ML18153B155
| ML18153B155 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 10/31/1994 |
| From: | Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 9411300083 | |
| Download: ML18153B155 (4) | |
Text
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Octa ber 31, 1994 Virginia Electric and Power Company ATTN:
Mr. J. P. O'Hanlon Senior Vice President - Nuclear Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060
SUBJECT:
NOTICE OF ENFORCEMENT DISCRETION FOR VIRGINIA ELECTRIC AND POWER COMPANY (VEPCO) REGARDING SURRY POWER STATION, UNIT 2 Gentlemen:
By letter dated October 28, 1994, you requested relief from the required actions in Surry Technical Specification (TS) 3.16.B.3. This TS requires that one battery may be inoperable for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided that the other battery and battery chargers remain operable with one battery charger carrying the DC load of the failed battery's supply system.
If the battery is not returned to operable status within the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period, the reactor shall be placed in the hot shutdown condition.
Your staff informed the Nuclear Regulatory Commission (NRC) on October 27, 1994, that in order to perform maintenance on Station Battery 2A it would take an additional 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> beyond what is stated in the TS.
This maintenance includes disconnecting a degrading cell and potentially one adjoining cell from Station Battery 2A.
Your letter provided the following justification for continued operation.
The operation of Unit 2 with a station battery with at least 58 cells does not create any immediate threat to safety. Battery capacity remains acceptable with adequate margin to supply the loads on the DC bus if required.
Existing engineering analyses and supporting calculations performed in accordance with IEEE Standard 485-1983, IEEE Recommended Practice for Sizing Large Lead Batteries for Generating Stations and Substations, allow two cells within a Station Battery to be taken out of service with no significant reduction in load margin.
A review of performance and service test data found Battery 2A performance acceptable following maintenance.
The minimum acceptance criterion for one individual station battery cell is greater than 2.07 volts.
The current voltage reading for cell 52 is 2.068 volts with a degrading trend rate.
No other cells in the station battery show any signs of degradation.
The two station battery chargers remain operable and are designed to carry the load of the associated DC bus if required.
Based on our review of the situation and of your justification for continued operation, we conclude that plant safety will not be unduly compromised and we are satisfied that such action is in the best interest of the public health and safety. Therefore, it is our intention to exercise discretion not to enforce compliance with TS 3.16.B.3 for a period of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> commencing on October 28, 1994, at 11:00 a.m., and ending on October 29, 1994, at 11:00 a.m.
This discretion was granted by the Regional Administrator and verbally conveyed to M. L. Bowling, Virginia Electric and Power Company, by yfrt/
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.££3 9411300083 941031 PDR ADOCK 05000281 P
PDR OFFICIAL COPY
VEPCO 2
D. M. Verrelli and G. A. Belisle, NRC, on October 28, 1994.
It is our understanding that you resolved the problem and exited the action statement at 6:15 p.m. on October 28, 1994.
Therefore, this discretion has been terminated.
It is our understanding that you are planning to replace the affected cell(s) during the upcoming Unit 2 refueling outage currently scheduled for February 1995.
It is also our understanding that a TS change submittal is being prepared that will correct the descriptive reference to the Station Batteries in TS 4.6.C.l and will be forwarded within 30 days.
This decision does not preclude the NRC from considering enforcement action for the conditions that led to the need for this Notice of Enforcement Discretion.
Please notify me immediately if your understanding differs from that stated in the above.
NOED 94-2-007 Docket No.
50-281 License No.
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cc:
M. L. Bowling, Manager Sincerely, Orig signed by Luis A. Reyes for Stewart D. Ebneter Regional Administrator Nuclear Licensing and Programs, VEPCO Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060 David A. Christian, Station Manager Surry Power Station P. 0. Box 315 Surry, VA 23883 Ray D. Peace, Chairman Surry County Board of Supervisors P. 0. Box 130 Dendron, VA 23839 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation P. 0. Box 1197 Richmond, VA 23209 (cc cont'd - See page 2)
e VEPCO cc:
(Continued)
Michael W. Maupin Hunton and Williams Riverfront Plaza, East Tower 951 E. Byrd Street Richmond, VA 23219 Robert B. Strobe, M.D., M.P.H.
State Health Commissioner Virginia Department of Health P. 0. Box 2448 Richmond, VA 23218 Attorney General Supreme Court Building 101 North 8th Street Richmond, VA 23219 3
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Yes VEPCO Distribution:
S. Ebneter, RII R. Zimmerman, NRR M. Thadani, NRR S. Varga, NRR J. Lieberman, OE L. Garner, RII B. Buckley, NRR G. Hallstrom, RII PUBLIC e
NRC Resident Inspector U.S. Nuclear Regulatory Commission Surry Nuclear Power Station 5850 Hog Island Road Surry, VA 23883 NRC Resident Inspectpr U.S. Nuclear Regulatory Commission Route 2, Box 78-A Mineral, VA 23117
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