ML20149J242
| ML20149J242 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 12/29/1987 |
| From: | Long W Office of Nuclear Reactor Regulation |
| To: | Trevors G NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| TAC-65936, NUDOCS 8802220325 | |
| Download: ML20149J242 (3) | |
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E W ASHING T O N. D. C. 20555 December 29, 1987
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Docket No. 50-298 l
Mr. George A. Trevors, Division Manager - Nuclear Support Nebraska Public Power District Post Office Box 499 Columbus, Nebraska 68601
Dear Mr. Trevors:
SUBJECT:
UNPLANNEO AUTOMATIC STARTUPS OF OlESEL GENERATORS (TAC NO. 65936)
Re:
Cooper Nuclear Station Thank you for your letter dated October 14, 1987, which responds to our August 26, 1987 request for information.
Your letter states that an engineering effort is in progress, with the object of reducing the number of challenges to the diesel generators due to offsite power disturbances, and that we will be advised of the outcome.
Based on information contained in your operator training document, CNS's diesels start on:
1.
Reactor water low level 2.
High drywell pressure 3.
Under voltage on startup transformer secondary 4.
Under voltage on emergency transformer secondary S.
1F (1G) 4160 bus undervoltage 6.
lAN (IBN) breaker trip 7.
1FA (1GB) breaker trip 8.
lAF (IBG) breaker trip.
According to the LERs and your letter, CNS's frequent unplanned diesel startups are a result of the Item 4 function.
A review of the electrical system of a similar facility reveals no functions similar to Items 3 and 4
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Q George A. Trevors above..It is possible that Items 3 and 4 may be unnecessary functions.. We suagest you take this into consideration in your study.
If you have any questions, please contact me at 301-492-4754.
Sincerely, s s\\
i William O. Long. Project Manager Project Directorate - IV Division of Reactor Projects - III.
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4 Mr. George A. Trevers Nebraska Public Pcwer District Cooper Nuclear Station cc:
Mr. G. D. Watson, General Counsel Nebraska Public Power District P. O. Box 499 Columbus, Nebraska 68601 Cooper Nuclear Station ATTN: Mr. Guy R. Horn, Divisien Manager of Nuclear Operations P. O. Box 98 Brownville, Nebraska 68321 Director Nebraska Departnent cf Environrental Control P. O. Box 94877 State House Station Lincoln, Nebraska 68509-4877 Mr. Willian Siebert, Commissioner Neraha County Board of Comnissioners Henaba Courty Courthouse Auburn, Nebraska 68305 Senior Resident Inspector U.S. Nuclear Regulatory Comnissica P. O. Box 218 Brownville, Nebraska 6B321 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Mr. Harold Borchart, Director Division of Radiological Health Department of Health j
301 Centennial Mall, South P. O. Box 95007 Lincoln, Nebraska 68509
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