05000293/LER-1981-019-03, /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

/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: 05000293/LER-1981-019, Forwards LER 81-019/03L-0 05000293/LER-1981-019-03, /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
References
LER-81-019-03L, LER-81-19-3L, NUDOCS 8106170236
Download: ML19350E283 (1)

LER-1981-019, /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

Event date:
Report date:
2931981019R03 - NRC Website

text

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

LICENSEE EVENT REPORT

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S 60 61 DOCKET NUMSER 6d 69 EVENT DATE 74 75 REPORT OATE 80 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

cheelc of the torus water level instrumentation, operating personnel determined that I ig,3,

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

An investigation revealed that the_J loIsl 1 l nstrument was approximately four percent out of calibration.

Tne instrument was ad d i

lo l6 j l 0 l 7 l l ju3ted, TOCalibrated and returned to service the same day.

This minor calibration l

I problem could not permit torus water level to exceed the technical specification limilt.

Ioisl SYSTEM

CAUSE

CAUSE CCMP.

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l i l o l l Investigation by I&C personnel indicated that the recorder and its nssocinend rnne-i,,, i lmitter were slightly out of calibration.

This calibration shif t is believed en havo I I i i 2 I l een caused by jarring of the instrument sensing lines during the installation of I

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, ; 3 g l torus room s taging.

The level recorder and its associated transmitter LR 5049 and I

I ii,4 i ]LT 5049 respectivelv.were recalibrated and returned to service.

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