05000260/LER-1980-007-03, /03L-0:on 800203,during Normal Operation,Reactor Recirculation Pump 2B Tripped.Caused by Pickup of Recirculation Motor Generator Set Generator Stator Temp Relay.Tests Run,No Problems Found

/03L-0:on 800203,during Normal Operation,Reactor Recirculation Pump 2B Tripped.Caused by Pickup of Recirculation Motor Generator Set Generator Stator Temp Relay.Tests Run,No Problems Found

ML18024B389
Person / Time
Site:	Browns Ferry
Issue date:	03/03/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024B388	List: 05000260/LER-1980-007, Forwards LER 80-007/03L-0 05000260/LER-1980-007-03, /03L-0:on 800203,during Normal Operation,Reactor Recirculation Pump 2B Tripped.Caused by Pickup of Recirculation Motor Generator Set Generator Stator Temp Relay.Tests Run,No Problems Found
References
LER-80-007-03L-01, LER-80-7-3L-1, NUDOCS 8003070358
Download: ML18024B389 (4)

LER-1980-007, /03L-0:on 800203,during Normal Operation,Reactor Recirculation Pump 2B Tripped.Caused by Pickup of Recirculation Motor Generator Set Generator Stator Temp Relay.Tests Run,No Problems Found

Event date:
Report date:
2601980007R03 - NRC Website

text

NRC FORM 366 I7.77) uceNSEE EVE "-.sEPUHY U S NUCLEAR REGLILATORYCOMMISSION

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0 Q SOURCE 60 61 ppCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES +10 During normal operation 2B Reactor Xecirculation pump tripped.

Load was reduced to 617HWe.

Reference T.S. 3.6.E.l.

There was no danger to health

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There are no redundant systems.

No previous occurrences.

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SUPPLIER hIANUFACTURER

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33 34 35 36 31 40 41 42 43 44 41 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 2B recirc.

pump tripped when recirc, MG set generator stator temp. relay picked up.

Electrical tests were run on the relay and RTD.

Windings were bridged, meggered and hi-potted and inspected for moisture 'and damage.

No problems were found.

Spurious signal suspected.

No recurrence control required.

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9 FACILITY I.IETHOD OF STATUS "4 POWER OTHER STATUS Q DISCOVERY s

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11 12 13 PERSONNEL INJURIES DISCOVERY DESCRIPTION Q32 observed pump trip LOCATIONOF RELEASE QB 80 80 80 80 7

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Tennessee Valley Authority Browns Ferry Nuclear Plant Form BF-lV BF 15.2 1/10/78 LER SUPPLEMENTAL INFORMATION BFRO 260 / 80007 Technical Specification Involved Ileported Under Technical Specification Date of Occur rence 2/3/80 Time of Occurrence Unit

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Identification and Descri tion'of Occurrence:

Reactor recirculation pump 2B tripped.

Load was reduced to 617 HRe.

Conditions Prior to Occurrence:

Unit 1 9 0% refueling outage Unit 2 9 98%

Unit 3 9 97%

Action specified in the Technical Specification Surveillance Requirements met due to ino erable e ui ment.

Describe.

EOI was initiated

~A arent

Cause

of Occurrence:

Recirculation pump 2B tripped when recirculation 8G set generator stator temp.

relay picked up.

Anal sis of Occurrence:

There was no damage to plant equipment.

There was no activity release, no personnel exposure or injury and no danger to health or safety of the public.

Corrective Action

Ejlectrical tests were run on the relay and RTD.

The windings were bridged,

meggered, hi-potted and inspected for moisture and damage.

No problems were found and cause of relay actuation unknown.

A spurious signal suspected.

Failure Data:

NA

~Retention:

eriod - Lifetime; Responsibility

- Administrative Supervisor

• Revision:

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