05000259/LER-1980-025-03, /03L-0:on 800313,primary Containment Isolation Testing Revealed Failure of RHR Injection Valve 74-67 to Close Upon Isolation Signal.Caused by Limit Switch on FCV- 74-48 Not Making Good Contact.Contact Cleaned & Adjusted

/03L-0:on 800313,primary Containment Isolation Testing Revealed Failure of RHR Injection Valve 74-67 to Close Upon Isolation Signal.Caused by Limit Switch on FCV- 74-48 Not Making Good Contact.Contact Cleaned & Adjusted

ML19305D801
Person / Time
Site:	Browns Ferry
Issue date:	04/11/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19305D787	List: 05000259/LER-1980-025, Forwards LER 80-025/03L-0 05000259/LER-1980-025-03, /03L-0:on 800313,primary Containment Isolation Testing Revealed Failure of RHR Injection Valve 74-67 to Close Upon Isolation Signal.Caused by Limit Switch on FCV- 74-48 Not Making Good Contact.Contact Cleaned & Adjusted
References
LER-80-025-03L, LER-80-25-3L, NUDOCS 8004150535
Download: ML19305D801 (2)

LER-1980-025, /03L-0:on 800313,primary Containment Isolation Testing Revealed Failure of RHR Injection Valve 74-67 to Close Upon Isolation Signal.Caused by Limit Switch on FCV- 74-48 Not Making Good Contact.Contact Cleaned & Adjusted

Event date:
Report date:
2591980025R03 - NRC Website

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'NRC FORM 366 U. S. NUCLEAR aEIULATOaY cOMMIS$10N am LICENSEE EVENT REPORT cONTRotstOcie1 l

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60 El DOCKET NUMBER tuR 69 EVENT oATE 74 7b REPORT DATE No EVE NT OFSCHIPTION ANo PROB ABLE CONSEQUENCES h y o l, y [During refueling outage, while performing primary containment isolation testing, RHR injection valve 74-67 f ailed to close upon isolation signal. Isolation capability g

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Valves FCV-74-66 and FCV-74-68 were g

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operable. There was no danger to health or safety of the public. No previous y

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31 40 el 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I i I o I lCause of the event was a limit switch on FCV-74-48 in the isolation logic not making l

i i i good contact. Contact was cleaned and adjusted and logic verified correct. Valve f

g, j, j ] limit switch setting procedure is being reviewed to determine if revisions are j

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NAME OF PREPARER PHONE:

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Brr+ nr, Ferry Nuclear Plant BF '~

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LER SUPPLr. MENTAL INFORMAT!ON BFhu 50, 259 / 8025

, Technral Specification Involved 3.7.D.1

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Date cf 0.currence _3/13/80,_ Tarae cf Occurrence _0330 Unit 1

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:lication sn.1 Desermtion cf Occurrance:

RHR injection valve 74-67 failed to close upon isolation signal.

Ct.mit' tons Pi! r in Oecurre:.. e.

Unit 1 @ 0% refueling outage.

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Unit 2 @ 85%

g Dk Unit 3 @ 100%

Act; a spec fie#1.1 the Techni al Spectfit rition Surveillance Requirement;

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dtg,,J,g,,innpt ral>l<' : j u,i[g;t etty_,, De se rat e._

Removed loop 2 RHR f rom S/D cooling mode and closed 1-FCV-74-67.

Aptnere nt Cr.use of Occi.rrence Cause of event was a limit switch on 1-FcV-74-48, which is in isolation logic circuit, not making good contact.

A n t'v.u s, : O curr m.*

There was no damage to plant equipment. There was no activit.y release, no personnel exposure or injury and no danger to, health or safety of the public.

Cot t.e tive Acti,n ;

The limit switch contact was cleaned and adjusted and logic circuit verified operable. Valve limit switch setting procedure is being ret.iewed to determine if revisions are necessary.

E*.YK"._ UM3-NA

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