05000366/LER-1981-015-03, During Scram Recovery Procedure,H Intermediate Range Monitor 2-C51-K601K,would Not Come on Scale for Overlap Check.Caused by Monitor Pins Pushed Back & Not Making Connection.Pins Repaired

During Scram Recovery Procedure,H Intermediate Range Monitor 2-C51-K601K,would Not Come on Scale for Overlap Check.Caused by Monitor Pins Pushed Back & Not Making Connection.Pins Repaired

ML20003G160
Person / Time
Site:	Hatch
Issue date:	04/21/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003G159	List:
References
LER-81-015-03L, LER-81-15-3L, NUDOCS 8104280408
Download: ML20003G160 (2)

LER-1981-015, During Scram Recovery Procedure,H Intermediate Range Monitor 2-C51-K601K,would Not Come on Scale for Overlap Check.Caused by Monitor Pins Pushed Back & Not Making Connection.Pins Repaired

Event date:
Report date:
3661981015R03 - NRC Website

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On thrch 4,1981, with the reactor mode switch in start-up and Operations l

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Tech Spec Section 3.3.1 requires three operable channels.

l gl IRf "B" was also inop at that time. This is a non-repetitive event.

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There were no effects on the health and safety of the public.

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LER fio. : 50-366/1981-015, R. 1.

V Licensee: Georgia Power Company facility: Edwin I. llatch Docket tio. : '50-366 flarrative Report for LER 50-366/1981-015, R.1.

On 11 arch 4,1981, with the reactor mode switch in start-up and Operations performing II:lP-2-1010, Scram Recovery Procedure, IRli "II" 2C51-K601K, would not come on scale for overlap check between IR;i's and SRtI's which made it inoperative.

Tech Spec Section 3.3.1 requires three operable channels.

IRl1 "B" was also inop at that time.

This requirement was met by operable channels "D" and."F,".. This is a non-repetitive event.

An investigation of the IRf1 found the pins on the range plug, which plugs into the back of the IRM, pushed back and not making a good connection. The pins on the range plug were repaired and the IRIt is now working properly. The surveillance testing was completed sati s factorily.

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.

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