05000316/LER-1978-076-03, /03X-1 on 780929:during Normal Operation, Surveillance Test on Train B of Solid State Protection Sys Showed Several Switch Positions Were Bad.Cause Was Bad Universal Logic Card (Westinghouse Part 6056D21G01)

/03X-1 on 780929:during Normal Operation, Surveillance Test on Train B of Solid State Protection Sys Showed Several Switch Positions Were Bad.Cause Was Bad Universal Logic Card (Westinghouse Part 6056D21G01)

ML17331A139
Person / Time
Site:	Cook
Issue date:	01/19/1979
From:	Rischling J INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317A898	List: 05000316/LER-1978-022, Forwards LER 78-022/03X-1, 78-031/03X-1 & 78-076/03X-1 05000316/LER-1978-022-03, /03X-1 on 780407:during Normal Operation,Position Indication for Rods D-12 & H-8 Exceeded +/- 12 Step Limit of Tech Specs.Outputs of Amplifiers That Feed Control Board Indicators Found to Be Incorrect 05000316/LER-1978-031-03, /03X-1 on 780507:during Normal Operation Between 780507 & 780519 RPI Did Not Meet +/- 12 Step Limit of Tech Specs 22 Times.Caused by Recessed Pins in Connector 05000316/LER-1978-076-03, /03X-1 on 780929:during Normal Operation, Surveillance Test on Train B of Solid State Protection Sys Showed Several Switch Positions Were Bad.Cause Was Bad Universal Logic Card (Westinghouse Part 6056D21G01)
References
LER-78-076-03X, LER-78-76-3X, NUDOCS 7901260174
Download: ML17331A139 (2)

LER-1978-076, /03X-1 on 780929:during Normal Operation, Surveillance Test on Train B of Solid State Protection Sys Showed Several Switch Positions Were Bad.Cause Was Bad Universal Logic Card (Westinghouse Part 6056D21G01)

Event date:
Report date:
3161978076R03 - NRC Website

text

NRC FORM 366 U. S. NUCLEAR REGUI.ATORY COMIVIISSION e8 lhNPPRRKr KV(SEDATE01-78 IY'ONTROL BLOCK:

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LICENSEE CODE 14 16 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T 0

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES AIO DURING NORMAL OPE RATION SURVEILLANCE TEST ON TRAIN B OF THE SOL I D STATE

~O3 PROTECTION SYSTEM REVEALED THAT SEVERAL'SWITCH POSITIONS TESTED WERE BAD.

THIS RENDERED THE SYSTEM INOPERABLE IN RESPECT TO T.S.

TABLE 3.3-1 ITEM 22.

~OS THE APPLICABLE ACTION REQUIREMENTS 'WERE FULFILLED.

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9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.

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33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION ANDCORRECTIVE ACTIONS F27)

IMMEDIATE TROUBLESHOOTING REVEALS THAT THIS FAILURE WAS DUE TO BAD UNIVERSAL LOGIC CARD (

WESTINGHOUSE PART NO. 6056D21G01).

THE DEFECTIVE LOGIC CARD WAS REPLACED AND AFTER TESTING THE NEW CARD, THE SYSTEM WAS RETURNED TO 3

SERVICE.

NO FURTHER ACTIONS ARE REQUIRED AS A RESULT OF THIS EVENT.

4 80 DISCOVERY DESCRIPTION Q32 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ36 EKI '33 ZQ NA 7

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10 11 44 PERSONNEL EXPOSURES 7

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11 12 13 PERSONNEL INJURIES 7

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