05000324/LER-1979-062-03, /03L-0 on 790726:while Performing Reactor Low Level Calibr & Functional Test,Instruments 2B21-LIS-N031 C & D Were Out of Calibr.Caused by Instrument Drift.All Switches Recalibr

/03L-0 on 790726:while Performing Reactor Low Level Calibr & Functional Test,Instruments 2B21-LIS-N031 C & D Were Out of Calibr.Caused by Instrument Drift.All Switches Recalibr

ML19291B164
Person / Time
Site:	Brunswick
Issue date:	08/24/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19291B151	List: 05000324/LER-1979-062, Forwards LER 79-062/03L-0 05000324/LER-1979-062-03, /03L-0 on 790726:while Performing Reactor Low Level Calibr & Functional Test,Instruments 2B21-LIS-N031 C & D Were Out of Calibr.Caused by Instrument Drift.All Switches Recalibr
References
LER-79-062-03L, LER-79-62-3L, NUDOCS 7908290563
Download: ML19291B164 (2)

LER-1979-062, /03L-0 on 790726:while Performing Reactor Low Level Calibr & Functional Test,Instruments 2B21-LIS-N031 C & D Were Out of Calibr.Caused by Instrument Drift.All Switches Recalibr

Event date:
Report date:
3241979062R03 - NRC Website

text

WC FORM 366 u > t:Ut.LL AH HEGut AIOity COMMISSION i777)

LICENSEE EVENT REPORT CONTROL DLOCK: l l

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(PLEASE FRINT OR TYPE ALL REQUIRED INFORMATIONI lNlC B l E l P l 2 ()l 0 l 0

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EVENT DA1E 14 15 HEPOHT DATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCtiS h lo 2

While perf,rming PT 3.1.7PC. Reactor Low Leyel #2 and #3 CalibIntion and Functional l

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l Test, instruments 2B21-LIS-N031 C and D vere out 6f cal _i_bration.

The readings were l

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Instrument As Found Limit l

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[ 2B21-LIS-N031C Switch 1

- 164" H O A -147.5" H O I

2 2

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2

- 164" H O A-147.5" H O l

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3

- 49" H O

- 38" H O (CON'T1 I

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43 41 42 43 44 47 CAUSE DESCRIPTION AND CORNECTIVE ACIlONS h 1

o lThe cause of the failure was instrument drift. All locking screws and adiustment de-I i

[ vices were found to be securely tightened and in proper workinn order. All wit chna l

[were recalibrated and 1cft in satisfactory condition. As a result of these problems. 1 i

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[ plant modifications have been written to replace these instruments with an analon l

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l instrumentation system during the 1980 refueling outage.

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919-457-9521

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LER CONTINUATION - RO# 2-79-062 Facility:

BSEP Unit No. 2 Event Date:

7-26-79 EVENT DESCI.IPTION AND PROBABLE CONSEQUENCES:

Instrumant As Found Limit 2B21-LIS-NO31D Switch 1

- 166" 11 0 Q-147.5" 1I 0 2

2 2

- 160" 11 0 h-147.5" 11 0 2

2 3

- 47" 11 0 h-38" 11 0 2

2 Technical Specifications 3.1.3, 6.9.1.9a 2012 F2 O

4