05000321/LER-1979-085-03, /03L-0:791013,while Performing HNP-1-3410,reactor Core Isolation Cooling Steam Line Flow Functional Test & Calibr,Switch Contacts for 1E51-N017 Failed.Caused by Instrument Drift.Switch Calibr & Set to Correct Setpoint

/03L-0:791013,while Performing HNP-1-3410,reactor Core Isolation Cooling Steam Line Flow Functional Test & Calibr,Switch Contacts for 1E51-N017 Failed.Caused by Instrument Drift.Switch Calibr & Set to Correct Setpoint

ML19254E572
Person / Time
Site:	Hatch
Issue date:	10/25/1979
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19254E566	List: 05000321/LER-1979-085, Forwards LER 79-085/03L-0 05000321/LER-1979-085-03, /03L-0:791013,while Performing HNP-1-3410,reactor Core Isolation Cooling Steam Line Flow Functional Test & Calibr,Switch Contacts for 1E51-N017 Failed.Caused by Instrument Drift.Switch Calibr & Set to Correct Setpoint
References
LER-79-085-03L-01, LER-79-85-3L-1, NUDOCS 7911010490
Download: ML19254E572 (1)

LER-1979-085, /03L-0:791013,while Performing HNP-1-3410,reactor Core Isolation Cooling Steam Line Flow Functional Test & Calibr,Switch Contacts for 1E51-N017 Failed.Caused by Instrument Drift.Switch Calibr & Set to Correct Setpoint

Event date:
Report date:
3211979085R03 - NRC Website

text

U.S. NUCLEAR REGULATORY COMMISSION aff""'"_;

UCENSEE EVENT REPORT CONTROL BLOCK: l l

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l l lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 HEPORT DATE 80 EVENT DESCRIPTION A*'O PROD ABLE CONSEQUENCES h l While performing HNP-1-3410, RCIC Steam Line Flow Functional Test and Calibration, at l o

2 steady state power operat on, instrument 1E51-N017 switch contacts No. 2 failed to g

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l l actuate within Tech Specs limits (<+182 + 16 in. H;0 tread correction).

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There was no ef fect on safe plant operation since instrument ;

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s l 1E51-N018 was operating and available for the same function. This is a re-occurring l

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