ML091760986
| ML091760986 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 06/24/2009 |
| From: | Tennessee Valley Authority |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML091760986 (17) | |
Text
1 Watts Bar Nuclear Plant, Unit 2 Safety Evaluation Report Review
Watts Bar Unit 2 Safety Evaluation Report Review for Operating License Technical Issues Resolved for Unit 2 as Part of WBN Unit 1 Operating License Review
- Original Safety Evaluation Report NUREG-0847 - Watts Bar Units 1 and 2 (June 30, 1982)
- Supplemental Safety Evaluation Reports (SSERs) 1-4 (1982-1985)
- SSERs 5-20 (1990-1995)
- SSER 21 - Baseline for WBN Unit 2 (2009)
Generic Letters Bulletins Circulars and TMI Items Resolved for Unit 2 as Part of WBN Unit 1 2
Generic Letters, Bulletins, Circulars and TMI Items Resolved for Unit 2 as Part of WBN Unit 1 Operating License Review Corrective Action Programs and Special Programs
- Construction deficiencies unique to Watts Bar
- Majority resolved for WBN Unit 2 using WBN Unit 1 Precedent
- Change to WBN Unit 1 Precedent under Review
- Programs Remaining Open
Units 1 and Unit 2 received construction permit June 30, 1982 -
NRC issues 50.54(f) letter to TVA - September 17, 1985 May 27, 1988 -
October 24, 1995 August 3, 2007 -
March 6, 2008 March 13, 2008 -
TVA initially submitted FSAR Amendment 91 on both Unit 1 and Unit 2 dockets that described the facility in support of Unit 1 operation.
NRC staff issued NUREG-0847, Safety Evaluation Report related to the operation of Watts Bar Nuclear Plant Units 1 and 2 TVA submits Volume 4 of the Nuclear Performance Plan to address Watts Bar site specific issues in response to NRC 50.54(f) letter TVA notified NRC of plans to resume unrestricted construction activities on Unit 2.
TVA requests extension of Unit 2 construction permit.
January 1, 1973 TVA submitted restructured tables for l t f
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Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 3
March 20, 2008 June 16, 2008 -
July 2, 2008 July 7, 2008 -
April 30, 2009 TVA submitted restructured tables for previously submitted Generic Communications.
TVA re-submitted FSAR, Amendment 91 TVA submitted FSAR, Amendment 93 regulatory framework for the completion of construction and licensing activities for Unit 2.
TVA submitted Regulatory Framework letter, Revision 1 NRC extends Unit 2 constructions permit to March 2013
- September 26, 2008 TVA submitted Regulatory Framework for the Completion of Corrective Action Program (CAP) Plans and Special Programs (SP) and Unresolved Safety Issues December 18, 2008 -
TVA submitted FSAR Amendment 92 NRC issues Supplemental Safety Evaluation Report (SSER) 21 identifying the remaining issues for Unit 2 licensing.
February 28, 2009 -
August 27, 2009 -
TVA plans to submit Amendment 94 January 11, 2010 - TVA plans to submit Amendment 96 November 27, 2009 TVA plans to submit Amendment 95
Original SER addressed both Units when issued in June 30, 1982 Supplements 1 through 4 also dealt with Units 1 & 2 (1982 - 1985)
After Supplement 4 in March 1985, licensing activities for both units put on hold because of problems identified at TVA plants Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 4
Supplements 5 (November 1990) through 20 (February 1996, with Unit 1 full-power license)
Focus primarily on licensing of Unit 1 However, some WBN Unit 2 issues were also addressed in these supplements as a result of the Unit 1 Licensing effort
TVA Activities to Aid Development of Supplemental Safety Evaluation Report (SSER) 21
- Regulatory Framework Submittals Documented results of TVA review of original SER and supplements to identify open issues
- Generic Communications Submittals Series of submittals in which a listing of generic communications focus on time periods of before and after Unit 1 Licensing Before Unit 1 licensing in most cases, responses placed on both Unit 1 and Unit 2 Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 5
Before Unit 1 licensing in most cases, responses placed on both Unit 1 and Unit 2 dockets.
After Unit 1 Licensing, responses focused on strictly Unit 1 Operation.
- Corrective Action Programs (CAPs) and Special Programs (SPs) Submittals Committed Unit 2 to Unit 1 Precedent for most CAPs and SPs Identified some CAPs and SPs where changes needed to be based on Unit 1 lessons learned. (e.g., Cable Issues)
Two CAPs and SPs closed based upon Unit 1 Licensing Effort
NRC Activities in the Development of Supplemental Safety Evaluation Report (SSER) 21
- Performed similar SER/SSER, Generic Communications, and CAPs/SPs reviews in parallel with TVA
- Compared results of both NRC and TVA reviews
- Conducted NRC/TVA meetings to resolve identified differences resulting from TVA and NRC reviews Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 6
- Issued Request for Additional Information (RAI) on areas where additional information needed to be placed on the Unit 2 docket.
- Issued SSER 21 on February 28, 2009.
Review Status for each SER Section in summary form can be found in SSER 21.
Document Status Resolved Open (NRR)
Open (Region II Inspection)
Provides reference to previous SER Review Further details can be found from the following sources:
- NRC letter dated October 10, 2008 entitled, Watts Bar Nuclear Plant, Unit 2 - Status of Regulatory Framework for the Completion of Operating License Review (TAC No. MD9424)
Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 7
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- TVA letters include SER/SSER Items - Letter dated June 16, 2008 entitled, Watts Bar Nuclear Plant, Unit 2 -
Regulatory Framework for the Completion of Construction and Licensing for Unit 2 -
Revision 1 (TAC NO. MD6311)
Generic Communication Items - Letter dated March 20, 2008 entitled, Watts Bar Nuclear Plant - Unit 2 - Generic Communications Status for Unit 2 - Restructured Tables CAPs/SPs Items - Letter dated September 26, 2008 entitled, Watts Bar Nuclear Plant, Unit 2 - Regulatory Framework for the Completion of Construction and licensing Activities for Unit 2 - Corrective Action and Special Programs and Unresolved Safety Issues
- Of 356 SER Sections listed in SSER 21, Section 1.7, Summary of Outstanding Items,
- 148 (41%) Items statused as Resolved - These sections have been reviewed and resolved with no further NRC review required, but may require a confirmatory review of the final FSAR section to verify no changes occurred from what was previously approved.
- 125 (35%) Items statused as Open (NRR)
Some sections have outstanding issues (e.g. for dual unit operation, impact from generic communications, etc.)
Other sections will require TVA to provide further information (via additional Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 8
Other sections will require TVA to provide further information (via additional correspondence or by FSAR amendments) to correct existing information that has changed since 1995.
Still other sections may require different approach that was used for Unit 1.
- 17 (5%) Items statused as Open (Inspection)
NRR Review complete awaiting Region II Inspection results
- 66 (19%) Items status field is blank - General Headings such as introduction, subject matter found under other headings, etc,
- Of the 18 CAPs listed in SSER 21, Section 1.13.1, Corrective Action Programs
- 14 (78%) Items statused as Resolved - These CAPs have been reviewed and resolved with no further NRC review required, but may require a confirmation of implementation by Region II Inspections.
- 4 (22%) Items statused as Open (NRR)
Some CAPs have outstanding issues and will require TVA to provide further information Other CAPs may require a review of a different approach based on Unit 1 lessons learned Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 9
learned.
- Of the 11 SPs listed in SSER 1.13.2, Special Programs
- 11 Items are statused as Resolved These SPs have been reviewed and resolved with no further NRC review required, but may require a confirmation of implementation by Region II Inspections.
- Of the 54 Open Generic Communications Items listed in SSER 21, Section 1.14, Implementation of Applicable Bulletin and Generic Letter Requirements, the NRC Action are listed as follows:
- 39 (72%) Items statused as Open (NRR)
- TVA has provided information as part of the Regulatory Framework for Unit 2.
- 15 (28%) Items statused as Submit Technical Specifications - NRR review is to confirm existence of an TS addressing issue.
Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 10
FSAR developed using RG-1.70 FSAR Amendments submitted as design completes by system by building in accordance with system waterfall schedule (See Diagrams on next two slides.)
Technical Specifications Updates to the templates provided as part of the Operating License Update submitted March 4, 2009 Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 11 Additional Correspondence Through meetings and/or teleconferences
- Status of outstanding issues will be tracked by periodically updates to TVAs Regulatory Framework Matrix and subsequent NRC SSERs.
- Preservation of Licensing Basis using PP-20, Licensing Basis Preservation
Watts Bar Unit 2 SAR History 12
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- Confirmation package assembled once FSAR Section
- FSAR Section Submitted upon design complete (Receipt of Confirmation Package)
- May incorporate individual design changes but will not credit section complete until design complete Amendment To NRC Unit 2 Licensing Change Package (Design Driven)
Task Engineer/Designers Processes Packages Unit 2 Licensing Watts Bar Unit 2 FSAR Simplified Process Prepares and Transmits Confirmation Change Package Engineering Licensing 13
- By System by Building
- By Pieces of FSAR Section
- Change Packages include
- Procedure Cover Form
- Table of Contents/Roadmap
- Description of change(s)
- Justification for changes
- Supporting information/ documents
- Markups of current Living Unit 2 FSAR Pages
- Drawings for New Designs Confirmation package assembled once FSAR Section achieves design complete.
- Perform verification review of a given section of the Unit 2 FSAR to ensure that the information is accurate and consistent with other sections of the Unit 2 FSAR and the Living Unit 1 UFSAR, including any design changes affecting the section. (Refer to RG-1.70 for guidance, if necessary)
- Ensure Unit 2 FSAR is bounded by the Unit 1 UFSAR, utilizing the Unit 1 UFSAR verbiage, as applicable
- If appropriate, validate no change required
A93 Submittal 14 2009-04 FSAR Amendment 93 2009-02 SSER 21
A93 Submittal 15 SSER 21 FSAR Amendment 93
- In Summary
- Approximately 65% SER sections are already resolved
- Outstanding Issues are known and included in SSER 21.
- TVA systematic approach will address and resolve the outstanding issues.
- Limited FSAR changes Watts Bar Unit 2 Safety Evaluation Report Review for Operating License 16
- Submittal milestones remaining
Questions?
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