applicable Law. THIS
AGREEMENT SHALL BE GOVERNED BY, CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 10.
Severability. 
 The fact that any term or provision of this Agreement is held invalid, illegal or unenforceable as to any person
in any situation in any jurisdiction shall not affect the validity, enforceability or legality of the remaining terms or provisions hereof or the validity, enforceability or legality of such offending term or provision in any other situation or
jurisdiction or as applied to any person. 
 11. Headings. The headings of this Amendment are for purposes of reference
only and shall not limit or otherwise affect the meaning hereof. 
 12. Affirmations. 
 (a) EnergySolutions (i) expressly acknowledges the terms of the Credit Agreement, as amended by this Amendment No. 2,
(ii) ratifies and affirms its obligations under the Loan Documents (including but not limited to security documents and guarantees) executed by it and (iii) acknowledges, renews and extends its continued liability under all such Loan
Documents and agrees such Loan Documents remain in full force and effect. 
 (b) EnergySolutions hereby reaffirms, as of the
date hereof, (i) the covenants and agreements contained in each Loan Document to which it is a party, including, in each case, such covenants and agreements as in effect immediately after giving effect to this Amendment and the transactions
contemplated hereby, and (ii) the Lien on the Collateral securing payment of the Obligations (including, without limitation, the Synthetic A Deposits) pursuant to the Security Documents. 

 (c) EnergySolutions represents and warrants that, immediately after giving effect to this
Amendment, each Loan Document, in each case as modified by this Amendment, is enforceable against it in accordance with its terms (except, in any case, as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization or
similar laws affecting creditors’ rights generally and by principles of equity). 
 [SIGNATURE PAGES FOLLOW] 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date
first above written. 
  

			
	ENERGYSOLUTIONS, LLC,
a Utah limited liability company
		
	By:	 	/S/ JEAN I. EVEREST II
		 	 Jean I. Everest II

		 	 Executive Vice President, Chief Financial Officer and Assistant Treasurer

	
	Taxpayer Identification Number: 14-1921823
	
	Address of Principal Place of Business:
	423 West 300 South
	Salt Lake City, Utah 84101

  

			
	STATE OF UTAH	  	)
		  	)
	COUNTY OF SALT LAKE	  	)

 On the day of February 9 in the year 2007, before me, the undersigned personally known
to me or proved to me on the basis of satisfactory evidence to be the individual whose name is subscribed to the instrument, personally appeared and acknowledged to me that he or she executed the same in his or her capacity, and that by his or her
signature on the instrument the individual, or the person or entity upon behalf of which the individual acted, executed the instrument. 
  

	
	/S/ SUZANNE A. ROSE
	Notary
	
	[Notarial Seal]

 [signatures continue on the following pages] 

			
	CITICORP NORTH AMERICA, INC., as Administrative Agent, Collateral Agent and a Lender
		
	By:	 	/S/ BLAKE GRONICH
		 	Name: Blake Gronich
		 	Title:   Vice President

 [signatures continue on the following page] 

			
	CITIBANK, N.A., as Revolving Issuing Bank and Synthetic Issuing Bank
		
	By:	 	/S/ BLAKE GRONICH
		 	Name: Blake Gronich
		 	Title: Vice President

 [signatures continue on the following page] 

			
	CITIGROUP GLOBAL MARKETS INC., as Lead Arranger
		
	By:	 	/S/ JULIE PERSILY
		 	Name: Julie Persily
		 	Title: Managing Director

 [signatures continue on the following page] 

			
	_______________________________, as a Lender
		
	By:	 	 
		 	Name:
		 	Title:

 [This Amendment was executed by authorized signatories of 258 Lender Institutions:]

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