ML19253B017

LER 79-031/03L-0:on 790807,during Testing of Emergency Diesel Generator Sequencing Circuit,First Loading Sequence Was Shorter than Required.Caused by Starting Point Being Off Zero.Sequencer Cycled & Adjusted to within Spec Limits

ML19253B017
Person / Time
Site:	Beaver Valley
Issue date:	09/07/1979
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19253B014	List: ML19253B013 ML19253B017
References
LER-79-031-03L, LER-79-31-3L, NUDOCS 7909140374
Download: ML19253B017 (1)

Text

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74 75 REPORT OATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l During surveillance testing of the No. 1 Emergency Diesel Generator sequencing circuit,l IOTTl I the first loading sequence interval was 4.106 seconds rather than the required 4.500 l o 4 l seconds. The health and safety of the general public was not jeopardized since the

[OTT] [ diesel generator is capable of accepting full load in 3.5 seconds as demonstrated by l 0 6 l the manufacturer's 150 test. runs. Therefore, the diesel generator is capable of l 0 7 l accepting partial load at 4.1 seconds. l O s 1 I 7 s, so

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40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i O I The short first interval resulted because the starting noint of the secuencer was I i i i slightiv off zero. The sequencer was evaled and adiusted to within specifications. I i 2 I I i a l I 1 4 l l 7 8 9 80 STA 5  % POWER OTHER5TATUS dis O RY DISCOVERY DESCRIPTION ITTTl IG l@ l o f o f o I@l N/A l l B lhl Surveillance test l AC rivlTY CO TENT REu AsEo oP RELE AsE LOCATION OP RELEASE @

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NAME OF PREPARER

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PHONE:

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