ML20197D508

LER#78-051/01X-0 on 781030:# of Operable Srm'S Was Reduced Below Minimum Req When SRM a Was Jumpered to Eliminate Problems W/Downscale Rod Block.Caused by Inadvertent Jumpering of Entire a SRM Trip Logic.Procedures Being Rev

ML20197D508
Person / Time
Site:	Pilgrim
Issue date:	11/22/1978
From:	BOSTON EDISON CO.
To:
Shared Package
ML20197D498	List: ML20197D494 ML20197D508
References
LER-78-051-01X, LER-78-51-1X, NUDOCS 7811280335
Download: ML20197D508 (1)

Text

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DATE EVENT DESCRIPTION AND PROB ADLE CONSEQUENCES h

[TF1 I on 11/21/78, PNPS management was informed of OA audit 78-18, which identified an oc- l l currence that was contrary to limitin'g conditions for operations as specified in T.S. J

[ section 3.2.C.1 and Table 3.2.c. On 10/30/78 the number of operable SRMs was reduced l gl below the minimum required when SRM "A" was jiimpered to eliminate problems with the g f g downscale rod block. A reactor startup was in progress and SRM "D" was already by-  ;

g[ passed because of a failed detector. g a l . l ,

B 9 60 SYSTEM CAUSE C A U';E COMP, VALyt CODE CODE SUBCODE CDMPoNENT CODE SUBCODE SUBCODE h 6 lI l A l@ l Al@ l C l@ l Il Nl S l T [R lU l@ W@ lg l@

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SEQUE NTI AL HEPORT NO.

OCCURRENCE REFORT REVISION j-LER CODE TYPE No.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h

! j o j l This event occurred when maintenance and repair personnel inadvertently jumpered out thel I I gl entire "A" SRM trip logic ins tead of only the downscale trip as approved by ORC. l l

l Station procedure 3.M.1-3 is being revised to require ORC approval of the specific l l location of jumper terminals to ensure that only those fanctions which are not required l l

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,4 ; l are affected. l [

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80 ST S  % POWER OTHE R ST ATUS IS TY DISCoVEflY DESCillPTION

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nELE ASED OF nELE ASE AMOUNT OF ACTIVITY LOCATION OF nELEASE I I l c,I I z l @ l Z i@l N.A. I I N.A. l l l 8 9 10 11 44 45 80 l l'ENSONNE L EXPOSURES - I NOVHE R TYPE DESCRIPTION i g l 0 l 0 l 0 l@l Z l@l N.A. l ,

FERSONNE L INJUI IES NUMDEH OESCitiPTION

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11 12 00 LOSS or oft DAuAct 10 rACILITY 1YPE D E T.CulP 1 t ON

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i 617-746-7900 o '

NAMFOfPHEVAHE n PHONG: ",

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