ML11308B405

Letter, Technical Evaluation Related to Restart Readiness Determination Plan

ML11308B405
Person / Time
Site:	North Anna
Issue date:	11/11/2011
From:	Leeds E Office of Nuclear Reactor Regulation
To:	Heacock D Virginia Electric & Power Co (VEPCO)
Martin, R E, DORL/LPLII-1, 415-1493
Shared Package
ML11308B404	List: ML11308B405
References
TAC ME7254, TAC ME7255
Download: ML11308B405 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 11, 2011 Mr. David A. Heacock President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

SUBJECT:

NORTH ANNA POWER STATION, UNIT NOS. 1 AND 2 - TECHNICAL EVALUATION OF RESTART READINESS DETERMINATION PLAN (TAC NOS.

ME7254 AND ME7255)

Dear Mr. Heacock:

By letter dated September 17, 2011, as supplemented by letters dated September 27, 2011 (two); October 3,2011 (two), October 10, 2011, October 12,2011, October 17,2011, October 18, 2011 (two), October 20, 2011, October 25, 2011, October 28, 2011 (two), and October 31, 2011 (two), November 3, 2011, November 4, 2011, and November 7, 2011, Virginia Electric and Power Company (VEPCO, the licensee), submitted a summary report of the plant response to an earthquake centered near Mineral, Virginia, which occurred on August 23, 2011, for North Anna Power Station (NAPS), Units 1 and 2. The report also included a restart readiness determination plan. In the letter dated September 17, 2011, VEPCO stated that the earthquake exceeded the spectral and peak ground accelerations for the Operating Basis and Design Basis Earthquakes ("OBE" and "DBE", respectively) for NAPS, Units 1 and 2. More specifically, the recorded response spectra at the containment basemat which is founded on rock, in the range of frequencies most damaging to structures (e.g., 2 to 10 Hertz), did not exceed the NAPS DBE in the East-West direction, and only exceeded, on average, the North South direction by about 12 percent and the vertical direction by about 21 percent.

In that letter, VEPCO also requested the concurrence of the U.S. Nuclear Regulatory Commission (NRC, the Commission) to restart North Anna, Units 1 and 2, upon completion of certain remaining near-term items. This request was made pursuant to Title 10 of the Code of Federal Regulations (10 CFR), Part 100 Appendix A,Section V(a)(2), which requires a demonstration to the Commission that no functional damage has occurred to those features necessary for continued operation without undue risk to the health and safety of the public.

By letter dated September 30, 2011, the NRC issued Confirmatory Action Letter (CAL) No. 2-2011-001 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML11273A078), confirming your commitment that NAPS, Units 1 and 2, will not enter Modes 1-4 (as defined in the facility technical specifications), until the Commission has completed its review of the request for restart, performed confirmatory inspections, and completed its safety evaluation review.

The NRC staff has completed its review of the NAPS restart readiness determination plan and VEPCO's plans for the seismic evaluation of future plant modifications, including new and replacement equipment, as documented in its letter dated November 4, 2011. In that letter, VEPCO committed to include the seismic ground acceleration and derived In-structure

D. Heacock -2 Response Spectra from both the existing DBE and the August 23, 2011, earthquake in any future seismic analysis to determine the maximum bounding design values for future modifications. This commitment will be documented in the NAPS Updated Final Safety Analysis Report. In addition, the NRC staff has performed confirmatory inspections and completed its technical evaluation.

The NRC staff has concluded that VEPCO has acceptably demonstrated that no functional damage has occurred to those features necessary for continued operation, and that NAPS can be operated, without undue risk to the health and safety of the public. The NRC also finds VEPCO's commitment for future plant modifications reasonable and acceptable.

Further, VEPCO has provided the information requested by the NRC to support its evaluation, as discussed in CAL 2-2011-001 of September 30,2011. Therefore, the NRC has concluded that VEPCO has satisfactorily completed all commitments as stated in the September 30,2011, CAL.

The basis for the NRC's determination is detailed in the enclosed technical evaluation.

c/~

Eric J. Leeds, Director Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339

Enclosure:

As stated cc w/encl: Listserv

D. Heacock -2 Response Spectra from both the existing DBE and the August 23, 2011, earthquake in any future seismic analysis to determine the maximum bounding design values for future modifications. This commitment will be documented in the NAPS Updated Final Safety Analysis Report. In addition, the NRC staff has performed confirmatory inspections and completed its technical evaluation.

The NRC staff has concluded that VEPCO has acceptably demonstrated that no functional damage has occurred to those features necessary for continued operation, and that NAPS can be operated, without undue risk to the health and safety of the public. The NRC also finds VEPCO's commitment for future plant modifications reasonable and acceptable.

Further, VEPCO has provided the information requested by the NRC to support its evaluation, as discussed in CAL 2-2011-001 of September 30, 2011. Therefore, the NRC has concluded that VEPCO has satisfactorily completed all commitments as stated in the September 30, 2011, CAL.

The basis for the NRC's determination is detailed in the enclosed technical evaluation.

Sincerely, IRA!

Eric J. Leeds, Director Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339

Enclosure:

As stated cc w/encl: Listserv DISTRIBUTION:

LPL2-1 R/F RidsNrrDeEvib Resource RidsNrrLAJBurkhardt Resource Public RidsNrrDorlDpr Resource RidsNrrPmNorthAnna Resource RidsAcrsAcnw MailCTR RidsNrrDorlLpl2-1 Resource RidsOgcRp Resource RidsNrrDeEeeb Resource RidsNrrDraAfpb Resource RidsRgn2MailCenter Resource RidsNrrDeEicb Resource RidsNrrDraApla Resource MKhanna, NRR RidsNrrDeEmcb Resource RidsNrrDssSbpb Resource BMartin, NRR RidsNrrDeEpnb Resource RidsNrrDssScvb Resource PBoyle, NRR RidsNrrDeEptb Resource RidsNrrDssSnpb Resource CGratton, NRR RidsNrrDeEsgb Resource RidsNrrDssSrxb Resource PLambert, NRR

• via memo; **via email ADAMS Accession Nos. PackaQe ML11308B404, Letter ML113088405 SE ML1 13OB406 OFFICE NRRIDORUlPl2-1IPM NRRJDORUlPl2-1IPM NRRIDORUlPl2-2ILA NRRIDEIEICBIBC NRRJDEIEMCBIBC NRRIDEIEVIBIBC NAME RMartin PBoyle JBurkhardt GWilson" KManoly" HGonzalez' DATE 1111112011 111812011 111812011 111112011 1111012011 111312011 OFFICE NRRJDEIEEEB/BC NRRIDEIESGBIBC NRRIDRJEPNBIBC NRRJDE/EPTBIBC NRRJDRAlAFPB/BC NRRIDRAIAPLAfBC NAME JAnderson" VCusumano" Tlupold" AMcMurtray" AKlein' DHarrison" DATE 1012712011 1111/2011 1113/2011 111112011 10/3112011 1015/2011 OFFICE NRR/DSS/SBPB/BC NRRJDSS/SCVB/BC NRR/DSSlSNPB/BC NRR/DSS/SRXB/BC RII/DRP/PRB5/BC NRR/DORUBC NAME GCasto" RDennig' AMendiola" AUlses" GMcCoy" MKhanna DATE 11/4/2011 10121/2011 10/24/2011 10/13/2011 11/1112011 11/11/2011 OFFICE NRRIDORUD OGC NRR/D NAME MEvans EWiliiamson" Eleeds DATE 11111/2011 11110/2011 11/11/2011 OFFICIAL RECORD COpy