ML20094B352

Informs of Rev to Commitment Made in for Posting Security Officer at Svc Water Pump House During Svc Water Restoration.Security Officer Will No Longer Be Posted at Svc Water Pump House

ML20094B352
Person / Time
Site:	North Anna
Issue date:	10/26/1995
From:	Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
95-556, NUDOCS 9510310416
Download: ML20094B352 (2)

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VIRGINIA ELECTRIC AND Powan COMPANY Ricitwowl),VmorNIA 202 GI October 26, 1995 U.S. Nuclear Regulatory Commission Serial No.95-556 Attention: Document Control Desk NAPS /JHL Washington, D.C. 20555 Docket Nos. 50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 CHANGE IN COMMITMENT FOR SECURITY POSTING AT THE SERVICE WATER PUMP HOUSE DURING SERVICE WATER RESTORATION in our letters dated March 29,1985 and July 1,1985, Virginia Electric and Power

' Company submitted information requesting a change to Technical Specification 3.7.4.

The change permits the use of a 168-hour action statement during the restoration of the service water system.

Your letter dated August 9,1985 requested additional information pertaining to the  ;

license amendment request. This request for additional information reflected concern about the potential flooding of buildings containing safety related equipment when the service water headers were opened for cleaning. As a result, the following measures were committed to, in our letter dated August 22,1985, for any 168-hour service water action statem6nts which created the potential for flooding:

!' 1. Manual boundary valves would be tagged closed and then verified closed by a

! second individual.

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! 2. Motor operated boundary valves would be closed, tagged, verified by a second j individual, and the power removed from the motor circuit.

3. Boundary valves greater than or equal to 18 inches would be chained and locked in the closed position.

4. An Abnormal Procedure would be developed for response to postulated

flooding which would include posting a " valve watch" operator in the Auxiliary

Building basement to take appropriate action in the event of flooding.

i l 5. The cubicles housing the charging pumps in the Auxiliary Building basement i would be sealed to prevent inleakage in the event of a flood outside of the

i. . cubicles.

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6. A Security Officer would be posted at the service water pump house to ensure that the closed and locked pump discharge valves would not be tampered with.

The NRC approved the license amendment request by letter dated October 25,1985 with the issuance of License Amendment Nos. 70 and 56. The associated Safety Evaluation Report stated, "Also, constant on-location surveillance by plant personnel will minimize the possibility of a flooding occurring."

This letter is to inform you that we are revising our commitment for posting a Security Officer at the service water pump house. As part of the security system upgrades, access to the service water pump house has come under more strict control. The service water pump house currently remains locked and alarmed. We have determined that this mode of control is comparable to Protected Area access in that the Security Department controls who has access to the area. These service water pump house valves will be treated similar to the other closed, chained, and locked valves in the service water system when service water restoration activities are ongoing (i.e., no constant security personnel surveillance). These controls are considered adequate 1 l

and equivalent to the original commitment. Therefore, a Security Officer will no longer be posted at the service water pump house during service water system restoration activities that could have the potential for flooding.

It should be noted that this change in commitment does not change the requirement for security postings to prevent unauthorized personnel access into the Protected Area or a Vital Area. These security postings will be imposed whenever openings in the l I

service water piping would permit such unauthorized access.

If you have any questions, please contact us.

Very truly yours, Y@

James P. O'Hanlon W of~

Senior Vice President - Nuclear cc: U.S. Nuclear Regulatory Commission Region 11 101 Marietta Street, N.W.

Suite 2900 Atlanta, Georgia 30323 Mr. R. D. McWhorter NRC Senior Resident Inspector North Anna Power Station j l

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