05000321/LER-1981-058-03, /03L-0:on 810619,drywell 7 Torus Hydrogen & Oxygen Analyzers Were Found Inoperative During Hot Standby. Caused by Instrument Drift.Instruments Recalibr

/03L-0:on 810619,drywell 7 Torus Hydrogen & Oxygen Analyzers Were Found Inoperative During Hot Standby. Caused by Instrument Drift.Instruments Recalibr

ML20009G739
Person / Time
Site:	Hatch
Issue date:	07/21/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009G726	List: 05000321/LER-1981-058, Forwards LER 81-058/03L-0 05000321/LER-1981-058-03, /03L-0:on 810619,drywell 7 Torus Hydrogen & Oxygen Analyzers Were Found Inoperative During Hot Standby. Caused by Instrument Drift.Instruments Recalibr
References
LER-81-058-03L-01, LER-81-58-3L-1, NUDOCS 8108040611
Download: ML20009G739 (2)

LER-1981-058, /03L-0:on 810619,drywell 7 Torus Hydrogen & Oxygen Analyzers Were Found Inoperative During Hot Standby. Caused by Instrument Drift.Instruments Recalibr

Event date:
Report date:
3211981058R03 - NRC Website

text

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NRC F RZO366 U. S. NUCLEA] RE!ULATCY COMMISSION

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60 61 DOCKET NUMBER 68 69 EVENT DATE 24 75 REPORT D ATE 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h lo l2] l While the unit was in startuD and hot standbv at 192 MWt. the devwell and I

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torus hydrogen and oxygen analyzers were found inoperative.

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LC0 as a result of this event.

The health and safety of the public wa:.

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not affected.

This event was repetitive as last reported on Reportable 1

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33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l oj l The Cause of this event has been attributed to instrument drift.

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LER No.:

50-321/1981-058 Licensee:

Georgia Power Company Facility:

Plant E. I. Hat::h Pocket No.:

50-321

Narrative

P.eport for LER 50-321/1931-058 While the unit was in startup and hot standby made at 192 twt, the drywell and torus hydrogen and oxygen analyzers were found inoperative.

Tech Specs 3.2-11.11 requires one operable analyzer.

The unit was placed in a 30 day LCO as a result of this event The health and safety of the public was not a f fected.

This event was repetitive as last reported on Reportable Occurrence Peport ?:o. 50-321/1981-054 In preparing for a drywell entry, venting of the drywell was begun at 2205 hrs.

on June 13, 1981.

At 0530 hours0.00613 days <br />0.147 hours <br />8.763227e-4 weeks <br />2.01665e-4 months <br />, June 19, 1981, the drywell and torus hydrogen and oxygen analyzers indicated 75 oxygen.

Lab analysis of a sample indicated the true oxygen content was 18%.

Both analyzers were calibrated and returned to service.

The cause of this event has been attributed to instrument drift.

A generic review revealed no inherent problems. A different type analyzer is used on Unit II.

This report is being submitted at a time beyond 30 days of the discovery date due to personnel error.

The monitoring system has been reviewed and the appropriate personnel counseled to prevent future occurrences of this type.

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