ML18153A448
| ML18153A448 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 09/25/1997 |
| From: | Edison G NRC (Affiliation Not Assigned) |
| To: | Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 9710060398 | |
| Download: ML18153A448 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Mr. J.P. O'Hanlon Senior Vice President - Nuclear Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060 September 25, 1997
SUBJECT:
SURRY POWER STATION UNITS 1 AND 2 - APPENDIX R FIRE ISSUES
Dear Mr. O'Hanlon:
The purpose of this letter is to document the NRC staff's acceptance of your compensatory measures for two 10 CFR Part 50, Appendix R fire issues until the plant is brought into compliance with Appendix R.
In telephone cdnversations with Virginia Electric and Power Company (VEPCO) staff on July 31 and August 5, 1997, two issues were discussed. These issues and your compensatory actions have been documented in your letter dated August 27, 1997.
The first issue concerns the potential loss of the Uninterruptible Power Supply (UPS) as a result of a control room fire and a lack of electrical isolation from the control room.
This, in turn, would cause loss of parameter indications on the Appendix R remote shutdown panel as well as loss of the ~emote monitoring panel.
The second issue concerns circuit breaker coordination and sequential tripping of breakers. A postulated high fault current could result in the main vital bus breaker*
tripping prematurely.
VEPCO's compensatory measures for each issue were discussed in the telephone conversations.
The compensatory measures for the UPS electrical isolation issue consist of manually isolating.the control room (fire-affected) vital busses from the UPS, repowering the UPS and then the remote panels.
VEPCO described procedures, specfal equipment provided, and trained staff to accomplish the isolation and repower the remote panels within 30 minutes.
The compensatory measures for the second issue, breaker coordination, consist of restoring vital busses supplying Appendix R equipment on an as needed basis.
Again, procedures, training, and special equipment were stated by VEPCO to be in place to accomplish the required actions in a timely manner.
The NRC found the compensatory measures provide the reasonable assurance needed to assure that vital electrical loads, the UPS, and remote shutdown panel can be recovered in the event of a fire in the main control room.
Additionally, the staff considers these interim compensatory measures to be short term and will be maintained in effect until the required plant modifications are made.
On August 25, 1997, the NRC staff observed the special equipment and walked down the areas at the site where actions would be taken.
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- VEPCO has committed to make permanent modifications at the next refueling outage for each unit (October 1997 for Unit 2 and October 1998 for Unit 1) to obviate these issues, eliminate the need for compensatory actions, and bring both units into comp]iance with Appendix R.
Docket Nos. 50-280 and 50-281 cc:
See next page Distribution
~0G!<iet2...F+lef PUBLIC PDII-1 RF B. Boger OGC ACRS P. Madden L. Whitney E. Connell L. Marsh P. Qualls A. Bel isle, J. Johnson, C. Julian, RII R. Musser, RII J. Lyons RII RII FILENAME - G:\\SURRY.FIR OFFICE PM:PDII-1 NAME DATE COPY Sincerely, (Original Signed By)
Gordon E. Edison, Sr. Project Manager Project Directorate II-1 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation
p-Mr. J. P. O'Hanlon Virginia Electric and Power Company cc:
Mr. Michael W. Maupin, Esq.
Hunton and Williams Riverfront Plaza, East Tower 951 E. Byrd Street Richmond, Virginia 23219 Mr. David Christian, Manager Surry *Power Station Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883
- Senior Resident Inspector Surry Power Station U. S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Vi rgi ni a 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 P. 0. Box 1197 Richmond, Virginia 23209 Regional Administrator, Region II U.S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303 Robert B. Strobe, M.D., M.P.H.
State Health Commissioner Office of the Commissioner Virginia Department of Health P. 0.
- Box 2448 Richmond, Virginia 23218 Surry Power Station Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. J. H. McCarthy, Manager Nuclear Licensing & Operations Support Innsbrook Technical Center Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. Al Belisle U.S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303 Mr. W. R. Matthews, Manager North Anna Power Station P. 0. Box 402 Mineral, Virginia 23117