05000368/LER-1979-010-03, /03L-0 on 790124:pump Discharge valve,2CV-5667-2, Stroked Fully Open But Immediately Reclosed.Caused by sodium-hydroxide Tank Low Level Alarm & Indication Circuit Being Out of Alignment

/03L-0 on 790124:pump Discharge valve,2CV-5667-2, Stroked Fully Open But Immediately Reclosed.Caused by sodium-hydroxide Tank Low Level Alarm & Indication Circuit Being Out of Alignment

ML19261B619
Person / Time
Site:	Arkansas Nuclear
Issue date:	02/22/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19261B616	List: 05000368/LER-1979-010-03, /03L-0 on 790124:pump Discharge valve,2CV-5667-2, Stroked Fully Open But Immediately Reclosed.Caused by sodium-hydroxide Tank Low Level Alarm & Indication Circuit Being Out of Alignment 05000368/LER-1979-017-03, /03L-0 on 790201:boric Acid Makeup Tank Level Below Tech Spec Min.Caused by Equalization of Boric Acid in Both Tanks ML19261B615
References
LER-79-010-03L, LER-79-10-3L, NUDOCS 7902280289
Download: ML19261B619 (1)

LER-1979-010, /03L-0 on 790124:pump Discharge valve,2CV-5667-2, Stroked Fully Open But Immediately Reclosed.Caused by sodium-hydroxide Tank Low Level Alarm & Indication Circuit Being Out of Alignment

Event date:
Report date:
3681979010R03 - NRC Website

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RC FORM 366 U. S. NUCLE AR RE GUL ATORY COMMisslON 17 77)

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60 61 DOCLET NUMBER od 69 EVENT DATE 74 75 HEPOH1 JATE 80 EVENT DESCRIPTION AND PROS ADLE CONSEQUENCES h o

2 lDuring Power Escalation Testing, Mode 1 operation, while performing the o13 1reu*4ne curveillance test of the "B" train Sodium Hydroxide Addition l

l System, the pump discharge valve, 2CV-5667-2, stroked fully open, but o

4 in Isl I un a i,+ nl y -re-1 m nd. The redundant train was available. There have l

l o 161 1 been no similar occurrences. Reportable per T.S.6.9.1.9 (b).

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O lInvestication revealed that the valve reclosed due to the Sodium Hydrox-l liIijlide Tank Low level alarm and indication circuit out of alignment.

It l i 171 I me e lim od. operationally tested, and returned to service within l

3 l six hours.

The recuirements of Action Statement T.S.3.6.2.2 were met.

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N AVE CF PAEPAHER Chris N. Shively 501/968-2519 7902280GLgg