ML20009D667

LER 81-021/03L-0:on 810621,during Reactor Core Alterations, Communications Were Lost Between Refueling Crew in Containment & Control Room.Caused by Defective Headset Cord at Refueling PA Station Plug.Headset Jack Removed

ML20009D667
Person / Time
Site:	Cook
Issue date:	07/16/1981
From:	Palmer R INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009D658	List: ML20009D657 ML20009D662 ML20009D667
References
LER-81-021-03L, LER-81-21-3L, NUDOCS 8107240262
Download: ML20009D667 (2)

Text

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,Io 121 l DURING CORE ALTERATIONS OF THE REACTOR, COMMUNICATIONS WERE LOST BETWEEN THE REFUELING l i o ,3 , ; CREW IN CONTAINMENT AND THE CONTROL ROOM. THIS WAS CONTRARY TO TPF REQUIREMENTS OF i I o 14 I I TECHNICAL SPECIFICATION 3.9.5. ACTION REQUIREMENTS WERE MET WITH CORE ALTERATIONS l 1 o I s I l BEIhG STOPPED. l lo Is l I .

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33 34 35 31 43 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS li lo i I INVESTIGATION REVEALED THAT THE CAUSE OF THE LOSS IN COMMUNICATIONS WAS DUE TO A - j ii ,i j l DEFECTIVE HEADSET CORD AT THE REFUELING PA STATION PLU'i. TWO HEADSET CORDS WERE I

SOLDERED 70GETHER A'T THE PLUG TO ENABLE THE REFUELING CREW TO HAVE ADDITIONAL HEADSETS ATl

,,,,,;THE SAME LOCATI0h. THE WIRES INSIDE THE PLUG WERE SHORTED OUT WHICH CAUSED THE LOSS OF l

,, g ,; COMMUNICATION. THE SIMPLE REMOVAL 0F THE HEADSET JAL (SEE ATTACHED SUPPLEMENT)  ;

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63 69 I!II!!I1 i llI II 30 5 NAME OF DAEPARER PHONE:

F ATTACHMENT TO LER # 81-021/03L-0 SUPPLEMENT TO CAU<E DESCRIPTION l

FROM THE PLUG WOULD HAVE ALLOWED THE CREW TO USE THE HANDSET AND CONTINUE COMMUNICATION. AN ADDITIONAL JACK HAS BEEN INSTALLED ON EACH OF THE REFUELING PA STATIONS TO ALLOW TWO SINGLE PLUG HEADSET CORDS TO BE USED.

THE USE OF DOUBLE HEADSET CORDS HAS BEEN DISCONTIt:UED. THE DEFECTIVE CORD WAS REPLACED AND THE SYSTEM WAS RETURfF.D TO SERVICE.