05000325/LER-1980-085-03, /03L-0:on 801030,switch 3 of 1-B21-LIS-NO31B & D Activated Out of Tolerance.Caused by Instrument Drift. Instruments Recalibr

/03L-0:on 801030,switch 3 of 1-B21-LIS-NO31B & D Activated Out of Tolerance.Caused by Instrument Drift. Instruments Recalibr

ML19345B819
Person / Time
Site:	Brunswick
Issue date:	11/26/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345B815	List: 05000325/LER-1980-085, Forwards LER 80-085/03L-0 05000325/LER-1980-085-03, /03L-0:on 801030,switch 3 of 1-B21-LIS-NO31B & D Activated Out of Tolerance.Caused by Instrument Drift. Instruments Recalibr
References
LER-80-085-03L-01, LER-80-85-3L-1, NUDOCS 8012020569
Download: ML19345B819 (2)

LER-1980-085, /03L-0:on 801030,switch 3 of 1-B21-LIS-NO31B & D Activated Out of Tolerance.Caused by Instrument Drift. Instruments Recalibr

Event date:
Report date:
3251980085R03 - NRC Website

text

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U. 5. NUCLEAR CEGULATORY COMMISSION Nec POmas 386 0 77)

LICENSEE EVENT REPORT V,

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CON'T o 8 tal 61 EVENT DATg 14 7b REPORT 0 ATE 80 6t DOCKET NUMeER I

S EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h -

I El During the performance of Reactor Low Water No. 2 and 3 Channel I

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Calibration and Functional Check, P.T. 3.1.7PC switch 3 of 1-B21-o 4 i

LIS-NO31B and D activated out of tolerance. The NO31B and D I

o 5 l limiting value is > 117" applied water. The NO313 as-found value i

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@l was 125" aonlied water. while the NO31D as-found was 121" 0 7 I anpiled water. This event did not affect the health or safety of the I

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1 Both instruments were calibrated 1

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2 i l and returned to crvice. In addition. reactor level instruments 2-B21-LIS-NO31A I

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G 1 and C were also checked for calibration and found operating satisfactorily.

@l olant nodification has been written to replace this type instrumentation with l

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DESCRIPTION

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PHONE: (010% #A7 0"1 N/.ME OF PREPARER

s LER ATTACIDENT - RO # 1-80-85 Facility: BSEP Unit No. 1 Event Date: 10-30-80 A review of the' calibration history for the B21-LIS-NO31 instruments has resulted in a revision to the present calibration frequency of once per three months to once per month for the following NO31 instruments:

1-B21-LIS-NO31A 1-B21-LIS-NO31B 2-B21-LIS-NO31D This' action should minimize the out-of-calibration occurrences'of these instruments until the analog instruments are installed.

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