05000293/LER-1981-014-03, /03L-0:on 810414,pressure Instrument 261-39B Indicating Needle Went Beyond Mechanical Stop.Caused by Technician Error.Instrument Repaired.Technician Instructed

/03L-0:on 810414,pressure Instrument 261-39B Indicating Needle Went Beyond Mechanical Stop.Caused by Technician Error.Instrument Repaired.Technician Instructed

ML20004B397
Person / Time
Site:	Pilgrim
Issue date:	05/18/1981
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20004B395	List: 05000293/LER-1981-014, Forwards LER 81-014/03L-0 05000293/LER-1981-014-03, /03L-0:on 810414,pressure Instrument 261-39B Indicating Needle Went Beyond Mechanical Stop.Caused by Technician Error.Instrument Repaired.Technician Instructed
References
LER-81-014-03L, LER-81-14-3L, NUDOCS 8105280173
Download: ML20004B397 (1)

LER-1981-014, /03L-0:on 810414,pressure Instrument 261-39B Indicating Needle Went Beyond Mechanical Stop.Caused by Technician Error.Instrument Repaired.Technician Instructed

Event date:
Report date:
2931981014R03 - NRC Website

text

NRC PORM 366 U. S. NUCLEAR RE2ULATORY COMMISSION (7 77)

.LIL 'JSEE EVENT REPORT CONTROL BLOCK: l l

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UCENSE NUM8ER 25 26 UCENSE TYPE JC 57 CAT 58 COwT IoIiI C R$ l L ]@l O l 5l01-l0121913@l014 11 l418l1l@l0l5l1I8l8l1l@

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60 61 DOCK ET NUMB ER 68 59 EVENT QATE 14 75 REPORT DATE 80 EVENT OESCRIPTION AND PROBASLE CONSEQUENCES h l o 121 l On April 14, 1981 at approximately 2145 hours0.0248 days <br />0.596 hours <br />0.00355 weeks <br />8.161725e-4 months <br /> while perforning surveillance test I

i O ; 3, l number 8.M.2-2.2.1 entitled " Recirculation System OP", pressure instrument 261-39B l J o t 4 l I was determined to be inoperable. This instrument is one of four channels which I

loisl l contribute to each loop selection logic section of the LPCI mode of the RHR system. I I o !6 I l While pressurizine the instrtiment the indicatine needle went bevond its mechanical j l

l o 171 I stoo resultine in the innhility o f th e innernmant en rosnnnd.

The i n m e rnmon t uns l o ie i l immediately repaired & returned to service. This was an isolated event.

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33 34 35 36 31 40 41 42 43 44 47 CAUSE OESCRIPTION AND CORRECTIVE ACTIONS l i I o l l This instrument problem resulted from a technician error in judgement during the

,,,1 i i performance of the above surveillance test.

To preclude recurrence of this type of I event the bechnician was immediately instructed as to the proper methods to use in 1

,, 121 i i, ;3j l the performance of this test.

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% POWER OTHER STATUS 01 RY DISCOVERY DESCRIPTtON li I 5 l l El@ l 1l 0l 0l@l N.A.

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7 Mr. M. Thomas McLoughlin

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