POLICY ISSUE

(INFORMATION) 

August 12, 2011 SECY -11-0111

FOR: The Commissioners 

FROM: Michael R. Johnson, Director /RA/ 

 Office of New Reactors 

SUBJECT: STAFF PROGRESS IN RESOLVING ISSUES ASSOCIATED WITH 

INSPECTIONS, TESTS, ANALYSES, AND ACCEPTANCE CRITERIA 

PURPOSE: 

To inform the Commission of the staff’s resolution of issues associated with inspections, tests, 

analyses, and acceptance criteria (ITAAC) and to provide an update on recent domestic and 

international construction experience (ConE) being incorporated into the U.S. Nuclear 

Regulatory Commission’s (NRC’s) programs. 

This paper does not address any new commitments or resource implications. 

SUMMARY: 

The staff has made significant progress in resolving issues and developing programs on ITAAC 

and ConE. With a majority of the policy development work completed, the staff’s focus is now 

on refining and implementing these processes and programs. This paper also incorporates the 

ConE annual update in an effort to reduce multiple submittals to the Commission on similar 

topics. 

The NRC simultaneously published the proposed rulemaking for ITAAC maintenance and the 

associated draft revision to Regulatory Guide (RG) 1.215, “Guidance for ITAAC Closure under 

10 CFR Part 52,” in May 2011 for a 75-day public comment period. With no significant 

comments received, the staff expects to issue a final rule and guidance in May 2012. Also, the 

CONTACTS: Calvin H. Cheung, NRO/DCIP 

301-415-2043 

James E. Gaslevic, NRO/DCIP 

 301-415-2776 
The Commissioners - 2 - 

staff is preparing a draft process for making its recommendation for the Commission’s Title 10 of 

the Code of Federal Regulations, Part 52, Section 103(g) (10 CFR 52.103(g)) finding. The 

Simulated ITAAC Closure and Verification Demonstration Project, which involved NRC staff, the 

U.S. Department of Energy (DOE), Southern Nuclear Company (SNC), and Westinghouse 

Electric Company (WEC), was completed in April 2011, and the staff issued a final report that 

included lessons learned and next steps (Agencywide Documents Access and Management 

System (ADAMS) Accession No. ML11203A079). The staff also refined the draft ITAAC 

Closure Verification Process (ICVP), incorporating key lessons learned from the demonstration 

and from interaction with internal and external stakeholders, and plan to issue it by the end of 

2011. 

The ConE staff is implementing the programs developed for gathering, processing, and 

communicating the collected information. The staff reviews domestic and international 

construction and operating experience information for applicability, communicates this 

information, and works with the Office of New Reactors (NRO) staff to help identify and provide 

enhancements to the NRC’s programs as necessary. Information exchange with international 

partners through multilateral activities is a key component of the ConE processes. 

As the staff transitions from development to implementation of the processes for ITAAC and 

ConE, it does not expect significantly new developments in these areas. Going forward, the 

staff will inform the Commission of developments involving ITAAC and ConE, if any, in the 

annual construction reactor oversight process (cROP) assessment.

BACKGROUND: 

In SECY-08-0117, “Staff Approach To Verify Closure of Inspections, Tests, Analyses, and 

Acceptance Criteria and To Implement Title 10 CFR 52.99, ‘Inspection during construction,’ and 

Related Portion of 10 CFR 52.103(g) on the Commission Finding,” dated August 7, 2008 

(ADAMS Accession No. ML081220237), the staff provided an update on plans to inspect and 

perform the closure verification of ITAAC completed by licensees. The related staff 

requirements memorandum (SRM), dated January 14, 2009 (ADAMS Accession 

No. ML090140136), directed the staff to keep the Commission informed of progress in resolving 

issues associated with ITAAC, including instances in which successfully completed ITAAC are 

no longer satisfied. 

Since 2008, the staff has provided two updates related to ITAAC. In SECY-09-0119, “Staff 

Progress in Resolving Issues Associated with Inspections, Tests, Analyses, and Acceptance 

Criteria,” dated August 26, 2009 (ADAMS Accession No. ML091980327), the staff discussed 

progress toward resolving issues concerning ITAAC maintenance and reporting, including the 

notification thresholds for events that may invalidate a previous determination that an ITAAC 

was successfully completed (i.e., that acceptance criteria may no longer be met). In 

SECY-10-0100, “Staff Progress in Resolving Issues Associated with Inspections, Tests, 

Analyses, and Acceptance Criteria,” dated August 5, 2010 (ADAMS Accession 

No. ML101660583), the staff discussed progress in its efforts to develop a proposed rule and 

guidance to address ITAAC maintenance during the period between a licensee’s submittal of an 

ITAAC closure notification (ICN) and the Commission’s 10 CFR 52.103(g) finding. 

The staff hosted seven public workshops in the last 12 months to solicit input and exchange 

views on issues related to ITAAC closure verification, the Simulated ITAAC Closure and 
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Verification Demonstration Project, and other Construction Inspection Program (CIP) topics. 

Members of the public, the Nuclear Energy Institute (NEI), industry representatives, and other 

external stakeholders participated in these public workshops. SRM-M090922, “Staff 

Requirements—Periodic Briefing on New Reactor Issues—Progress in Resolving Issues 

Associated with Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC),” dated 

October 16, 2009 (ADAMS Accession No. ML092890658), asked the staff to provide the 

Commission with an update on ConE gained from other countries, including oversight and 

vendor inspection. This request was part of the original Commission tasking to provide periodic 

updates on the ConE program, as documented by SRM-M071024B, “Staff Requirements—

Periodic Briefing on New Reactor Issues,” dated November 13, 2007 (ADAMS Accession 

No. ML073180039). In response, the staff provided two updates via Commissioners’ Assistant 

notes on March 30, 2010 (ADAMS Accession No. ML100910100, routine administrative records, 

not publically available), and October 14, 2010 (ADAMS Accession No. ML102700167, routine 

administrative records, not publically available), covering updates up to September 2010. 

DISCUSSION: 

Proposed ITAAC Maintenance Rulemaking and Status of Associated Draft Revision to 

Regulatory Guide 1.215

The NRC published both the proposed ITAAC maintenance revisions to 10 CFR Part 2, “Rules 

of Practice for Domestic Licensing Proceedings and Issuance of Orders,” and to 10 CFR 52.99 

and the associated draft Revision 1 to RG 1.215 for a 75-day public comment period on 

May 13, 2011. The rulemaking addresses language changes to 10 CFR Part 2 and 

10 CFR Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants”, and adds 

notifications to 10 CFR Part 52 that will be required once an ITAAC is closed and there are 

material changes to the basis for completion of that ITAAC. The proposed rule also adds a 

notification requirement for licensees to inform the NRC that all ITAAC have been completed 

and that the facility is ready for the finding by the Commission under 10 CFR 52.103(g). 

Draft Revision 1 of RG 1.215 endorses the methodologies described in the industry guidance 

document, NEI 08-01, “Industry Guideline for the ITAAC Closure Process under 

10 CFR Part 52,” Revision 4, issued July 2010. The NRC originally published RG 1.215 in 

October 2009. In addition to the new reporting requirements particular to ITAAC maintenance, 

the revised RG 1.215 and NEI 08-01 contain guidance on early notifications made by the 

licensee that will provide additional inspection opportunities for reworked ITAAC that had 

previously been closed. The revised RG 1.215 and NEI 08-01 also add expanded guidance on 

“as-built” ITAAC, specifically on inspections, tests, and analyses conducted at remote locations. 

The comment period ended on July 27, 2011, and the agency received no significant 

comments. This represents significant progress in completing the ITAAC maintenance 

rulemaking effort. The staff’s preparation for the rulemaking and regulatory guidance 

development involved extensive industry and public interactions, primarily through the ITAAC 

public workshop series. These regular interactions with industry and the public helped to create 

a proposed rule and guidance package that already captured significant input from interested 

stakeholders. The staff will deliver the final rule to the Commission in January 2012, and will 

issue Revision 1 to RG 1.215 with the final rule publication. The current schedule allows for 

resolution of comments, followed by staff, Committee to Review Generic Requirements, 
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Advisory Committee on Reactor Safeguards, Commission, and Office of Management and 

Budget reviews. 

Preparation for Staff’s Recommendation on 10 CFR 52.103(g)

The NRC staff is developing a process for its recommendation to the Commission on making a 

finding in accordance with 10 CFR 52.103(g). The staff is preparing an office instruction, which 

provides guidance to the staff on collecting the necessary information and communicating the 

staff’s determination that all inspections, tests, and analyses are performed and the acceptance 

criteria are met for a given facility, and on communicating the staff’s recommendation to the 

Commission. 

Currently, the staff anticipates that the office instruction will: 

• Ensure that the licensee has submitted notifications in accordance with 10 CFR 52.99. 

• Verify that all ITAAC are successfully completed, and ensure that Federal Register

notices have been published for every verified ITAAC until such notices are no longer 

required. 

• Ensure that inspection activities required under Inspection Manual Chapter (IMC) 2503, 

“Construction Inspection Program: Inspections of Inspections, Tests, Analyses, and 

Acceptance Criteria (ITAAC),” and IMC 2505, “Periodic Assessment of Construction 

Inspection Program Results,” are completed. 

• Provide templates for the SECY vote paper and determination basis document. 

The staff will continue to refine this process and its supporting documents by incorporating 

solicited input from the working group and other stakeholders. 

Simulated ITAAC Closure and Verification Demonstration Exercise

The NRC staff and stakeholders participated in the Simulated ITAAC Closure and Verification 

Demonstration Project from July 2010 through April 2011. In addition to the NRC, participants 

included DOE as the project sponsor, NEI, WEC, and SNC. The primary objective of the 

demonstration was to verify that the ITAAC closure and verification processes could reliably and 

efficiently support ITAAC closure. A secondary objective of the demonstration was to evaluate 

the expected surge in ICNs submitted during the last year of facility construction, when a 

substantial number of ITAAC are scheduled for completion. 

The lessons learned from the demonstration have already proven valuable in refining both the 

draft ICVP office instruction and the draft office instruction on the 10 CFR 52.103(g) process. 

Recommendations have been made on how to further improve the industry ITAAC closure and 

the NRC ITAAC verification processes, which may aid in managing the ITAAC surge. Industry 

participants recommended that the NRC staff review the 10 CFR 52.99(c)(2) uncompleted 

ITAAC notifications (225-day letters), as this could reduce ICN review time requirements by 

previewing the completed work as well as work planned to complete the ITAAC. Problems with 

the completed or planned work could be communicated to the licensee. The staff is currently 
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reviewing this proposal and will continue to discuss this with stakeholders during the public 

workshop series. As an additional step, the staff has begun to categorize ITAAC with similar 

attributes into specific groups. Each specific group will then have an ICN template developed 

so that better coverage of ITAAC is represented in the industry guidance document, NEI 08-01, 

which is endorsed by RG 1.215. The staff may incorporate these additional templates into 

future revisions to NEI 08-01 and RG 1.215. 

The demonstration was extremely valuable in exercising many aspects of the ITAAC closure 

and verification processes. Some significant aspects include the technical assistance request 

(TAR) process, the Construction Inspection Program Information Management System 

(CIPIMS), and the Verification of ITAAC Closure Evaluation and Status (VOICES) information 

technology system. The TAR process was improved by facilitating two-way communication 

between NRC Headquarters and Region II for coordination of inspection support activities. The 

staff recognized that CIPIMS did not meet all users’ requirements, and confirmed that several 

features need enhancements in version 2.0. CIPIMS 2.0 is currently under development, and is 

scheduled to be completed in early calendar year 2012. VOICES was identified as a key 

component of the ITAAC closure and verification processes. However, it was not built at the 

time of the demonstration. VOICES is scheduled to be completed by the middle of calendar 

year 2012. 

The demonstration served as a proactive assessment of the process as the NRC staff prepares 

for future ITAAC closure and verification activities. Based on the results of the demonstration 

and interactions between participants, the staff issued a final report in July 2011 summarizing 

the demonstration, capturing lessons learned, and proposing next steps (ADAMS Accession 

No. ML11166A182). 

ITAAC Closure Verification Process

Over the past year, the staff has refined the ICVP to support its activities under the regulatory 

requirements of 10 CFR 52.99 to verify the successful completion of each combined license 

ITAAC by the licensee. The staff expects to issue a draft office instruction in calendar 

year 2011 that provides instructions for the NRC staff for ITAAC closure and verification. 

The verification of successful completion of an ITAAC is based on (1) sufficient information in its 

ICN, (2) confirmation by NRC inspection results documented in CIPIMS, and (3) other pertinent 

information sources when warranted. The staff will use an ICN determination review template 

designed to focus the staff’s review of each ITAAC closure notification so that an efficient and 

effective determination on its successful completion may be made. The completed 

determination for all combined license ITAAC will be part of the basis for the staff’s 

recommendation to the Commission for its finding under 10 CFR 52.103(g). In addition, the 

ICVP includes publishing the NRC verification of an ITAAC in the Federal Register in 

accordance with 10 CFR 52.99(e). 

To aid the ICVP, the staff determined the specifications for VOICES that will work in conjunction 

with CIPIMS. The staff expects that development and integration with CIPIMS will be completed 

in fiscal year 2012. The VOICES system will track, record the status, and provide relevant 

information for each combined license ITAAC. The NRO staff will use this system during its 

reviews to verify the successful completion of ITAAC. 
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Since its inception over 2 years ago, the ICVP has been refined by integrating substantial input 

from internal and external stakeholders. Its development is a major milestone in the staff’s 

preparation for new reactor construction. 

Construction Experience Update

Since the establishment of the ConE program in 2007, it has steadily matured and stabilized 

into a reliable program that provides NRC inspectors and NRO technical reviewers with insights 

from the design, construction, and operation of new reactors. The ConE team continues to 

screen and evaluate daily event issues (through the Operating Experience Clearinghouse 

meetings) to determine their applicability to new reactor construction. The staff issued Office 

Instruction NRO-REG-112, “New Reactor Construction Experience Program,” on 

March 31, 2009 (and Revision 1 on December 31, 2010), to provide a systematic process for 

incorporating lessons learned and insights from the design, construction, and operation of 

international and domestic commercial reactors into the licensing reviews, inspections, and 

construction of new reactors. The staff also deployed a Web-based database in 

September 2010 to enable the NRC staff to search and retrieve international and domestic 

ConE event reports. This database collects information on construction and operational events 

that have been screened and evaluated for applicability to new reactor construction in 

accordance with NRO-REG-112. 

The staff refined its process to obtain and review domestic and international construction and 

operating experience information for applicability, and to incorporate lessons learned into the 

NRC’s programs. From October 2010 through June 2011, the ConE program issued, or 

supported the issuance of, the following products (details attached in Enclosure 1): 

• 11 operating experience communications on construction-related insights and lessons 

learned 

• 11 ConE issues for resolution for events that required further technical evaluation 

• Four information notices 

During this same period, the staff incorporated lessons learned from the ConE program’s event 

evaluations and reviews into NRC programs as follows: 

• Initiated a revision request for Inspection Procedure (IP) 65001.10, “Inspection of 

ITAAC-Related Installation of Instrument Components and Systems,” dated 

October 20, 2008 (ADAMS Accession No. ML081640241), to enhance inspection 

guidance for gas- and liquid-sensing-line installation. 

• Initiated a revision request for IP 65001.11, “Construction Inspection Program Inspection 

of ITAAC-Related Containment Integrity and Containment Penetrations,” dated 

August 9, 2008 (ADAMS Accession No. ML080930102), to enhance inspection guidance 

for containment-liner installation. 

• Initiated a new ITAAC concerning the advanced boiling-water reactor (ABWR) turbine 

building (TB) seismic design: a site-specific ITAAC is being added to the South Texas 
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Project’s combined license application. The added ITAAC will specifically delineate a 

requirement for the performance of a dynamic analysis of the TB, such that the ABWR 

design control document dynamic input requirements for the main steamline are satisfied 

for the final design of the TB. Related actions are planned for the ABWR design 

certification renewal application. 

The NRC staff successfully completed information exchanges on ConE with international 

partners through multilateral activities. From October through November 2010, the Center for 

Construction Inspection (CCI) supported an information exchange with the Finnish Center for 

Radiation and Nuclear Safety (STUK). The inspector observed and participated in ongoing 

inspections of electrical instrumentation-related construction activities for Olkiluoto Nuclear 

Power Plant, Unit 3 (OL3), to gain insights that might be applicable to the NRC’s construction 

oversight program. The inspector also accompanied STUK on a vendor inspection of 

instrumentation and control software development in Germany in November 2010. The 

exchange also validated portions of the NRC’s electrical construction inspection program while 

at OL3. 

From October through December 2010, CCI supported an information exchange with the 

National Nuclear Safety Authority (NNSA) of China. The inspector observed and participated in 

ongoing inspections of the containment vessel welding and other related construction activities 

at the Sanmen AP1000 site to gain insights that might be applicable to the NRC’s construction 

oversight program. The exchange validated portions of the NRC’s welding and structural 

inspection program. In both cases, the inspector’s trip report was evaluated for potential 

lessons learned that could be applied to NRC’s programs. The NRC is finalizing the details to 

place an NRC vendor inspector with the Chinese vendor inspection group for a 3-month 

rotational exchange with the NNSA. Through this rotation, the staff will gain additional insights 

from construction activities at the Sanmen AP1000 site. 

The Multinational Design Evaluation Program’s Vendor Inspection Cooperation Working Group 

participated in several observed vendor inspection activities, such as inspectors observing 

vendor inspections done by other regulators. The first joint inspection, a vendor inspection led 

by one country supported by inspectors from another country, is planned for October 2011 at 

Doosan Heavy Industries in the Republic of Korea. By communicating these experiences, the 

NRC staff will be better able to leverage insights from foreign inspection reports to inform future 

NRC vendor inspections and to target the use of NRC resources. 

The ConE staff has successfully provided significant new reactor construction insights, lessons 

learned, and related recommendations. The staff continues to work closely with the agency’s 

operating experience program staff to ensure that all relevant construction experience, both 

domestic and international, is evaluated for applicability to the NRC’s new reactor licensing, 

vendor, and CIPs. 

Transition from Annual Update to As-Needed Paper

SRM-SECY-08-0117, dated January 14, 2009 (ADAMS Accession No. ML090140136), directed 

the staff to keep the Commission informed of progress in resolving issues associated with 

ITAAC, including instances where successfully completed ITAAC are no longer satisfied. 

Additionally, SRM-M071024B (ADAMS Accession No. ML073180039) directed the staff to keep 

the Commission informed on how lessons from recent domestic construction experience, 
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international experience in design, construction, and inspection of new reactors are being 

incorporated into NRC’s programs. This paper is the third annual update to the Commission in 

response to SRM-SECY-08-0117, and the fourth annual update to SRM-M071024B. The staff 

has made significant progress in program development and in the resolution of ITAAC and 

ConE issues since the Commission issued the SRMs. With the majority of ITAAC and ConE 

program development now completed, current work is focused on refinements of the programs 

as well as implementation of the processes developed. 

Based on the completed work in these areas, the staff believes that annual updates are no 

longer necessary. As new issues arise, the staff will include updates with the annual cROP 

self-assessment update (per SRM-SECY-10-0140, “Options for Revising the Construction 

Reactor Oversight Process,” dated March 21, 2011), beginning in April 2012. 

COORDINATION: 

This paper has been coordinated with the Office of the General Counsel, which has no legal 

objection to this paper. 

 /RA/

Michael R. Johnson, Director 

Office of New Reactors 

Enclosure: 

Summary of ConE Products October 2010 

 through June 2011
The Commissioners - 8 - 

international experience in design, construction, and inspection of new reactors are being 

incorporated into NRC’s programs. This paper is the third annual update to the Commission in 

response to SRM-SECY-08-0117, and the fourth annual update to SRM-M071024B. The staff 

has made significant progress in program development and in the resolution of ITAAC and 

ConE issues since the Commission issued the SRMs. With the majority of ITAAC and ConE 

program development now completed, current work is focused on refinements of the programs 

as well as implementation of the processes developed. 

Based on the completed work in these areas, the staff believes that annual updates are no 

longer necessary. As new issues arise, the staff will include updates with the annual cROP 

self-assessment update (per SRM-SECY-10-0140, “Options for Revising the Construction 

Reactor Oversight Process,” dated March 21, 2011), beginning in April 2012. 

COORDINATION: 

This paper has been coordinated with the Office of the General Counsel, which has no legal 

objection to this paper. 

 /RA/

Michael R. Johnson, Director 

Office of New Reactors 

Enclosure: 

Summary of ConE Products October 2010 

 through June 2011 

WITS 201100096/EDATS: SECY-2011-0094 

WITS 200900019/EDATS: SECY-2010-0405 

WITS 200700454 

ADAMS Accession Number: ML11174A304 *via e-mail SECY-012 

OFFICE NRO/DCIP/CTSB NRO/DCIP/CTSB TECH EDITOR 

NAME CCheung JGaslevic KAzariah-Kribbs* 

DATE 06/23/11 07/08/11 07/21/11 

OFFICE NRO/DCIP/CTSB NRO/DCIP/CTSB NRO/DCIP/CAEB 

NAME RLaura MKowal TFrye 

DATE 07/12/11 07/14/11 07/05/11 

OFFICE NRO/DCIP NRO/DNRL NRC/REG II 

NAME LDudes (JTappert for) DMatthews* JMoorman* 

DATE 07/12/11 07/18/11 07/18/11 

OFFICE NRC/NSIR NRC/OGC NRC/NRO 

NAME JWiggins (MDapas for*) MZobler* MJohnson 

DATE 07/18/11 08/04/11 08/12/2011 

OFFICIAL RECORD COPY
ENCLOSURE 

Summary of Construction Experience (ConE) Products 

October 2010 thru June 2011 

Operating Experience Community Communications (COMMs)

Title Posted Date 

Oconee - Defect Discovered in Tube Steel that could have Applications in 

Various Safety Related Structural Systems December 3, 2010 

Robinson - Excessive Hunting of the Auxiliary Feed Water Pump Governor 

Caused by the Incorrect Oil Used During Preventive Maintenance January 21, 2011 

Browns Ferry - Drywell Pressure Instrument Channel Inoperability due to 

Improper Instrument Tubing Slope January 25, 2011 

Stuxnet Malware and Cyber Security March 2, 2011 

Fessenheim - High Oxygen Content in Two Gaseous Waste Treatment Tanks 

Constituting Fire Risk Caused by Shelf Life And Maintenance Issues April 1, 2011 

Kewaunee Power Station - Calibration Procedure for Protective Instrumentation 

not Compliant with Technical Specification April 14, 2011 

Summary of the 2010 Joint Meeting to Exchange Information on Recent Events 

in NPPS and Annual Meeting of the IRS National Coordinators April 27, 2011 

Inadequate Design Change Implementation Involving Abandoned In Place 

Equipment May 2, 2011 

Containment Liner Corrosion / Degradation Issues May 12, 2011 

LES NEF - Commercial Grade Dedication Issues Identified By NRC Inspection May 17, 2011 

Turkey Point Power Plant - Latent Design Deficiency of Main Steam Line High 

Range Noble Gas Effluent Monitor June 29, 2011 

Issues For Resolution (IFRs)

Title Initiated Date Evaluation 

Status 

ConE 2011-01: ABWR Turbine Building Calculated Seismic 

Repsonse Spectra exceed those in DCD October 21, 2010 Complete - ML111730526

ConE 2011-02: Velan's Part 21 regarding Limitorque's Limit 

Switches Contacts November 10, 2010 Pending 

ConE 2011-03: Review of BWR Pressure Boundary Piping 

Leaks due to IGSCC December 13, 2010 Complete - ML110470364

ConE 2011-04: 2007 Kashiwazaki-Kariwa Earthquake February 23, 2011 Pending 

ConE 2011-05: Dual Unit Tripping Design Considerations for 

New Reactors March 8, 2011 Pending 

ConE 2011-06: Understanding the Fukushima Daiichi Event March 28, 2011 Pending 

ConE 2011-07: Understanding the Fukushima Daini Event April 1, 2011 Pending 
- 2 - 

Title Initiated Date Evaluation 

Status 

ConE 2011-08: Crystal River 3 Containment Delamination April 28, 2011 Pending 

ConE 2011-09: Adverse Concrete Conditions Due to Distress 

from Alkali-Silica Reaction June 23, 2011 Pending 

ConE 2011-10: Browns Ferry 1 Failure of a Low Pressure 

Coolant Injection Flow Control Valve June 23, 2011 Pending 

ConE 2011-11: Flamanville 3 Vessel Head Welding Issues June 23, 2011 Pending 

Supported Generic Communications

Title Date/Status 

NRC INFORMATION NOTICE 2010-26: Submerged Electrical Cables December 2, 2010 - 

ML102800456 

NRC INFORMATION NOTICE 2010-27: Ventilation System Preventive 

Maintenance And Design Issues 

December 16, 2010 - 

ML102450114 

NRC INFORMATION NOTICE 2011-01: Commercial-Grade Dedication Issues 

Identified During NRC Inspections 

February 15, 2011 -

ML103220180 

NRC INFORMATION NOTICE 2011-05: Tohoku-Taiheiyou-Oki Earthquake 

Effects On Japanese Nuclear Power Plants 

March 18, 2011 - 

ML110760432