05000260/LER-1981-041-03, /03L-0:on 810709,unit Crossconnect Capability Between Units 2 & 3 Reduced to One RHR Pump When RHR Pump 3C Became Inoperable.Caused by Pump Motor Failure on Ground Overcurrent During Testing

/03L-0:on 810709,unit Crossconnect Capability Between Units 2 & 3 Reduced to One RHR Pump When RHR Pump 3C Became Inoperable.Caused by Pump Motor Failure on Ground Overcurrent During Testing

ML20010A961
Person / Time
Site:	Browns Ferry
Issue date:	08/05/1981
From:	Holder G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010A956	List: 05000260/LER-1981-041, Forwards LER 81-041/03L-0 05000260/LER-1981-041-03, /03L-0:on 810709,unit Crossconnect Capability Between Units 2 & 3 Reduced to One RHR Pump When RHR Pump 3C Became Inoperable.Caused by Pump Motor Failure on Ground Overcurrent During Testing
References
LER-81-041-03L, LER-81-41-3L, NUDOCS 8108130168
Download: ML20010A961 (2)

LER-1981-041, /03L-0:on 810709,unit Crossconnect Capability Between Units 2 & 3 Reduced to One RHR Pump When RHR Pump 3C Became Inoperable.Caused by Pump Motor Failure on Ground Overcurrent During Testing

Event date:
Report date:
2601981041R03 - NRC Website

text

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NRC FORM 3.p U. S. NUCLEAR REGULATORY COMMISSION (7 77L LICENSEE EVENT REPORT CONTROL BLOCK: l l

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h IoI7l l Durinn routine power operation load changes, unit cross-connect capability between l

In l3 l l teits 2 and 3 was reduced to one RHR pump when 3C RHR pump became inoperable.

l lo Ici l See T.S. 3.5.B.12.

There was no danger to the health or safety of the public.

j l o 16 l l Redundant systems were available and operable. There were no previous similar l

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lcl 181 O J3 34 35 36 37 40 43 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i l U 1 l 3C RHR pump motor failed on ground overcurrent while running operability SI. (Ref-l [i IiI l erence LER BFRO-50-296/81034.) The GE model 5K6348XC 23A, 2000 HP, 3 phase motor l

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4 Tennessee Valley Authority Form BF 17 Browns Ferry Nuclear Plant BF 15.2 6/01/81-1.F.R SUPPLEMENTAL INFORMATION BFRO 260 / 81041 Technical Specification involved 3.5.B.12-

_ /8/81 8

licported Under Technical Specification 6.7.2.b(2)

• Date due NRC:

Date of Occurrence J/9/81_ _ Time of Occurrence 0150_ Unit,2 and 3 Identification and Description of Occurrence:

Unit cross-connect capability between units 2 and 3 was reduced to one RHR pump when 3C RHR pump became inoperable.

(Reference LER BFRO-50-296/81034.)

1 Conditions Prior to Occurrence:

Unit 1 in refueling outage.

Unit 2 at 60%

Unit 3 at 99%.

i Action specified in the Technical Specification Surveillance Requirements met e

@e to inope_rable equipment. Describe.

Required surveillance testing was. performed.

J W

Apparent Cause of Occurrence:

3C RHR pump motor failed on ground overcurrent while running operability SI.

4 Ana,vsis of Occurrence:

There was no danger to the health or safety of the public, no release of activity, no damage to the plant or equipment, and no resulting significant chain of events.

4

Corrective Action

3C RHR pump motor was replaced and successfully. tested. (Reference LER BFRO 296/81034 for recurrence control).

Fa:1ure Data:

1 None

, Retention _ :

Per' d - 1.ifetime;. Responsibility - Document Control Supervisor

• Revision :