05000366/LER-1981-015-03, /03L-0:on 810304,intermediate Range Monitor H (2C51-K601H) Would Not Come on Scale for Overlap Check Between Intermediate & Source Range Monitors During Scram Recovery Procedure HNP-2-1010.Caused by Pushed Back Pins

/03L-0:on 810304,intermediate Range Monitor H (2C51-K601H) Would Not Come on Scale for Overlap Check Between Intermediate & Source Range Monitors During Scram Recovery Procedure HNP-2-1010.Caused by Pushed Back Pins

ML19350B839
Person / Time
Site:	Hatch
Issue date:	03/17/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19350B837	List: 05000366/LER-1981-015, Forwards LER 81-015/03L-0 05000366/LER-1981-015-03, /03L-0:on 810304,intermediate Range Monitor H (2C51-K601H) Would Not Come on Scale for Overlap Check Between Intermediate & Source Range Monitors During Scram Recovery Procedure HNP-2-1010.Caused by Pushed Back Pins
References
LER-81-015-03L, LER-81-15-3L, NUDOCS 8103230833
Download: ML19350B839 (2)

LER-1981-015, /03L-0:on 810304,intermediate Range Monitor H (2C51-K601H) Would Not Come on Scale for Overlap Check Between Intermediate & Source Range Monitors During Scram Recovery Procedure HNP-2-1010.Caused by Pushed Back Pins

Event date:
Report date:
3661981015R03 - NRC Website

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LER flo.: 50-366/1980-015 Licensce: Georgia Power Company facility: Edwin 1. Hatch Docket No. : 50-366

Narrative

Report for LER 50-366/1931-015.

On flarch 4,1981, with the reactor mode switch in start-up and operations performing ifNP-2-1010, Scran Recovery Procedure, IRfi H (2C52-K601K) would not come on scale for overlap check between IRM's and SRM's which nade it Tech Spec Section 3.3.1 requires two operable channels. IRt!

inoperative.

"B" was also inop at that time.

This requirement was met by operable chan-nel s " D" and " F". This is not a repetitive event.

An investigation of the IRM found the pins on the range plug, which plugs into the back of the IRM, pushed back and not naking a good connection.

The pins on the range plug were repaired and the IRM is now working properly.

The surveillance testing was completed satisfacterily.

A generic review revealed no problems with the range plugs on the Unit I IRM's.

There were no effects to public health and safety due to this event.