05000260/LER-1981-033-03, /03L-0:on 810702,reactor Low Pressure Permissive Switch for Recirculation Pump Discharge Valve Actuation Switch 1 Failed.Cause Unknown.Switch Freed & Exercised to Verify Operability.Considered Random Failure

/03L-0:on 810702,reactor Low Pressure Permissive Switch for Recirculation Pump Discharge Valve Actuation Switch 1 Failed.Cause Unknown.Switch Freed & Exercised to Verify Operability.Considered Random Failure

ML20009F969
Person / Time
Site:	Browns Ferry
Issue date:	07/23/1981
From:	Holder G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F964	List: 05000260/LER-1981-033, Forwards LER 81-033/03L-0 05000260/LER-1981-033-03, /03L-0:on 810702,reactor Low Pressure Permissive Switch for Recirculation Pump Discharge Valve Actuation Switch 1 Failed.Cause Unknown.Switch Freed & Exercised to Verify Operability.Considered Random Failure
References
LER-81-033-03L-01, LER-81-33-3L-1, NUDOCS 8108030203
Download: ML20009F969 (2)

LER-1981-033, /03L-0:on 810702,reactor Low Pressure Permissive Switch for Recirculation Pump Discharge Valve Actuation Switch 1 Failed.Cause Unknown.Switch Freed & Exercised to Verify Operability.Considered Random Failure

Event date:
Report date:
2601981033R03 - NRC Website

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h a 12 l,1 During normal operation, while performing routine surveillance tests (SI 4.2.B-7),

l 2-PS-68-96 switch number 1 failed to operate.

(T.S. Table 3.2.B).

This switch is n,,3, l

l a reactor low pressure permissive for recirculation pump' discharge valve actuation.

l oiAi Redundant systems were g

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

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Previous similar event: BFRO-50-260/78018.

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CAUGE DESCRIPTION AND CORRECTIVE ACTIONSThe Barton, bellows type, pressure switch, model 288 g I i l o j l Stuck switch - reason unknown.

iiiij i was freed, exercised a number of times to verify switch operability, and surveillance instruction 4.2.B-7 was satisfactorily completed. This is considered a random

, i,i i 1',Igl failure and no further recurrence control is required.

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Gene Holder (205) 729-6134 PHONE:

NAME OF PREPARER

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it y BF 15.2 Brosvin. Iterry N o r te:o l' hut G/04/81 1 F.l; SUl'l LF. MENT Al. INi/ul01 ATION Twhnic.at S;wnfication in ce!ved Tabl t 3,%.B._.._ _.

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• Late due NRC:.8/1Z81. _..

liete ried Under Technic.il Specific.iti<>n (>.7. 2.b_(2).

Time of occurrence __030_g_.,__ Unit 7_

Date of Occurrence 7/2/81

!dentification and De.,cription of Occurrence:

During routine surveillance tests (SI 4.2.B-7), reactor low pressure permissive switch for recirculation pump discharge valve actuation (2-PS-68-96 switch number 1) failed to operate.

Ceiniition:. l'rior to Oc. urrence Uniti' 1 In rdfueling outage.

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Unic 2 at 98%.

Unit 3 at 99%.

Action >pecified in tne Tc;hnical Specification Surveillance Requirements met Describe.

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l None APl'.uwt C. use of occt.crence.

Switch was stuck - reason unknown.

Asudvsis <>f Occurrence.

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

(:orr. clive Action: The Barton Model 288 was freed, exercised a number of times d

to verify switch operability, and SI 4.2.B-7 was satisfactorily complete.

This is considered a random failure and no further recurrence control is required.

Failure Data:

BFRO-50-260/78018 l'er~ d - 1.ifetime; ltesponsibility - Document Control Supervisor lier < ntion:

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+1h vision :