05000325/LER-1979-030-03, /03L-0 on 790508:while Returning Main Steam Line Flow Switch Back to Svc,Switch Indication Pegged High, Indicating Nonexistant Excessive Steam Flow.Caused by Plugged Line.Line Reopened & Instrument Returned to Svc

/03L-0 on 790508:while Returning Main Steam Line Flow Switch Back to Svc,Switch Indication Pegged High, Indicating Nonexistant Excessive Steam Flow.Caused by Plugged Line.Line Reopened & Instrument Returned to Svc

ML19289F607
Person / Time
Site:	Brunswick
Issue date:	06/08/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19289F603	List: 05000325/LER-1979-030, Forwards LER 79-030/03L-0 05000325/LER-1979-030-03, /03L-0 on 790508:while Returning Main Steam Line Flow Switch Back to Svc,Switch Indication Pegged High, Indicating Nonexistant Excessive Steam Flow.Caused by Plugged Line.Line Reopened & Instrument Returned to Svc
References
LER-79-030-03L-01, LER-79-30-3L-1, NUDOCS 7906150174
Download: ML19289F607 (2)

LER-1979-030, /03L-0 on 790508:while Returning Main Steam Line Flow Switch Back to Svc,Switch Indication Pegged High, Indicating Nonexistant Excessive Steam Flow.Caused by Plugged Line.Line Reopened & Instrument Returned to Svc

Event date:
Report date:
3251979030R03 - NRC Website

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HEPOH T DATE 80 EVENT DESCRt.' TION AND PROB ABI E COT.rOUENCES h o

2 lWhile returning the main steam line flow switch, 1B21-DPlS-N00BA, back to service I ollowing a routine calibration, its indication pegged high, indicating excessive steam l f

. o ;3 q4 l flow that did not exist.

It was determined that either the low pressure side isolation l 1o 5

valve was not opening or that the low pressure side line was plugged.

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linput, it was determined,that the line was plugged.

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LER CONTINUATION -- Ro# l-79-30 Facility: BSEP Unit #1 Event Date 5/8/79 successful and the instrument was returned to operating service.

This is considered an isolated event and no further action is required.

2229 105