ML20039D285

LER 81-067/03L-0:on 811120,81-psi Control Air Header Was Out Inadvertently During Installation of NUREG-0737 Design Change,Causing Normal Letdown Isolation Valve QCR-300 to Close.Shift Supervisor Reinstructed

ML20039D285
Person / Time
Site:	Cook
Issue date:	12/21/1981
From:	Don Krause INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20039D257	List: ML20039D256 ML20039D285
References
RTR-NUREG-0737, RTR-NUREG-737 LER-81-067-03L, LER-81-67-3L, NUDOCS 8112310492
Download: ML20039D285 (1)

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NRC FORM 3G6 U. S. NUCLE AR REGUL ATORY COMMISSION (7 77)

LICENSEE EVENT REPORT

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI CONTROL BLOCK: l i

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CON'T LO_L' I 7 8 5fRMlLl@l 60 61 01510101013l116l@l1111210l811l@l11212111811l@

DOCKk f NUMBER 68 69 EVENT DATE 14 75 RFPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I

I o 12 l lAN EVENT OCCURRED AS THE RESULT OF A PLANNED ENTRY INTO AN ACTION ITEM TO INSTALL A l

I O i a l l NUREG-0737 DESIGN CHANGE. THIS RE0VIRED THE ISOLATION OF THE 50 PSI CONTROL AIR iOla11 HEADER. INADVERTENTLY THE 85 PSI CONT. AIR HDR. WAS CUT. THIS CAUSED THE NORMAf I 1

iOIsi ILETDOWN ISOLATION VALVE OCR-300 TO CLOSE. VALVE WAS RLOCKED OPEN AND OPERATOR 1

I o is I l STATIONED AT THE MANUAL ISOLATION VALVE IN ORDER TO MAINTAIN NORMAL I ETDOWN FLOW.

I O I 7 I l THIS IS CONTRARY TO T.S. 3.6.1.1. I I

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7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION EVENT YE AR REPORT NO. CODE TYPE N O.

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44 3J 34 35 36 40 di 42 43 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Ii l o l l THE VALVE WAS BLOCKED WITH THE SHIFT SUPERVISORS KNOWLEDGE WITH ISOLATION CAPABILITY I I

lilil l ASSURED BY STATIONING AN OPERATOR AT MANUAL ISOL. VALVE. THE S.S. HAS BEEN REIN-I ii i2 I STRUCTED THAT AUT0. ISOLATION FEATURES CAN NOT BE DEFEATED. THIS EVENT WILL BE I

I i I a 1 i REVIEWED BY ALL LICENSED OPERATORS.

1 li14l l ST S *s POWER OTHER STATUS DIS O RY DISCOVERY DESCRIPTION 32 N/A NOTIFIED BY CONSTRUCTION PERSONNEL l 11 Is l [E_J@ l1 l 010 l@l l l l@l ACTIVITY CO RENT AMOUNT OF ACTIVITY LOCATION OF RELE ASE I 516 iRELEASE Lz_j @D OF RELEASEI.zjgl N/A l l N/A [

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