ML19345G724
| ML19345G724 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/16/1981 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Kent S NRC OFFICE OF CONGRESSIONAL AFFAIRS (OCA) |
| Shared Package | |
| ML19345G725 | List: |
| References | |
| NUDOCS 8104220175 | |
| Download: ML19345G724 (5) | |
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APR 161981
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%, e Docket No. 50-334
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gs Thoma s,Fehns Assistet'for O e Executive Diyecpr' for Operations perations. Office o MEMORANDUM FOR:
FROM:
Thomas M. Novak, Assistant Director for Operating Reactors, Division of Licensing, ONRR
SUBJECT:
BACKGROUND INFORMATION ON BEAVER VALLEY Enclosed is a brief outline of the operating history of Beaver Valley Power Station, Unit No.1, as requested by your memorandum dated April 10, 1981.
Original signed b7:
Tho=as M. I!3vak Thomas M. Novak, Assistant Director for Operating Reactors Division of Licensing
Enclosure:
As stated DISTRIBUTION Docket File k E. Case NRC PDR H. Denton Local PDR S. Hanauer PPAS R. Mattson ORB 1 Reading T. Murley D. Eisenhut B. Snyder R. Purple R. Yollmer J. Heltemes, AEOD P. Fine OELD H. Thompson M. Bridgers, EDO
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BEAVER VALLEY POWER STATION, UNIT NO. 1 OPERATING HISTORY Beaver Valley Power Station, Unit No.1 was issued a full power operat-ing license on July 2,1976 and began commercial operatiert on October 1, 1976.
A profile of the operating history of the unit is displayed as a plot of unit availability factor versus time in Attachment (1). The unit avail-ability factor is a measure of the fraction of the time per month that the unit is available for power generation with 100 indicating 100'.
availabili ty. The relatively low cumulative valve of 34.9 for Beaver Valley has resulted primarily from the need for extensive stress reana-lysis and modification of safety related piping and systems because of seismic stress considerations. The modifications are essentially com-plete and improved availability is expected. The NRC staff considers the management capabilities of Duquesne Light Company, the licensee for Beaver Valley, to have been a contributor to the frequency and duration of outages of the facility. A major reorganization is currently underway as a result of staff activities and it is expected that the newly formed Nuclear Division will result in improved safety, efficiency and availability when fully implemented.
Attachment (2) summarized the periods of extended outage during operation.
Only those outages relating to items of a reactor safety nature or those causing extended facility outages are included. Any that would normally be considered a routine part of operation, such as planned calibration or testing and minor repairs, are not included. Those that are considered to have a safety significance are indicated by (s).
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c ATTACHMENT 2 Shutdown for repairs to failed auxiliary feedwater November 5, 1976 to December 16, 1978 lines. (s)
Shutdown for modifications to feed regulating valves January 6,1977 to March 7,1977 to eliminate feedwater system vibrations. (s)
Shutdown for modification of main steam trip valves August 26, 1977 to October 25, 1977 and other maintenance. (s)
Shutdown to inspect low head safety injection pumps and April 29, 1978 to June 26, 1978 outside recirculation pumps. (s)
July 28,1978 Shutdown for replacem'ent of failed main transformer.
to December 18, 1978 Shutdown for seismic piping stress reanalysis. (s)
March 9, 1979 to August 8, 1979 Shutdown for refueling and major system modifications December 1,1979 to November 21, 1980 resulting from seismic reanalysis and TMI Lessons Learned. (s)
Shutdown for repairs to various reactor coolant system February 19, 1981 to April 16, 1981 components. (s) l t
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