05000316/LER-1985-025-01, :on 850906,discovered That Reactor Trip Instrumentation Surveillance Requirements 4.3.1.1.1,Items 18B & 20 Inadequate.Cause Not Determined.Items Added to Computerized Nuclear Test Schedule for Reactor Startup

:on 850906,discovered That Reactor Trip Instrumentation Surveillance Requirements 4.3.1.1.1,Items 18B & 20 Inadequate.Cause Not Determined.Items Added to Computerized Nuclear Test Schedule for Reactor Startup

ML20133H323
Person / Time
Site:	Cook
Issue date:	10/07/1985
From:	Blind A INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20133H317	List: 05000316/LER-1985-024-01, :on 850906,automatic ESF Actuation Occurred, Resulting in Reactor Trip Signal.Caused by Simultaneous Tripping of Two of Three Steam Generator 2 Level Channel Bistables.No Corrective Action Taken 05000316/LER-1985-025-01, :on 850906,discovered That Reactor Trip Instrumentation Surveillance Requirements 4.3.1.1.1,Items 18B & 20 Inadequate.Cause Not Determined.Items Added to Computerized Nuclear Test Schedule for Reactor Startup ML20133H316
References
LER-85-025-01, LER-85-25-1, NUDOCS 8510170045
Download: ML20133H323 (2)

LER-1985-025, on 850906,discovered That Reactor Trip Instrumentation Surveillance Requirements 4.3.1.1.1,Items 18B & 20 Inadequate.Cause Not Determined.Items Added to Computerized Nuclear Test Schedule for Reactor Startup

Event date:
Report date:
3161985025R01 - NRC Website

text

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3.3.1.1 (RF1CIUR TRIP INSTRUMDEATION) TIAT SUINEIIJRG REQUIREMENTS 4.3.1.1 ITIN I

18B AND ITD' 20 WERE PREVIOUSLY PM IULLY CCMPLIED WIT!!.

SURVEIIJRJCE ITEM 18D ('IUPDINE S'IOP VALVE CIDSURE) NAS PERIDINID CN A POtEIILY BASIS (EVR DCTI11 UNITS 1 AND 2). IT WAS DETERMINED TilAT Ti!IS SURVEIIJRG MUST AISO DE VERIFIED WIT!IN 7 DAYS OF A REACIOR STAR'IUP. TIIIS ADDITICNAL SU)NEILING REQUIRINDE NAS ?M PREVIOUSLY IDDEIFIED. SUPVEITLANCE ITD120 (RF/CIOP COOIRE PUMP BREAKERS POSITION TRIP) FOR UNIT 2 CRiNCE DE DOCUMD4TED AS PEING PERFOINED BETWEEN 'I1E PERIOD OF JULY 7,1979, AND APRIL 4,1981.

'IO PREVDE RECURRDE, Ti!E SURVEIIJRG REUJIREMENTS 4.3.1.1.) 1101 18D NO I'In!

20 !! AVE BEDI ADDED 'IO TIE CCPPLffERIZED NUCLEAR TEST SCIIEDULE FOR REACIOR STAICUP IDR UNIT 1 AND UNIT 2.

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SURVEILIANCE ITEM 18B (TURBINE S70P VALVE CIfEURE) WAS PFEFDINED ON A KNri!LY BASIS (UNIT 1 AND UNIT 2). IT WAS DETERMINED MIAT MIIS SURVEIIJANCE MUST ALSO BE VERIFIED WIDIIN 7 DAYS OF A REACIOR STARIUP. TIIE NEED EUR VERIFYING 'IllE SURVEIIJREE WITIIIN 7 DAYS OF REACIOR STAR 1UP WAS Norr REALIZED DURING PREVICUS SURVETTJNCE SCIEDULING.

SURVEIIIANCE ITDI 20 (REACIOR COOIRTP ITMP BREAKER IOSITION TRIP) EVR tHIT 2 CANNOT BE DOCUMENTID AS BEING PEREORMED BF1IWEEN T!!E PERIOD OF JULY 7,1979, MD i@RIL 4,1981. SURVEILIREE FOR ITEM 20 IS PEREDIMD EVERY 18 MCNI1fS AND TIIE SURVEILIANCE PROCEDURE EVR UNIT 2 WAS ISSUED W JULi 24, 1979, WIMI TIIE FIRST DOCUME2TED TEST BEING PERFDINED ON APRIL 4,1981. TIIE CAUSE EVR NO DOCUMENITD PEREVRMRCE OF SURVEIIJANCE ITIN 20 FOR UNIT 2 IN 1979 AND 1930 CANNOT IE DETEININED.

'IO PREVENT RDCURRE2EE, TIIE SURVEIIJREE REQUIRIMNTS 4.3.1.1.1 ITEN 18B AND ITEN 20 IIAVE BEEN ADDED TO TIE COMPUTERIZED NUCIENt TEST SCHEDULE EVR RFACIOR STARIUP EDR UNIT 1 AND UNIT 2.

PREVIOUS OCCURRFNCES Of A SIMILAR NAnmE WERE REPORITD BY IER(S): 50-16/85-21; AND 50-316/81-41.

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