ML20063L534

Lists Control Room Instrumentation & Annunciators Affected During Operation W/Reactor Coolant Loop Removed from Svc,Per NRC Request at 820819 Site Visit

ML20063L534
Person / Time
Site:	Beaver Valley
Issue date:	09/02/1982
From:	Carey J DUQUESNE LIGHT CO.
To:	Varga S Office of Nuclear Reactor Regulation
References
TAC-10386, NUDOCS 8209090144
Download: ML20063L534 (2)

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9 Telephone (412) 4564000 Nuclear Division P.O. Box 4 Sh6ppingport, PA 150774004 September 2, 1982 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attn: Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing Washington, DC 20555

Reference:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 N-1 Loop Instrumentation Centlemen:

During a site visit on August 19, 1982, Mr. Richard Eckenrode of your staff requested K. D. Grada of Duquesne Light Company to identify control room instrumentation and annunciators that would be affected during operation with a reactor coolant loop removed f rom service.

The following is a summary of the items identified at that time:

Ins trurrenta tion Reactor Coolant Flow (3 indicators)

RCS Loop AT (2 indicators)

Wide Range Cold Leg Temperature ( 1 pen on 3 pen recorder) l Wide Range Hot Leg Temperature (1 pen on 3 pen recorder) l Wide Range Steam Generator Level (1 pen on 3 pen recorder)

Narrow Range Steam Generator Level (3 indicators)

Steam Generator Pressure (5 indicators) l Feedwater Flow (2 indicators) l RCS Loop Tavg (2 indicators) l Steam Flow (2 indicators)

Overtemperature AT (1 indicator) l Overpower a T (1 indicator)

Reactor Coolant Pump Ammeter (1 indicator)

Reactor Coolant Pump Cooling, Seal Instruments (8 indicators, 1 pen on each of (2) 3 pen recorders)

Steam Flow, Feedflow, Level Recorder (3 pen recorder) l

! These instruments would read downscale in the isolated loop with the exception of steam generator and reactor coolant pump instrumentation, which would depend on the nature of the work in the loop.

8209090144 820902 PDR ADOCK 05000334 P PDR

Beaver Valley Power Station, Unit No. 1 Wh

• Docket No. 50-334, License No. DPR-66 N-1 Loop Instrumentation Page 2 Annunciators Since many of the annunciators share common inputs from all three loops, the inputs from the out of service loop would have to be de-feated to maintain the operability of the alarm function.

For cases where a separate annunciator is provided for status mon-itoring on each loop or loop component, the annunciator itself would be identified as being out of service. This would make it identifiable to the operator and avoid confusion on plant status in the event of an accident.

. Approximately 27 annunciators with common inputs from all three loops and 12 additional annunciators with independent inputs would be affected. The number would vary on several factors, eg steam generator layup status, coolant pump status and the nature of the work being performed on the isolated loop. The method of defeating or identifying these annunciators would have to be part of the procedure prepared for the evolution.

In addition to these annunciators, approximately 36 bistable status lights could be af fected in the inoperative loop, this would depend on the type of work to be performed on the out of service loop. The capability to bypass protection system inputs from the inoperative loop would be nec-essary during performance of any surveillance test which tripped bistables to preclude a reactor trip or safeguards actuation due to completing a 2 out of 3 logic matrix.

Very truly yours, J. J. Carey Vice President, Nuclear cc: Mr. W. M. Troskoski, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 t