ML20244A541

Submits Supplemental Response to NRC Bulletin 88-010, Nonconforming Molded Case Circuit Breakers (Mcb). Justification for Continued Operation Will Not Be Prepared Since Traceability of in-stock & Installed Mcbs Established

ML20244A541
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	04/07/1989
From:	Marbaugh K CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-88-010, IEB-88-10, NUDOCS 8904180059
Download: ML20244A541 (1)

Text

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I

. )1 l

e Consumers

@ POWERING MKNIGAN'S PROGRES5 Power

-. General offices: 1945 West Parnatt Road, Jackson, MI 49201 e (517) 788-0550 d

April 7, 1989 Nuclear Regulatory. Commission  !

Document Control Desk Washington, DC 20555 ,

DOCKET 50-155 - LICENSE DPR BIG ROCKLPOINT PLANT -

, NONCONFORMING MOLDED CASE CIRCUIT BREAKERS, SUPPLEMENTAL RESPONSE TO NRC  !

BULLETIN 88-10

'In Consumers Power Company's initial response to NRC Bulletin 88-10, dated March 31, 1989, it was indicated that 71 molded-case circuit breakers (MBC) supplied from Michigan Lectrols Corporation were in stock, and potentially:

untraceable to the original MCB manufacturer. Since that time, it has been determined through contact with the supplier and-MCB manufacturer (Heineman) .

and by examination of the date of manufacture coding on the MCBs that trace-ability to the MCB manufacturer can be established.

The MCBs were ordered and received in 1980. The order was for 80 Type JEl-A3-A- l-3, 250 VAC,1 AMP, 44 Type JEl-B3-A-1-3 50 VDC,1 AMP, and 4

-JEl-A3-A-5-3, 250 VAC, 5 AMP, single pole MCBs. Of the 128 McBs received, 56 have been installed to date (leaving 72 in stock, a correction to the March 31 Bulletin response - 71 JEl-A3-A-1-3 and 1 JEl-B3-A-1-3 remain in stock).

Installation occurred as follows: 1 in 1981, 44 in 1982, 1 in 1983, 1 in 1985, 1 in 1986 and 8 in 1987. All MCBs were installed in the Reactor Protective System. Since traceability of both the in-stock and installed MCBs  ;

has been established, justification (s) for continued operation will not be l prepared, and the 72 MCB will remain in-stock. i p

Kenneth E Marbaugh

. Plant Licensing Engineer CC Administrator, Region III, NRC NRC Resident Inspector - Big Rock Point 890418o059 AD0" f50oo 55 gDR PNUi gy{

OC0489-0118-NLO2 1 0 A CAG ENERGYCOMPANY

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