ML20098G663

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Forwards Amended Version of Attachment 1 to 840928 Response to Generic Ltr 84-15, Proposed Staff Action to Improve & Maintain Diesel Generator Reliability
ML20098G663
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 10/02/1984
From: Denton R
BALTIMORE GAS & ELECTRIC CO.
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
GL-84-15, NUDOCS 8410050300
Download: ML20098G663 (2)


Text

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BALTIMORE G AS AND ELECTRIC COMPANY P.O. B O X 14 7 5 B A LTIM O R E. M A R YL A N D 21203 NUCLEAR POWER DEPARTMENT CALVERT CLIFFS NUCLEAR POWER PL ANT LUSBY, M ARYLAND 20657 October 2,1984 U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, DC 20555 ATTENT'.ON: Mr. Darrell G. Eis2nhut, Director Division of Licensing

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Generic Letter 84-15, " Proposed Staff Actions to improve and Maintain Diesel Generator Reliaoiiity" Gentlemen:

Attached please find an amended version of Attachment I to Enclosure 1. Our response dated September 28, 1984, omitted the numerical des'gnations for our three diesel generators from the table heading. We apologize for any inconvenience this may have caused.

Very truly yours, c >4 i

R. E. Denton General Supervisor -

Training & Technical Services RED /gla g0050300841002 p ADOCK 05000327 #/

PDR

ATTACHMENT 1 TO ENCLOSURE 1 TABLE 2-1

  1. 11 DG #12 DG #21 DG
  1. OF PERCENT # OF PERCENT # OF . PERCENT FAILURES RELIABILITY FAILURES RELIABILITY FAILURES RELIABILITY Last 20 Valid Demands
  • 0 100 1 95' 0 100 Last 100 Valid Demands 3 97 3 97 0 100 NO.11 DIESEL GENERATOR Last 100 Valid Demands - August 9,1983 - June 1,1984 FAILURE TIME HISTORY August 17,1983 Diesel Generator failed to reach rated speed and voltage within 10 seconds on start January 12,1984 Diesel Generator failed to reach rated speed and voltage within 10 seconds upon start January 12,1984 Diesel Generator failed to reach rated speed and voltage within 10 seconds upon start Last 20 Valid Demands - March 5,1934 - June 1,1984 No Failures NO.12 DIESEL GENERATOR Last 100 Valid Demands - September 9,1983 - June 1,1984 FAILURE TIME HISTORY September 27,1983 Failure to reach rated speed and voltage within 10 seconds upon start N:vember 14,1933 Failure to reach rated speed and voltage within IC seconds upon s+ art April 4,1934 Failure to reach rated speed and voltage within 10 seconds upon start Last 20 Vdid Demands - March 11,1984 - June 1,1984 April 4,1984 Failure mentioned above No. 21 DIESEL GENERATOR Last 100 Valid Demands - June 22,1933 - June 1,1984 No Failures Last 20 Valid Demands - February 15,1984 - June 1,1984 No Failures NOTE: All start attempts mentioned above were failures because the diesel generator did not attain rated speed and/or voltage within 10 seconds. It should be noted that the diesel generators did start and did reach rated voltage and speed only a few seconds after the

. required time.

o Valid Demand is defined in Regulatory Guide 1.108 position C.2.e.

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