ML20108B572

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Forwards VEPCO Proposed Program,Mechanical Cleaning & Valve Repair Svc Water Sys,North Anna Power Station, Per 841002 & 1204 Meetings.Concurrence in Program Requested by 850415. Amend to Tech Spec 3/4.7.4 Will Be Submitted in Mar 1985
ML20108B572
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 02/27/1985
From: Stewart W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To: Harold Denton, John Miller
Office of Nuclear Reactor Regulation
Shared Package
ML20108B575 List:
References
85-035, 85-35, NUDOCS 8503070384
Download: ML20108B572 (2)


Text

.- e4 VIRGINIA ELECTRIC AND PownH CoxrAxy RIcnxoxn,VINGINIA 20261 W.L.SrawAmr x[27d"[,T,7o.. February 27, 1985 Mr. Harold R. Denton, Director Serial No.85-035 Office of Nuclear Reactor Regulation N0/JHL:pa Attn: Mr. James R. Miller, Chief Docket Nos. 50-338 Operating Reactors Branch No. 3 50-339 Division of Licensing License Nos. NPF-4 U.S. Nuclear Regulatory Commission NPF-7 Washington, D. C. 20555 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNIT NOS. 1 AND 2 MECHANICAL CLEANING OF THE SERVICE WATER PIPING AND VALVE REPAIRS On October 2, 1984 and again on December 5, 1984, VEPCO held meetings with the NRC Staff to discuss the removal of corrosion from the North Anna service water system piping and valves. At these meetings the solution to the corrosion problems and the mechanical cleaning program to be implemented at North Anna were also discussed. As a result of these meetings, VEPCO has prepared the enclosed submittal which addresses the NRC Staff's various comments and documents the mechanical cleaning methodology to be used.

This mechanical cleaning program has been reviewed and approved by the Station Nuclear Safety and Operating Committee (SNSOC). It has been determined that this mechanical cleaning program does not involve an unreviewed cafety question as defined in 10CFR50.59 and does not pose a significant hazards consideration as defined in 10CFR50.92. The proposed program does result in soue increase in the probability of the loss of service water flow during periods when one of the redundant service water loops is inoperable. However, operation in this mcde ' is permitted by the Technical Specifications. The remaining shared radundant service water loop has the capability to provide heat rejection and supply cooling water to the various components required for both normal operation and accident conditions. Isolation of the service water system will be done only when necessary and will be controlled by station compensatory measures as described in the

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administrative procedures and enclosure.

In addition, each of the work packages that is described in the enclosure will be developed and administered under the Design Cc.. trol Program and Quality Assurance Program and approved by SNSOC prior to implementation. Each work package will include requirements for precautions to minimize risks and impact on normal operation.

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ViaOIMIA Etzersic Awo Powra COMPANY TO Mr. Harold R. Danton VEPCO proposes to begin implementing the mechanical cleaning for Technical Specification related work during April, 1985. We are currently proceeding with the mechanical cleaning of the non-Technical Specification related work delineated in the enclosure. We request NRC concurrence in our Mechanical Cleaning Program as defined herein by April 15, 1985.

VEPCO will submit in March, 1985, a license amendment to extend the action statement of Technical Specification 3/4.7.4. Upon NRC approval of the amendment to extend the action statement time requirements, VEPCO will use the revised Technical Specification with the program for the mechanical cleaning of the service water system piping and valves.

Very truly yours,

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W. L. Stewart Enclosure cc: Dr. J. Nelson Grace Regional Administrator Region II Mr. M. W. Branch NRC Resident Inspector North Anna Power Station

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