05000336/LER-1981-025-03, /03L-0:on 810615,span Gas Voltage on Hydrogen Analyzer B Found Out of Spec.Caused by Instrument Drift Due to High Temp within Analyzer Cabinets.Temp Control Switch Reset

/03L-0:on 810615,span Gas Voltage on Hydrogen Analyzer B Found Out of Spec.Caused by Instrument Drift Due to High Temp within Analyzer Cabinets.Temp Control Switch Reset

ML20009E937
Person / Time
Site:	Millstone
Issue date:	07/14/1981
From:	Criscione J NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009E921	List: 05000336/LER-1981-025, Forwards LER 81-025/03L-0 05000336/LER-1981-025-03, /03L-0:on 810615,span Gas Voltage on Hydrogen Analyzer B Found Out of Spec.Caused by Instrument Drift Due to High Temp within Analyzer Cabinets.Temp Control Switch Reset
References
LER-81-025-03L, LER-81-25-3L, NUDOCS 8107280554
Download: ML20009E937 (1)

LER-1981-025, /03L-0:on 810615,span Gas Voltage on Hydrogen Analyzer B Found Out of Spec.Caused by Instrument Drift Due to High Temp within Analyzer Cabinets.Temp Control Switch Reset

Event date:
Report date:
3361981025R03 - NRC Website

text

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LICENSEE EVENT REPORT

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CON Hot 6' OM: l_j b] j_j_j (PLEASE PRINT OR TYPE Alt. REQUIRED INFORMATION)

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8 60 61 DOCKET NUYSER tvENT otsCaie rlON AND PnOB ABLE CONSEQUENCES [bT27 i With the plant at 100 percent power level, and_ dtttingloulime.SurXeillance_of_the_-___]

hydrogen analyzer, the span gas voltage (4 percent hydrogen) was found.out of spec __

1 p;qy] j joj4j l low on the "B" Hydrogen analyzer. The "A" Hydrogen analyzer was verified operable

__J Io ls) I and in spec and the Plant 6perated in accordance with the Action Statement of Section l

g yg ; 3.6.4.1 of Technical Specifications. The 'B' Hydrogen analyzer was readjusted within _J g }p ; spec, and returned to service within 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

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lTTTJ I The cause of the out of sp_ec condition on the 'B' Hydroge_n_analyz_elues instrument drift due to high temperature within the analyzer cabinets. The_tegeratura 1

ITJT] I g l control switch for the heater element was reset, the cabinet allowed to stabilize _._ J a

the ' span gas voltage readjusted within applicable ranges, and the 'B' Hydrogen

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i 4 l analyzer returned to service within 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

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