ML073380704
| ML073380704 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 12/06/2007 |
| 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 MD5877, TAC MD5878 | |
| Download: ML073380704 (3) | |
Text
December 6, 2007 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 NOS. 1 AND 2, REQUEST FOR ADDITIONAL INFORMATION (RAI) REGARDING THE PROPOSAL TO INCREASE MAXIMUM SERVICE WATER TEMPERATURE LIMIT (TAC NOS. MD5877 AND MD5878)
Dear Mr. Christian:
By letter dated June 25, 2007, Virginia Electric and Power Company (the licensee) proposed technical specification (TS) changes to increase the maximum service water temperature limit from 95 °F to 100 °F for Surry Power Station, Unit Nos. 1 and 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 Nos. 50-280 and 50-281
Enclosure:
RAI cc w/encl: See next page
- transmitted by memo dated OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/DSS/SCVB/BC NRR/LPL2-1/BC NAME SLingam MO=Brien RDennig EMarinos DATE 12/5/07 12/5/07 11/28/07*
12/6/07
REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION OF TECHNICAL SPECIFICATION TO INCREASE MAXIMUM SERVICE WATER TEMPERATURE LIMIT SURRY POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-280 AND 50-281
- 1.
Licensing amendment request (LAR) dated June 25, 2007 (Agencywide Documents and Management System (ADAMS) Accession No. ML071840169), Attachment 1, page 7 of 33, under heading LOCA Containment Depressurization Analyses, second paragraph states Maximum initial containment air is generally conservative for determining CDT. Please provide appropriate justification for this statement.
- 2.
Provide a revised evaluation of the recirculation spray system heat exchanger performance with the new service water (SW) inlet temperature of 100 °F similar to the evaluation given in Surry Power Station, Unit Nos. 1 and 2 (Surry 1 and 2), Updated Final Safety Analysis Report (UFSAR), Section 6.3.1.4, fifth paragraph. With the revised maximum service water temperature of 100 °F, please confirm that the heat exchanger meets its design requirement under the worst conditions of fouling and tube plugging and also meets the intent of Title 10 of the Code of Federal Regulations, Part 50, Appendix A, General Design Criterion 38.
- 3.
Please refer to response to request for additional information (RAI) No. 2 in Dominion letter dated November 14, 2007 (ADAMS Accession No. ML073190271). Please provide the test procedure and test report for this test which should include information on the following items:
(a) The number of hours main control room (MCR) and emergency switchgear room (ESGR) envelope were tested with 100 °F SW temperature (b) Description of the method by which the SW temperature was maintained at 100 °F during the test period, and (c) Test results and conclusions
- 4.
UFSAR Section 9.13.2 states The emergency switchgear and relay rooms are designed for 80 °F dry bulb during normal conditions. Dominion response to RAI No. 2 in letter dated November 14, 2007, states the testing was done to demonstrate MCR/ESGR envelope space temperature could be maintained within the operating range 75 °F to 85 °F. Is the ESGR design temperature being revised from 80 °F to 85 °F? If so, what is the impact on qualification of equipment located in ESGR?
Enclosure
Surry Power Station, Units 1 & 2 cc:
Mr. David A. Christian President and Chief Nuclear Officer Virginia Electrical and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Ms. Lillian M. Cuoco, Esq.
Senior Counsel Dominion Resources Services, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, Connecticut 06385 Mr. Donald E. Jernigan Site Vice President Surry Power Station Virginia Electric and Power Company 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 Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711