05000334/LER-1980-111-03, /03L-0:on 801211,steam Generator Feed Pump Suction Pressure Low Alarm Was Received.Caused by Control Rod Insertion.Rods Partially Borated Back Out of Core,Restoring Delta Flux to within Target Band

/03L-0:on 801211,steam Generator Feed Pump Suction Pressure Low Alarm Was Received.Caused by Control Rod Insertion.Rods Partially Borated Back Out of Core,Restoring Delta Flux to within Target Band

ML19340F123
Person / Time
Site:	Beaver Valley
Issue date:	01/09/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340F122	List: 05000334/LER-1980-111, Forwards LER 80-111/03L-0 05000334/LER-1980-111-03, /03L-0:on 801211,steam Generator Feed Pump Suction Pressure Low Alarm Was Received.Caused by Control Rod Insertion.Rods Partially Borated Back Out of Core,Restoring Delta Flux to within Target Band
References
LER-80-111-03L, LER-80-111-3L, NUDOCS 8101190470
Download: ML19340F123 (2)

LER-1980-111, /03L-0:on 801211,steam Generator Feed Pump Suction Pressure Low Alarm Was Received.Caused by Control Rod Insertion.Rods Partially Borated Back Out of Core,Restoring Delta Flux to within Target Band

Event date:
Report date:
3341980111R03 - NRC Website

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%d 69 EvtNTCATE le 75 REPCRT C ATE d3 EVENT DESCRIPTION AND PROBA8LE CONSECUENCES the Steam Generator Feed Pump Suction Pressure 1.cw alarm was received 4 Ioj:JlAt 1123 hours0.013 days <br />0.312 hours <br />0.00186 weeks <br />4.273015e-4 months <br />.

10i3I1A power reduction from 44 nercent was becun at a r. ate of 1 nercent act minute.

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1 o 141 1 1115 b.m rs. au pressure returned to nor-a1. the never decre mo was stonned n 40 l

lois! l percent. Durine this transient, delta flux left the low side of the tarcet band forl 10 is ) Itwo minutes.

Power onoration continted in accord,nce with Techni 11 Sneri fic it ion l

[TTTll3.2.1. The health and safety of the public was not iconardized since delta flux l

I [aisi i staved well within its safety limits.

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S 3a 31 40 41 42 4J 44 47 CAUSE CESCRIPTION AND CORRECTIVE ACTtCNS lt l o j J Control rod insertion caused the delta flux to leave the tareet hand durin? the I

li li) lpower decrease. To restore the delta flux within the band, the rods wero a,rt i,! ! - I a further refinement to the I l borated back out of the core.

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, 33, ltartet flux value was made on 12/30/80. The delt.a flux measured durine this l

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Attachment To LER 80-111/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.

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