ML081490316

Request for Additional Information Regarding the Revision of Technical Specification 4.4, Pertaining to the Containment Leakage Rate Testing Program

ML081490316
Person / Time
Site:	Surry
Issue date:	05/29/2008
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 MD7535
Download: ML081490316 (4)

Text

May 29, 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:

SURRY POWER STATION, UNIT NO. 2, REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE REVISION OF TECHNICAL SPECIFICATION 4.4, PERTAINING TO THE CONTAINMENT LEAKAGE RATE TESTING PROGRAM (TAC NO. MD7535)

Dear Mr. Christian:

By letter dated December 17, 2007, Virginia Electric and Power Company (the licensee) proposed Technical Specification (TS) changes to permit a one-time 5-year exception to the 10-year frequency of the performance-based leakage rate testing program for Type A tests, as required by Regulatory Guide 1.163 for Surry Power Station, Unit No. 2. 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 No. 50-281

Enclosure:

RAI cc w/encl: See next page

ML081490316 *transmitted by memo dated OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/DRA/APLA/BC NRR/LPL2-1/BC NAME SLingam MO=Brien MRubin MWong DATE 5/28/08 5/28/08 5/21/08* 5/29/08 REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION OF TECHNICAL SPECIFICATION PERTAINING TO THE CONTAINMENT LEAKAGE RATE TESTING PROGRAM SURRY POWER STATION, UNIT NO. 2 DOCKET NO. 50-281 By application dated December 17, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML073511682), Virginia Electric and Power Company (the licensee) proposed a license amendment to change Surry Power Station, Unit No. 2 (Surry 2)

Technical Specifications (TSs). The proposed change would permit a one-time 5-year exception to the 10-year frequency of the performance based leakage rate testing program for Type A tests, as required by Regulatory Guide (RG) 1.163.

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

1. Identify the Probabilistic Risk Analysis (PRA) version used to support the integrated leak rate testing extension request. Discuss the reasons for the significant change in the core damage frequency (CDF) and the intact containment frequency relative to the PRA version used to support license renewal (i.e., a reduction in CDF from 3.8E-5 to 2.93E-5 per year and a reduction in intact containment frequency from 2.2E-5 to 3.17E-6 per year.)

2. Table A-2 of Attachment 2 to your letter dated December 17, 2007, provides the estimated population dose for each Electric Power Research Institute (EPRI) accident class based on the frequency-weighed sum of the doses provided in Table A-1 of your letter dated December 17, 2007. However, the population doses reported in Table A-2 for EPRI Classes 2, 7, and 8 are inconsistent with the frequency-weighed sum of the doses from Table A-1.

Although the correct dose values were used for Classes 7 and 8 in the main report (e.g.,

Table 2 of your letter dated December 17, 2007), the incorrect dose value was used for Class 2. Please reconcile the population dose values provided in Tables A-1, A-2, and 2, and update the risk assessment as appropriate.

3. The total large early release frequency (LERF) for Surry Power Station, including the requested change, is stated to be 9.79E-7 per year (page 18 of Attachment 2 of your letter dated December 17, 2007). However, this value does not include the contribution to LERF from external events. As stated in Section 2.2.4 of RG 1.174, the risk-acceptance guidelines (in this case, for LERF) are intended for comparison with a full-scope assessment risk assessment, including internal and external events. Consistent with this guidance, and to the extent supportable by the available risk models for Surry Power Station, provide an estimate of the total LERF when external events and the impact of the requested change are included within the assessment.

Enclosure

Surry Power Station, Units 1 & 2 cc:

Mr. David A. Christian Commonwealth of Virginia President and Chief Nuclear Officer 900 East Main Street Virginia Electrical and Power Company Richmond, Virginia 23219 Innsbrook Technical Center 5000 Dominion Boulevard Mr. Chris L. Funderburk, Director Glen Allen, VA 23060-6711 Nuclear Licensing & Operations Support Dominion Resources Services, Inc.

Ms. Lillian M. Cuoco, Esq. Innsbrook Technical Center Senior Counsel 5000 Dominion Blvd.

Dominion Resources Services, Inc. Glen Allen, Virginia 23060-6711 120 Tredegar Street, RS-2 Richmond, VA 23219 Mr. Matt Adams, Director Nuclear Safety & Licensing Mr. Donald E. Jernigan Surry Power Station Site Vice President Virginia Electric and Power Company Surry Power Station 5570 Hog Island Road Virginia Electric and Power Company Surry, Virginia 23883-0315 5570 Hog Island Road Surry, Virginia 23883-0315 Senior Resident Inspector Surry Power Station U. S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Virginia 23883 Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23218 Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218 Office of the Attorney General