ML17317A901

LER 78-031/03X-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

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: ML17317A897 ML17317A899 ML17317A901 ML17331A139
References
LER-78-031-03X, LER-78-31-3X, NUDOCS 7901260171
Download: ML17317A901 (4)

Text

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

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

CONTROL BLOCK:

I 6 Q tPLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 7 8 9 N 1 0 LICENSEE CODE C C ZQ2 14 15 0 0 0 0 I.'I 0 0 CENSE 0

NUMBER 0 0 0 0 25 Qs 26 1 1 LICENSE TYPE 1 1 30 ps~ps 57 CAT 58 CON'T

~P1 """ ~LQB 0 5 0 0 0 3 1 6Q7 0 5 0 7 7 8QBO I I 9 7 9 80 QB

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

~P2 DURING NORMAL OPERATION, TWENTY"TWO EVENTS OCCURRED BETWEEN THE DATES OF MAY 7 AND 9, POSITION INDICATION ( RPI ) DI D NOT MEET THE + 1 2 STEP LIMIT OF

~P3 -

MAY 1 WHERE ROD 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.

~P B SEE SUPPLEMENT 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE

~OB 7 8 9 CODE 10 Q11 CODE 2

11 Q12 SUBCODE

~1Q13 12 SEQUENTIAL 13 I

COMPONENTCOOE N S T R 0 18 OCCURRENCE 64 ~p SUBCODE 19 REPORT SUBCODE

~Z 20 Q16 REVISION 21 22 23 24 26 27 28 29 30 31 32 ATIACHMENT NPRDNI PRIME COMP. COMPONENT

~

FUTURE EFFECT SHUTDOWN lAUCTION 33 Q19 ~z 34 Q19 ~z 35 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 Q20 ~

36 Q21 37 40

~

41 Q23 ~Q24 42 43 Q26 44 47 Q26 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-ING RP I TO WITHIN THE 1, 1 2 STEP L IMIT . SEVERAL OF THE EVENTS RESULTED W I TH RP I 3

RETURNING TO WITHIN THE + 12 STEP T.S. LIMIT WITHOUT (SEE ATTACHED SUPPLEMENT).

7 8 9 80 FACILITY STATUS  % POWE R OTHER STATUS Q METHOD OF ~

6 8 9 2 ps~07 10 0 Qs 12 13 NA 44

~AQ31 45 46 OPERATOR OBSERVNFOt1t 80 7

ACTIVITY RELEASED OF RELEASE CONTENT AMOUNT OF ACTIVITY NA Q LOCATION OF RELEASE Q

[116] Z Q33 Z Q34 44 45 80 7 8 9 10 11 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q3

~oo o Q32~zpss NP 12 13 80 7 8 9 11 PERSONNEL INJURIES

7. 8 9 11 12 80 LOSS OF OR DAMAGE.TO FACILITY 43 TYPE DESCRIPTION 9 Z Q42 NA 8 9 10 80 P

P U 8 L I C I TY ISSUED

~NQ44 DESCRIPTION ~ NA NRC USE ONLY N

O 3

9 10 68 69 80 o 7 8 Jack Rischling 0 616 465 59 NAME OF PREPARER

f 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 TIME ROD POSITION INDICATION AFFECTED 5/7 2315 D-8,D-12,M-8, H-8 5/8 1210 C-9 5/8 1725 D-4,D-8,D-12,M-12 5/9 1004 D-8 5/9 2213 D-4,D-8,D-12,M-B,H-4 5/10 0358 D-4,D-8,D-12,M-4,M-B,M-12,H-8 5/10 1148 D-B,H-8,D-12 5/10 1238 M-B,M-12,H-4 5/10 2115 D-12,H-8 5/10 2318 D-8,M-4,H-8,H-12 5/12 0553 D-4,D-8,D-12,M-12 5/14 2015 H-8 5/14 2327 H-8 5/15 0355 D-8 5/15 0413 D-8 5/15 1658 D-8 5/15 2136 D-8 5/1.6 0040 D-8 5/16 0338 D-8 5/16 0748 D-8 (D-8 RPI Determined inoperable) 5/19 0200 H-8 5/19 1611 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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