ML071490231
| ML071490231 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 05/31/2007 |
| 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 MD4622, TAC MD4623 | |
| Download: ML071490231 (5) | |
Text
May 31, 2007 Mr. David A. Christian Senior Vice 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 REVISE TECHNICAL SPECIFICATION FOR TEMPORARY 45-DAY AND 14-DAY ALLOWED OUTAGE TIMES TO REPLACE CHILLED WATER PIPING IN MAIN CONTROL ROOM AND EMERGENCY SWITCHGEAR ROOM AIR-CONDITIONING SYSTEM (TAC NOS. MD4622 AND MD4623)
Dear Mr. Christian:
By letter dated February 26, 2007, as supplemented by letters dated April 5 and May 14, 2007, Virginia Electric and Power Company (the licensee) proposed technical specification (TS) changes for Surry Power Station, Unit Nos. 1 and 2, related to the main control room and emergency switchgear room air-conditioning system.
The proposed changes would revise TS 3.23 to temporarily extend the allowable outage time associated with an inoperable chilled water loop from 7 days up to 45 days. The temporary change has been proposed in order to permit repairs, replacement, and modifications to the chilled water piping. 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 requested to provide a response to the RAI within 30 days.
Sincerely, 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.
NRR-088 OFFICE NRR/LPL2-1/PM NRR/LPD2-1/LA NRR/DSS/SCVB/BC NRR/DRA/AADB/BC NRR/LPL2-1/BC NAME SLingam:nc MOBrien RDennig MHart EMarinos DATE 05 / 29 /07 05 /30 /07 5/18/07*
5/22/07*
05 / 31 /07
Enclosure REQUEST FOR ADDITIONAL INFORMATION REGARDING REVISION OF TECHNICAL SPECIFICATION FOR 45-DAY AND 14-DAY ALLOWED OUTAGE TIMES TO REPLACE MAIN CONTROL ROOM AND EMERGENCY SWITCHGEAR ROOM AIR-CONDITIONING SYSTEM CHILLED WATER PIPING SURRY POWER STATION, UNIT NOS. 1 AND 2 DOCKET NOS. 50-280 AND 50-281 1.
With regard to the attachment to your letter dated April 5, 2007 (Agencywide Documents Access and Management System (ADAMS) Accession Number ML070960037), please provide additional details of the procedure that will be in place for notification of impending abnormal weather conditions including tornadoes and hurricanes. For example, would an individual be assigned to remain ready to receive immediate and direct notification of approaching severe weather as issued by the National Oceanic and Atmospheric Administration (NOAA)? How would the individual receive the notification (e.g., by a direct telephone call from the local National Weather Service forecast office, by continuously monitoring the appropriate NOAA weather radio channel)? What information would be obtained and what is the estimated time frame for acquisition?
2.
Page 5 of the attachment to your letter dated April 5, 2007, notes that measures would be taken if a tornado watch or warning has been declared for Surry County. What length of time would be required to suspend activities to a safe level once NOAA issued either of these declarations? In particular, page 6 of the attachment states that actions would be taken upon declaration of a tornado warning for Surry County. The Nuclear Regulatory Commission staff notes that issuance of a tornado warning means that a tornado has been sighted or indicated by weather radar. Therefore, please provide justification that adequate time remains to suspend activities to a safe level if it is likely that one or more tornadoes have already formed in the general site area. How large is Surry County and where is the Surry Power Station located within the county? That is, given that severe weather conditions may cover a large area, may move quickly, and that predicting with complete assurance when and where tornadoes will develop and move within the severe storm area is not realistic, please justify that basing decisions to take action on a declaration for Surry County is sufficient.
3.
Does the Protected Equipment program include required support equipment (e.g.,
emergency power supply and associated breakers, fire protection, flood protection, etc.
needed to assure operation of the Protected Equipment)?
4.
Are portable equipment and material located near Protected Equipment or near Protected Equipment piping secured to prevent damage to the Protected Equipment or piping during a seismic event?
5.
Are the non-safety water chillers (Service Building water chillers 1-VS-E-3A and 1-VS-E-3B) in scope for the Maintenance Rule? If they are, are they classified as (a)1 or (a)2?
6.
What is the Maintenance Rule classification for the main control room (MCR) and emergency switchgear room (ESGR) water chillers and Air Handling Units (AHUs) ((a)1 or (a)2)?
7.
Are Maintenance Risk Assessments for equipment out-of-service updated daily to account for plant changes and for forecasted weather?
8.
The increased Allowed Outage Time (AOT) for the Chilled Water System increases the probability of a loss of both trains of cooling to the MCR and to the ESGR. Has an analysis been completed, including the effect of heat stress on the operators and high area temperatures on equipment and instrumentation, showing both units can be shutdown in accordance with the Technical Specifications (TS 3.23.C.2) during design basis high ambient temperature days with a loss of all cooling to the MCR and to the ESGR?
Surry Power Station, Units 1 & 2 cc:
Mr. David A. Christian Senior Vice 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