ML20084L237

Deficiency Rept Re Defective AK-25,AKR-30 & AKR-50 Low Voltage Power Circuit Breakers.Breakers Will Be Returned to Factory for Insp,Repair,Reassembly & Retesting

ML20084L237
Person / Time
Site:	Millstone
Issue date:	04/21/1983
From:	Dixon D GENERAL ELECTRIC CO.
To:	Deyoung R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20084L226	List: ML20084L225 ML20084L237
References
NUDOCS 8405140396
Download: ML20084L237 (1)

Text

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REFERENCE (1)

GENERAL ; ELECTRIC CONTRACTOR l EQUIPMENT  !

BUSINESS ,

cENERAL ELtcTRIC COMPANY 41 WooDFoRo AVENUE. PLAINVILLE. CONN. 06062 Poone tros) 747 7 O PER AT10N S l April 21,1983 f

W. Richard C. DeYoung Director of Office of Inspections  :

U.S. Nuclear Regulatory Comission .  ;

Office of Inspection and Enforcement 4 Washington, D.C. 20555 p

Dear W. DeYoung:

)

The contractor Equipment Business Operations of the General Electric ' -s Company has determined that a reportable defect exists on certain of its ' '

AK-25, AKR-30 and. AKR-50 Low-Voltage Power Circuit Breakers. The  :

following is a text of our notification for your use as necessary:

It has come to our attention that AK-25, AKR-30, and AKR-50 i Low-Voltage Power Circuit Breakers equipped with '

electro-mechanical trip units may contain .assen611es improperly l manufactured such that the circuit breaker fails to trip as  !

intended. These circuit breakers are used in direct current  !

applications. '

The General Electric Company proposes to correct this  !

potential problem in all Nuclear Class IE applications. The  ;

l correction will consist of returning the devices in question to j l the factory for inspection, repair and re-assen61y as necessary, and re-testing to ensure proper operation. General Electric personnel are presently reviewing their files to determine which Nuclear facilities have these breakers and will soon be  ;

contacting the affected Nuclear sites to arrange for the  :

corrections at a mutually convenient time.  !

The potentially affected circuit breakers were manufactured from mid-1976 until March,1983. Only the AK-25 AKR-30, and

)

l AKA-50 Circuit Breakers equipped with electro-mechanical trip  !

units are involved. ,

l If you require any further information, please contact me.  !

s, i VeryTrug 8405140396 840427 PDR ADOCK 05000423 $7' / )' I i

S PDR David . 185, Manager  !

y Qualit' Assurance N*

cit /(1776P) l: l  : M*dN"

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