L-78-199, Forwards Response to Two Staff Positions on Diesel Generator Lockout Enclosed in 5/8/1978 Letter

Forwards Response to Two Staff Positions on Diesel Generator Lockout Enclosed in 5/8/1978 Letter

ML18114A168
Person / Time
Site:	Saint Lucie
Issue date:	06/07/1978
From:	Robert E. Uhrig Florida Power & Light Co
To:	Reid R Office of Nuclear Reactor Regulation
References
L-78-199
Download: ML18114A168 (6)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

. DISTRIBUTION FOR INCOMING MATERIAL 50-335 REC: REID R W ORG: URHIG R E DOCDATE: 06/07/78 NRC FL PWR 5 LIGHT DATE RCVD: 06/i3/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR 3 'NCL 3 RESPONSE TO NRC LTR DTD 05/08/78... FORWARDING RESPONSES TO TWO STAFF POSITD3NS ON'~ESEt:GENERATOR LOCKOUT.

PLANT NAME: ST LUCIE Oi REVIEWER INITIAL: 'XJM DISTRIBUTOR b

INITIAL: ~

DISTRIBUTION OF THIS MATERIAL IS 'AS FOLLOWS'4+4+<<44<<+4+<<<4 DIESEL ALARI'I CIRCUITRY FOR DIESEL GENERATORS".

(DISTRIBUTION CODE A005>

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FLORIDA POWER 5 LIGHT COMPANY June 7, 1978 L-78-199 Office of Nuclear Reactor Regulation 'rPp ~

Attention: Mr. R. W. Reid, Chief c9 CZgy~~

Operating Reactors Branch k'4 Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Reid:

I Re: St. Lucie Unit 1 Docket No. 50-335 Diesel Generator Information We have reviewed the two staff posi tions on diesel generator lockout enclosed in your letter dated May 8, 1978. Our responses to the positions are attached.

Very ly yours, Robert E. Uhrig Vice President REU/MAS/cpc Attachment cc: Mr. James P. O'Rei lly, Region II Harold F. Reis, Esquire 781640037 PEOPLE... SERVING PEOPLE

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ATTACHMENT Re:= St. Lucie Unit 1 Docket No. 50-335 Diesel Generator Information

1. Staff Position All shared annunciators for disability conditions should not be able to be cleared until all abnormal conditions are corrected.

~Res onse St. Lucie Unit 1 conforms to the staff position.

No annunciator for a disabling condition clears before the condition is corrected.

2. Staff Position If a diesel generator's provided with a manual shutdown lockout relay, an alarm should be provided which is worded to clearly indicate the diesel generator is incapable of an automatic start when the relay is not set.

~Res onse St. Lucie Unit 1 conforms to the staff position.

The lockout relay will inhibit a start attempt unless the condition leading to the lockout is corrected and the lockout relay is reset. The lockout is

. annunciated and the annunciator will not clear unless the lockout relay is reset. It is standard practice at St. Lucie Unit 1 that lockout indication requires resetting the lockout reIay before the system is considered to be in a normal operating condition. Therefore, the annunciation associated with diesel generator lockout does indicate to the operators that attempts to start the diesel generator will be inhibited until the lockout relay is reset.

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