ML19257C589

LER 79-038/03L-0:on 791130,during Normal Operation, Suppression Chamber Level Instrument PC-LI-12 Failed Downscale.Caused by Failure of Power Supply.Power Supply Replaced & Proper Indication Verified

ML19257C589
Person / Time
Site:	Cooper
Issue date:	12/28/1979
From:	Phillips D NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257C585	List: ML19257C584 ML19257C589
References
LER-79-038-03L, LER-79-38-3L, NUDOCS 8001290450
Download: ML19257C589 (1)

Text

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NRC . FORM 366 U. S. NUCLEAR REGULATORY COMMISSION 17 77)

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N EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h o 2 lDuring normal operation, suppression chamber level instrument PC-LI-12 failed down- J o 3 [ scale. T.S. Table 3.2.F requires all level instruments operable. All other level I o a lindicators were indicating properiv. There were no sinnificant occurrences as a I o s [ result of this event and there were no adverse affects to public health and safetv. I 3 6 frhis event is not recetitive. I o l I als ! I ri )

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JJ sh J 4J 42 4j 44 47 CAUSE DESC AiPTION AND CORRECTiv E ACTIONS 1 o frhe level indicator failed due to a failure of the oower sucolv The cower semel v isl i i la model CPS-15 24/28 manufactured bv Standard powe- Tr c n r,n r, r e a . m w .7- c,,7 1 7 1 yas replaced and proper indication was verified. The failure of the power supp1v wasl i i lapparently due to an internal short, which caused the cover sucolv tr msfomer to l I

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