05000366/LER-1981-059-03, /03L-0:on 810622,defective Transmitter 2T48-N0101A Discovered in post-accident Torus Water Level Indicator 2T48-R622A During Testing.Caused by Low Fluid Level in Ref Leg Sensing Line.Line Backfilled

/03L-0:on 810622,defective Transmitter 2T48-N0101A Discovered in post-accident Torus Water Level Indicator 2T48-R622A During Testing.Caused by Low Fluid Level in Ref Leg Sensing Line.Line Backfilled

ML20009C729
Person / Time
Site:	Hatch
Issue date:	07/09/1981
From:	GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009C724	List: 05000366/LER-1981-059, Forwards LER 81-059/03L-0 05000366/LER-1981-059-03, /03L-0:on 810622,defective Transmitter 2T48-N0101A Discovered in post-accident Torus Water Level Indicator 2T48-R622A During Testing.Caused by Low Fluid Level in Ref Leg Sensing Line.Line Backfilled
References
LER-81-059-03L-01, LER-81-59-3L-1, NUDOCS 8107210405
Download: ML20009C729 (2)

LER-1981-059, /03L-0:on 810622,defective Transmitter 2T48-N0101A Discovered in post-accident Torus Water Level Indicator 2T48-R622A During Testing.Caused by Low Fluid Level in Ref Leg Sensing Line.Line Backfilled

Event date:
Report date:
3661981059R03 - NRC Website

text

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NRC FOZM 366 U. S. NUCLEAR REGULATCRY COMMISSION

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60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h 10 l21 l While coeratina at 210R MWt HNP-2-10RO. Surveillanco C h o c k <:. wat ner-I lo ia l I formed.

This procedure revealed a defective transmitter 2T48-N0101A in I

.lo 141 I the ocstaccident torus water level indicator 2T48-R622A. Plant operationl lo is t I was not affected as a result of this event.

The health and safety of I

lo is] I the oublic was not affected.

This is a nonrecetitive event.

A ceneric 1 10171 I review revaaled that Unit 1 uses a different tvoe of indicator.

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33 34 35 36 37 40 di 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i 101 1 Th e cause of this event has been a tt ri b ute[i to low fluid level in the i

11 111 I reference lea sensino line.

MR 2-R1-9793 was w ri tt en tn backfill the I

u_ilj1 low sensino line on the t; ansmitter.

The indicator was declared ooera-I W ltive and returned to service.

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O LER #:

50-366/1981-059 Licensee:

Georgia Power Company Facility Name:

Edwin I. Hatch Docket #:

50-366

Narrative

Report for LER 50-366/1981-059 On 6-22-81, while oper.ating at 86% power, HNP-2-1050, Daily Channel Surveillance Checks, was performed.

This procedure revealed that the postaccident torus water level indicator 2T48-R622A was reading approximately 25 inches higher than the redundant indicator 2T48-R622B.

The indicator was declared inoperative per Tech Specs section 3.3.6.4.a.

This is a

nonrepetitive event.

The cause of this event has been attrib-uted to low fluid level in the reference leg sensing line.

MR 2-81-2723 was written to backfill the low sensing line on transmitter 2T48-N0101A.

The indicator was declared operative and returned to service.

Plant operation was not affected as a result of this event.

The health and safety of the public was not affected.

A generic review revealed that Unit 1 uses a different type of indicator.

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