ML20148J189

Informs That Util Intends to Install Permanent N-16 primary- to-secondary Leak Detection Sys by 881101 Instead of 880401, Due to Time Required for Installation,Calibr,Testing & Verification of Permanent Sys

ML20148J189
Person / Time
Site:	North Anna
Issue date:	03/25/1988
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
87-640A, NUDOCS 8803300198
Download: ML20148J189 (2)

Text

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VinoINIA ELucTHIC ANI) Pownn COMPANY Ricnwoxx).VruarxrA 2a2 61 W.L.Staw4mr E."dE/.'."E.

March 25, 1988 U. S. Nuclear Regulatory Commission Serial No.

87-640A Attn: Document Control Desk E&C: BSD/psj:2140 Washington, D.C.

20555 Docket Nos.

50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:

llBGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 N-16 PRIMARY TO SLCONDAR'T LEAK DETECTION SYSTEM Virginia Electric and Power Company stated in the attachment to our letter of November 4,1987 (Serial No.87-640), that it was our intention to complete installation of our permanent N-16 Primary to Secondary Leak Detection System by April 1, 1988.

We have reviewed our action plan for this schedule and find this completion date is not attainable for several reasons.

We are procuring the N-16 detection systems from Merlin-Gerin, a French firm, through their U.S.

agent.

Since ours are among the first systems to be purchased and permanently installed in the U.S., we are finding it necessary to engage in detailed commercial and technical interfaces to obtain the equipment.

These reviews are also necessary to assure that the delivered systems will satisfy the Company's performance requirements and to assure that the design includes human factors considerations.

We are, for example, changing the control room touchpad graphics to use English-based nomenclature rather than French (metric) based. We have conferred with a representative of Merlin-Gerin in our offices and have had our personnel travel to France in order to expedite the design interface.

We have encountered certain problems in maintaining the temporary N-16 system.

We, in conjunction with the manufacturer and his U.S. agent, are addressing these problems.

It is our intent to correct the problems and have the resolutions incorporated into the permanent system design.

As we have previously stated, these units will be among the first systems to be installed; therefore, they will require extensive calibration and system performance verification.

An extensive verification period is required to assure reliable equipment operating characteristics and performance.

It is also required to collect data which will be forwarded to the manufacturer for his review.

This verification period will last for approximately six months after the installation of the system has been completed.

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6 Based on our progress to date, the presently projected delivery date, the time required for installation, calibration, testing and. verification of the permanent system, completion by April 1,1988 is not possible.

Therefore, we now intend to have the permanent N-16 Primary to Secondary Leak Detection System installed by November 1, 1988.

We will inform you of any further change to this schedule.

In the interim, we will continue to operate our presently installed temporary N-16 System.

If you have any questions, please contact me.

Very truly yours, W. L.

wart cc:

U. S. Nuclear Regulatory Commission 101 Marietta Street Suite 2700 Atlanta, GA 30323 Mr. J. L. Caldwell Senior Resident Inspector North Anna Power Station j

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