05000348/LER-1980-072-03, /03L-0:on 801031,river Water Train B Declared Inoperable When Pump 5 Tripped & Would Not Restart.Caused by Breaker Hea 86 Lockout Relay & 50G Instantaneous Overcurrent Relay Actuation

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/03L-0:on 801031,river Water Train B Declared Inoperable When Pump 5 Tripped & Would Not Restart.Caused by Breaker Hea 86 Lockout Relay & 50G Instantaneous Overcurrent Relay Actuation
ML19345B840
Person / Time
Site: Farley Southern Nuclear icon.png
Issue date: 11/26/1980
From: Hairston W
ALABAMA POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345B806 List:
References
LER-80-072-03L, LER-80-72-3L, NUDOCS 8012020601
Download: ML19345B840 (1)
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LER-1980-072, /03L-0:on 801031,river Water Train B Declared Inoperable When Pump 5 Tripped & Would Not Restart.Caused by Breaker Hea 86 Lockout Relay & 50G Instantaneous Overcurrent Relay Actuation
Event date:
Report date:
3481980072R03 - NRC Website
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S 63 66 doc 4ET wuu tR Gd G'J EVEPsT DATE 34 75 REPCRT DATE So EVENT OEStRAPTICM AND PRC3A81.E CCNSEQUENCES t o,jg l At 2040 on 10-31-80 River Water (RW) Train B was declared inoperable when RW

,3, 3 ; ; pu p No. 5 tripped and would no't' restart. River water Train A had beert removed.

oi.;gj from service at 1634 for cleaning of the A Train. lube and cooling strainer.

9o,si ; Tech. Spec. 3.7.5 requires two independent river water loops to be operable.

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s o is 1 l tech. Spec. 3.0.3 and 3.7.5 action sthtem'ent requirements were met.

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g l RU Train A was returned to service and verified operable at 2110 on 10-31-80.

is ii I I Investigation of the RW pump No. 5 (B Trairt) breaker trip revealed tbat the r, i 2 i l breaker's m 86 lockout relay and 5.0G instantaneous overcurrent relay were gl actuated. No apparent cause could be determined for th'e relay actuations.

l Relays were reset and the pump returned to service at 2322 on 10-31-80.

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