ML19350E283

LER 81-019/03L-0:on 810514,level Recorder 5049 Was Found Indicating High.Caused by Calibr Shift Due to Jarring Instrument Sensing Lines During Installation of Torus Room Staging.Recorder & Transmitters Recalibr

ML19350E283
Person / Time
Site:	Pilgrim
Issue date:	06/10/1981
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19350E280	List: ML19350E279 ML19350E283
References
LER-81-019-03L, LER-81-19-3L, NUDOCS 8106170236
Download: ML19350E283 (1)

Text

NRC FC'.JM 366 U. S. NUCLEAR REGULATORY CLMMISSION (7 77)

LICENSEE EVENT REPORT (PLEASE PRINT CR TYPE ALL REQUIRED INFORMATION)

( [) CONTROL BLOCK: l l l l l l lh lo l t l l Mj Al Pl Pl Sl 1l@l 0l 0l -l 0lLICENSE Ol Ol Ol 0l -l 0l Ol@l4 NUMSER 25 26 l1 LICENSE l 111TYPE l 1JOl@l$7 CAT l

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7 8 9 LICENSEE CODE 14 15 CON'T .

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Iol11 3o'URCE l L )@l DOCKET Ol 5NUMSER l 01 -l Ol6d2l 969 l 3 EVENT @i DATE0 15 l 1 l4 I 8 l1REPORT 74 75 )@lOATE0 l 6 80l 1 l 0 l 8 l 7 S 60 61 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES O'o lol2l l On May 14, 1981 at approximately 1245 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.737225e-4 months <br />, while performing the daily surveillance I ig,3,  ; cheelc of the torus water level instrumentation, operating personnel determined that I

o ,,i ; level recorder 5049 was indicating high and did not meet the acceptance criteria spectl-loIsl 1 fied in station surveillance test numbr 2.1.15.

An investigation revealed that the_J lo l6 j l instrument was approximately four percent out of calibration. Tne instrument was ad d l 0 l 7 l l ju3ted, TOCalibrated and returned to service the same day. This minor calibration l Ioisl I problem could not permit torus water level to exceed the technical specification limilt.

SYSTEM CAUSE CAUSE CCMP. VALVE CODE CODE SU8 CODE COMPONENT CODE SUSCODE SUSCODE loI91 7 8

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EVENT YE A R REPORT NO. CODE TYPE NO.

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,_ 21 22 23 24 26 27 28 29 30 31 02 HOURS SS 4 FOR B. SL PP E MANUFA URER T N AC . O P NT M l35 Zl@ [N,j @ [N,j@ l,,,,3]h l44F !1 lA lC47l@

lE 33 l@lZ 34 i@ l Z lh ' 31l010l0l0I40 36 41 42 43 CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS l i l o l l Investigation by I&C personnel indicated that the recorder and its nssocinend rnne- 1 i , , , i lmitter were slightly out of calibration. This calibration shif t is believed en havo I I i i 2 I bl een caused by jarring of the instrument sensing lines during the installation of I

, ; 3 g l torus room s taging. The level recorder and its associated transmitter LR 5049 and I ii,4 i ]LT 5049 respectivelv.were recalibrated and returned to service. 80 I

% POWER OTh ER STATUS On RY DISCOVERY OESCRIPTION A

N.A. Routine Testing l I1 i s8 l9lF l@ l to0 l 9 l 512l@l13 44 l lB[@l 45 46 80 7

ACTtvlTV CONTENT AMOUNTOF ACTIVITY LOCATION OF RELEASE RELEASED OF RELEASE N.A. N.A. l l 1 i s l l Z l @ [Zj@l 44 l l 45 80 7 s 9 10  :

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NUMSER D ESCR'*TICN

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l li 181 7 d 9 1010 l0 l@l12 11 80 LOS$ OF OR OAMAGE To FACIUTY -

TYPE DESCRIPTION .

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,l 1 l9l @l10 80 7 8 9 NRC USE ONLY issuEo PusuCnv DESCmPTioN @,3 l, 1 2 a ;[.. g fc' *' ' ' f . .' d $

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M C M. Thomas McLoughlin pgoug 617-746-7900 2,

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