ML052660294

RAI, Revised Reactor Vessel Material Surveillance Capsule Withdrawal Schedule (Tac MC6412, MC6413)

ML052660294
Person / Time
Site:	North Anna
Issue date:	10/03/2005
From:	Stephen Monarque NRC/NRR/DLPM/LPD2
To:	Christian D Virginia Electric & Power Co (VEPCO)
Monarque, S R, NRR/DLPM, 415-1544
References
TAC MC6412, TAC MC6413
Download: ML052660294 (4)

Text

October 3, 2005 Mr. David A. Christian Sr. Vice President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711

SUBJECT:

NORTH ANNA POWER STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION ON REVISED REACTOR VESSEL MATERIAL SURVEILLANCE CAPSULE WITHDRAWAL SCHEDULE (TAC NOS. MC6412 AND MC6413)

Dear Mr. Christian:

By letter dated March 15, 2005, Virginia Electric and Power Company (VEPCO) submitted a proposed reactor vessel material surveillance capsule withdrawal schedule for Nuclear Regulatory Commission (NRC) staff review and approval. The proposed schedules were developed to accommodate the 60-year licensing period for North Anna Power Station, Units 1 and 2, and to satisfy the requirements of the American Society for Testing and Materials document E-185-82, Standard Practice for Conducting Surveillance Tests for Light-Water Cooled Nuclear Power Reactor Vessels, and NUREG-1801, Generic Aging Lessons Learned (GALL) Report. The NRC staff has determined that additional information is required to complete its review.

The NRC staffs questions are provided in the Enclosure. VEPCO is requested to provide a response to the request for additional information within 45 days of the date of this letter.

Sincerely,

/RA/

Stephen R. Monarque, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339

Enclosure:

As stated cc w/encl: See next page

ML052660294 NRR-088 OFFICE PDII-1/PM PDII-2/LA PDII-1/SC NAME SMonarque CHawes /RA by BClayton for/ EMarinos DATE 09/ 28 /05 09/ 28 /05 10/ 03 /05 REQUEST FOR ADDITIONAL INFORMATION SURVEILLANCE CAPSULE WITHDRAWAL SCHEDULE NORTH ANNA, UNITS 1 AND 2 VIRGINIA ELECTRIC AND POWER COMPANY DOCKET NOS. 50-338 AND 50-339 By letter dated March 15, 2005, Virginia Electric and Power Company (VEPCO) submitted a proposed reactor vessel material withdrawal schedule for North Anna Power Station, Units 1 and 2. VEPCO is requested to respond to following questions below.

1. What are the projected peak neutron fluence (E>1.0 MeV) values for the North Anna, Units 1 and 2 reactor vessels at the end of their current operating licenses (which allow for a total of 60 years of power operation)?

2. Note h in Table A-1 of Appendix A to your letter dated March 15, 2005, for North Anna, Unit 1 states capsule X may be withdrawn at the [end of life] (EOL) to provide material properties data at a fluence which exceeds that expected to be achieved at the end of the 20-year license renewal period. Clarify the definition of EOL as it applies to Note h. Provide the calendar day, effective full-power years (EFPY) value, and the estimated surveillance capsule X neutron fluence (E>1.0 MeV) value, which are to be understood to be consistent with withdrawal of the capsule at EOL.

3. Note f in Table A-1 of Appendix A to your letter dated March 15, 2005, for North Anna, Unit 1, states capsule X may be withdrawn at 44.5 EFPY in lieu of surveillance capsule Z to satisfy American Society for Testing and Materials (ASTM) E-185-82 fourth capsule requirement for the license period.

a. What will the estimated neutron fluence (E>1.0 MeV) value be for surveillance capsule X withdrawn at 44.5 EFPY?

b. If surveillance capsule X is withdrawn in lieu of surveillance capsule Z at 44.5 EFPY, what will the estimated fluence be for surveillance capsule Z at 50.3 EFPY?

4. Note f in Table A-2 of Appendix A to your letter dated March 15, 2005, for North Anna, Unit 2, was modified to allow surveillance capsule X to be withdrawn at 42.8 EFPY in lieu of surveillance capsule Z to satisfy the ASTM E-185-82 fourth surveillance capsule withdrawal requirement for the licensed period.

a. What will the estimated neutron fluence (E>1.0 MeV) value be for surveillance capsule X withdrawn at 42.8 EFPY?

b. Does this estimated fluence value meet the requirements of ASTM E-185-82 for the fourth surveillance capsule for the 60-year license period?

Enclosure

2

c. If surveillance capsule X is withdrawn in lieu of surveillance capsule Z at 42.8 EFPY, what will the estimated fluence be for surveillance capsule Z at 52.3 EFPY?

5. Note g in Table A-2 of Appendix A to your letter dated March 15, 2005, for North Anna, Unit 2 states withdrawal of surveillance capsule Z at EOL satisfies ASTM E-185-82 requirement for EOL surveillance capsule and provides material properties data at a fluence which exceeds that expected to be achieved at the end of the 20-year license renewal period. Clarify the definition of EOL as it applies to Note g. Provide the calendar day, EFPY value, and the estimated surveillance capsule Z neutron fluence (E>1.0 MeV) value, which are to be understood to be consistent with withdrawal of the capsule at EOL.

6. Note h in Table A-2 of Appendix A to your letter dated March 15, 2005, for North Anna, Unit 2 states surveillance capsule X may be withdrawn at EOL to provide material properties data at a fluence which exceeds that expected to be achieved at the end of the 20-year license renewal period. Clarify the definition of EOL as it applies to Note h. Provide the calendar day, EFPY value, and the estimated surveillance capsule X neutron fluence (E>1.0 MeV) value which are to be understood to be consistent with withdrawal of the capsule at EOL.

7. Since there can be up to four standby surveillance capsules for North Anna, Units 1 and 2, these surveillance capsules have the potential to be removed for storage. However, the NRC staff notes that currently, there is no detailed guidance regarding the treatment of standby surveillance capsules. Therefore, the NRC staff requests the licensee to ensure that any surveillance capsules removed from the North Anna, Units 1 and 2 reactor vessels, without the intent to test them, are maintained in a condition that would permit their future use, if necessary. A note in the surveillance withdrawal schedule in the North Anna, Units 1 and 2 Updated Final Safety Analysis Report stating the following should be included to ensure that standby surveillance capsules are properly maintained:

All surveillance capsules placed in storage must be maintained for future insertion. Any changes to storage requirements must be approved by the NRC, as required by 10 CFR Part 50, Appendix H.

North Anna Power Station, Units 1 & 2 cc:

Mr. C. Lee Lintecum Mr. Jack M. Davis County Administrator Site Vice President Louisa County North Anna Power Station Post Office Box 160 Virginia Electric and Power Company Louisa, Virginia 23093 Post Office Box 402 Mineral, Virginia 23117-0402 Ms. Lillian M. Cuoco, Esq.

Senior Counsel Dr. Robert B. Stroube, MD, MPH Dominion Resources Services, Inc. State Health Commissioner Building 475, 5 th floor Office of the Commissioner Rope Ferry Road Virginia Department of Health Waterford, Connecticut 06385 Post Office Box 2448 Richmond, Virginia 23218 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23218 Old Dominion Electric Cooperative 4201 Dominion Blvd.

Glen Allen, Virginia 23060 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.

Innsbrook Technical Center 5000 Dominion Blvd.

Glen Allen, Virginia 23060-6711 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Senior Resident Inspector North Anna Power Station U. S. Nuclear Regulatory Commission 1024 Haley Drive Mineral, Virginia 23117