ML081900464

/2, Request for Additional Information Regarding Proposed License Amendment Request (TAC MD7242 and MD7243)

ML081900464
Person / Time
Site:	North Anna
Issue date:	07/09/2008
From:	Siva Lingam NRC/NRR/ADRO/DORL/LPLII-1
To:	Christian D Virginia Electric & Power Co (VEPCO)
Lingam, Siva NRR/DORL 415-1564
References
TAC MD7242, TAC MD7243
Download: ML081900464 (5)

Text

July 9, 2008 Mr. David A. Christian 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, REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING PROPOSED LICENSE AMENDMENT REQUEST TO REVISE LIMITING CONDITION FOR OPERATIONS 3.8.7 AND 3.8.9 TO SUPPORT SHARED COMPONENT OPERABILITY ON THE OPPOSITE UNIT (MD7242 AND MD7243)

Dear Mr. Christian:

By letter dated October 24, 2007, Virginia Electric and Power Company submitted an amendment request in the form of changes to the technical specifications (TSs) to Facility Operating License Numbers NPF-4 and NPF-7 for North Anna Power Station, Unit Nos. 1 and 2, respectively. The proposed changes will revise the TSs Limiting Condition for Operations (LCO) 3.8.7 and 3.8.9, pertaining to electrical power systems and distribution associated with the 120 volt AC vital bus inverters. The TS changes are intended to support operability of components shared between Unit 1 and Unit 2. The proposed changes will add new conditions, Required Action statements and Completion Times for LCO 3.8.7 and LCO 3.8.9 to address shared components. The Nuclear Regulatory Commission (NRC) staff is reviewing the submittal and has determined that additional information is required to complete its evaluation.

The NRC staffs RAI is enclosed. The licensee is required to provide a response to the RAI within 30 days.

Sincerely,

/RA/

Siva P. Lingam, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-338 and 50-339

Enclosure:

RAI cc w/encl: See next page

ML081900464 *transmitted by memo dated OFFICE NRR/LPL2-1/PM NRR/LPD2-1/LA NRR/DE/EEEB/BC NRR/LPL2-1/BC NAME SLingam MOBrien GWilson MWong DATE 7/2/08 7/9/08 6/26/08* 7/9/08 North Anna Power Station, Units 1 & 2 cc:

Mr. David A. Christian Mr. Daniel G. Stoddard President and Chief Nuclear Officer Site Vice President Virginia Electric and Power Company North Anna Power Station Innsbrooks Technical Center Virginia Electric and Power Company 5000 Dominion Boulevard Post Office Box 402 Glen Allen, VA 23060-6711 Mineral, Virginia 23117-0402 Mr. C. Lee Lintecum Dr. Robert B. Stroube, MD, MPH County Administrator State Health Commissioner Louisa County Office of the Commissioner Post Office Box 160 Virginia Department of Health Louisa, Virginia 23093 Post Office Box 2448 Richmond, Virginia 23218 Ms. Lillian M. Cuoco, Esq.

Senior Counsel Mr. Eric Hendrixson, Director Dominion Resources Services, Inc. Nuclear Safety & Licensing 120 Tredegar Street, RS-2 Virginia Electric and Power Company Richmond, VA 23219 North Anna Power Station P.O. Box 402 Dr. W. T. Lough Mineral, VA 23117 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 P. O. Box 490 Mineral, Virginia 23117

REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION OF TECHNICAL SPECIFICATION ASSOCIATED WITH LIMITING CONDITION FOR OPERATIONS 3.8.7 AND 3.8.9 TO ADDRESS SHARED COMPONENTS NORTH ANNA POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-338 AND 50-339 By application dated October 24, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML072980167), Virginia Electric and Power Company (the licensee) proposed a license amendment to change North Anna Power Station, Unit Nos. 1 and 2 Technical Specifications (TSs). The proposed changes will revise the TSs Limiting Condition for Operations (LCO) 3.8.7 and 3.8.9, pertaining to electrical power systems and distribution associated with the 120 volt AC vital bus inverters. The TS changes are intended to support operability of components shared between Unit 1 and Unit 2. The proposed changes will add new conditions, Required Action statements and Completion Times for LCO 3.8.7 and LCO 3.8.9 to address shared components.

To complete our review of the proposed TS changes, the U. S. Nuclear Regulatory Commission staff requests the licensees response to the following:

1. In the proposed TSs, LCO 3.8.7, Action B, it is stated that in case: One or more inverters required by LCO 3.8.7.b inoperable, Declare associated shared components inoperable.

Provide the following information related to the above statement (preferably in the tabular form):

a. Specific Inverter(s) out.

b. Specific associated component(s) inoperable.

c. Describe how this component becomes inoperable. Provide reference drawing number from where this information can be verified, if necessary.

d. Provide the associated system which becomes inoperable due to the associated component(s) being inoperable. Provide the associated system LCO.

2. In the proposed TS, LCO 3.8.9, Action F, it is stated that in case: One of more required LCO 3.8.9.b AC vital electrical power distribution subsystem(s) inoperable, Declare associated shared components inoperable.

Provide the following information related to the above statement (preferably in the tabular form):

a. Specific AC vital electrical power distribution subsystem(s).

b. Specific associated component(s) inoperable.

Enclosure

c. Describe how this component becomes inoperable. Provide reference drawing number from where this information can be verified, if necessary.

d. Provide the associated system which becomes inoperable due to the associated component(s) being inoperable. Provide the associated system LCO.