ML081710306

North Anna Nuclear Station, Units 1 & 2, Request for Additional Information, Proposed License Amendment Request for a One-Time Extension for Emergency Diesel Generator (TAC Nos. MD7533 and MD7534)

ML081710306
Person / Time
Site:	North Anna
Issue date:	06/24/2008
From:	Lingam S P NRC/NRR/ADRO/DORL/LPLII-1
To:	Christian D A Virginia Electric & Power Co (VEPCO)
Lingam, Siva NRR/DORL 415-1564
References
TAC MD7533, TAC MD7534
Download: ML081710306 (4)

Text

June 24, 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 FOR A ONE-TIME EXTENSION FOR EMERGENCY DIESEL GENERATOR FUEL OIL STORAGE TANK RECOATING (TAC NOS. MD7533 AND MD7534)

Dear Mr. Christian:

By letter dated December 17, 2007 (ML073400457), Virginia Electric and Power Company, (Dominion) submitted an amendment request, in the form of changes to the technical specifications to Facility Operating License Nos. NPF-4 and NPF-7 for North Anna Power Station, Unit Nos. 1 and 2, respectively. The proposed change will allow a one-time extended 14-day completion time for each of the two underground diesel fuel oil storage tanks to permit removal of the current coating and recoating of the tanks in preparation for use of ultra-low sulfur diesel fuel oil. The Nuclear Regulatory Commission (NRC) staff is reviewing the submittal and has determined that additional information is required to complete its evaluation.

The NRC staff's 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

ML081710306 *transmitted by memo dated OFFICE NRR/LPL2-1/PM NRR/LPD2-1/LA NRR/DRA/APLA/BC NRR/LPL2-1/BC NAME SLingam MO'Brien MRubin MWong DATE 6/18/08 6/23/08 6/16/08* 6/24/08

North Anna Power Station, Units 1 & 2 cc: Mr. David A. Christian President and Chief Nuclear Officer Virginia Electric and Power Company Innsbrooks Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711

Mr. C. Lee Lintecum County Administrator Louisa County Post Office Box 160 Louisa, Virginia 23093 Ms. Lillian M. Cuoco, Esq.

Senior Counsel Dominion Resources Services, Inc. 120 Tredegar Street, RS-2 Richmond, VA 23219

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 P. O. Box 490 Mineral, Virginia 23117

Mr. Daniel G. Stoddard Site Vice President North Anna Power Station Virginia Electric and Power Company Post Office Box 402 Mineral, Virginia 23117-0402

Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218

Mr. Eric Hendrixson, Director Nuclear Safety & Licensing Virginia Electric and Power Company North Anna Power Station P.O. Box 402 Mineral, VA 23117

Enclosure REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION OF TECHNICAL SPECIFICATION ASSOCIATED WITH EMERGENCY DIESEL GENERATOR FUEL OIL STORAGE TANK RECOATING NORTH ANNA POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-338 AND 50-339 By application dated December 17, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML073520247), 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 change will permit a one-time extended 14-day completion time for each of the two underground diesel fuel oil storage tanks recoating.

To complete our review of the proposed TS changes, the Nuclear Regulatory Commission staff requests the licensee's response to the following:

1. The licensee's submittal identified that significant findings and observations (F&Os) from the 2001 peer review have either been resolved or found to have no impact on the proposed TS change. The licensee is requested to identify and provide its disposition of the unresolved significant F&Os with regard to this specific application.

2. The licensee is requested to confirm that there are no outstanding (i.e., not incorporated into the baseline probabilistic risk assessment (PRA) model) plant modifications, procedure changes, or other outstanding deficiencies for the current PRA model such that it reasonably reflects the as-built as-operated plant. Further, since this temporary change is not date-limited, provide a commitment to review the PRA results prior to implementation of the TS change to reconfirm this item.

3. The licensee's submittal did not discuss model truncation applicable to its analysis. The licensee is requested to identify and justify the truncation level used for this application.

4. Section 5 of Attachment 2 of the licensee's submittal dated December 17, 2007, identifies sensitivity calculations performed which purportedly support the risk analysis conclusions, however, the specifics of these calculations are not discussed. The licensee is requested to identify and discuss the results of the sensitivity calculations performed.