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

/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

ML17317A901
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-78-031-03X, LER-78-31-3X, NUDOCS 7901260171
Download: ML17317A901 (4)

LER-1978-031, /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

Event date:
Report date:
3161978031R03 - NRC Website

text

NRO F49344 366 U. S. NUCLEAR REGULATORY COMMISSION I7.77)

LICENSEE EVENT REPORT UPDATE~PORT PREVIOUS REPORT DATE 6-6&

CONTROL BLOCK:

Q tPLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

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LICENSEE CODE 14 15 I.'I CENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

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'DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q1P

~P2 DURING NORMAL OPERATION, TWENTY"TWO EVENTS OCCURRED BETWEEN THE DATES OF MAY 7 AND

~P3 MAY 1 9, WHERE ROD POSITION INDICATION ( RPI ) DI D NOT MEET THE +

1 2 STEP LIMIT OF T.S. 3.1.3.2.

THE ATTACHED SUPPLEMENT DESCRIBES ALL THESE EVENTS.

AFTER THE EVENT B

ON 5 16-78 THE RPI FOR D-8 WAS DECLARED INOPERABLE.

THE ACTION RE(UIREMENT OF 6

T.S. 3.1.3.2a WAS FULFILLED.

PREVIOUS OCCURRENCES OF A SIMILAR NATURE INCLUDE RO-050/315-78-07,04; 77-34,33,28,27, 76-54-44.13; RO-050/316-78-22,08,07.

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SEE SUPPLEMENT 7

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CAUSE

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VALVE CODE CODE SUBCODE COMPONENTCOOE SUBCODE SUBCODE

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COMPONENT Q19

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~Q24 ~ Q26 Q26 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION ANDCORRECTIVE ACTIONS Q27 p

INVESTIGATION REVEALED THE MOST OF THESE EVENTS INVOLVED MEASURING THE AFFECTED ROD'S SECONDARY COIL VOLTAGE TO VERIFY THAT THE ROD WAS AT THE PROPER POSITION.

THE SIGNAL CONDITIONING MODULE WOULD THEN BE CALIBRATED AND PLACED BACK:,IN SERVICE RETURN-3 ING RP I TO WITHIN THE 1, 1 2 STEP LIMIT.

SEVERAL OF THE EVENTS RESULTED WITH RP I RETURNING TO WITHIN THE + 12 STEP T.S.

LIMIT WITHOUT (SEE ATTACHED SUPPLEMENT).

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9 FACILITY STATUS

% POWE R OTHER STATUS Q 0

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10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ [116]

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10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q3

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11 12 13 PERSONNEL INJURIES METHOD OF

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~AQ31 OPERATOR OBSERVNFOt1t 45 46 LOCATIONOF RELEASE Q 45 80 80 80 80 7.

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11 12 LOSS OF OR DAMAGE.TOFACILITY 43 TYPE

DESCRIPTION

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10 P U8 LIC ITY ISSUED DESCRIPTION~

~NQ44 NA Jack Rischling 80 68 69 616 465 59 80 NRC USE ONLY NO 3

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SUPPLEMENT TO

EVENT DESCRIPTION

OF LICENSEE EVENT REPORT 5'78-031/03X-.l THIS IS A LISTING OF EVENTS WHERE RPI DID NOT MEET THE + 12 STEP LIMIT OF T.S. 3.1.3.2 DATE 5/7 5/8 5/8 5/9 5/9 5/10 5/10 5/10 5/10 5/10 5/12 5/14 5/14 5/15 5/15 5/15 5/15 5/1.6 5/16 5/16 5/19 5/19 TIME 2315 1210 1725 1004 2213 0358 1148 1238 2115 2318 0553 2015 2327 0355 0413 1658 2136 0040 0338 0748 0200 1611 ROD POSITION INDICATION AFFECTED D-8,D-12,M-8, H-8 C-9 D-4,D-8,D-12,M-12 D-8 D-4,D-8,D-12,M-B,H-4 D-4,D-8,D-12,M-4,M-B,M-12,H-8 D-B,H-8,D-12 M-B,M-12,H-4 D-12,H-8 D-8,M-4,H-8,H-12 D-4,D-8,D-12,M-12 H-8 H-8 D-8 D-8 D-8 D-8 D-8 D-8 D-8 (D-8 RPI Determined inoperable)

H-8 H-8 SUPPLEMENT TO CAUSE DESCRIPTION ANY CORRECTIVE ACTION.

THE D-8 RPI PROBLEM WAS FOUND TO CAUSED BY A CONNECTOR ON THE REACTOR HEAD, THE PINS WERE RECESSED IN THE CONNECTOR CAUSING THE RPI TO FLUCTUATE AS SHORTS OCCURRED.

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