ML20244A541
| 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) | |
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@ POWERING e
Consumers Power MKNIGAN'S PROGRES5 d
-. General offices: 1945 West Parnatt Road, Jackson, MI 49201 e (517) 788-0550 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 f50oo 55 AD0" gDR PNUi gy{
1 0 OC0489-0118-NLO2 A CAG ENERGYCOMPANY
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