ML18043A923
| ML18043A923 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 07/03/1979 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 7908080309 | |
| Download: ML18043A923 (2) | |
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consumers Power company General Offices: 212 West Michigan Avenue, Jackson, Michigan 49201
- Area Code 517 788-0550 July 3, 1979 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255'- LICENSE DPR P_l.\\LISADES PLANT -
IE BULLETIN 79-11 C
Consumers Power Company's response to IE Bulletin 79-11 is as follows:
Item 1 Determine whether circuit breakers of the above described manufacturer and type with overcurrent trip devices are in safety related Class IE service or in spares at your facilities.
Response
No Westinghouse type DB-75 or DB-50 circuit breakers with overcurrent trip devices are used in safety-related Class IE servi~e or in spares at the Palisades Plant.
Item 2 If the subject breakers are in service in safety-related systems:
within 30 days, review the existing test data for all over current trip device cali-brations since plant startup or since replacement caps were installed and tested in response to Bulletin 73-1, whichever is most recent.
Determine if any delay times are:
(1) outside of the acceptance band; (2) marginally acceptable - on the low side of the acceptance band; or (3) if any significant change in delay time :performance has been observed.
These breakers should be retested and end caps replaced as necessary to assure no loss of safety fun ct ion.
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Response
Not applicable; see Item l above.
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Item 3 Inspect all end caps in spares for cracks using at least a 3x magnifying. glass.
Caps having visible flaws should be discarded or prevented from use in Class IE applications.
Response
Not applicable; see Item 1 above.
Item 4 Review test procedures and test schedules for all safety-related circuit breakers to assure that all such breakers are tested at least each refueling outage to confirm overcurrent time delay protection.
Response
Not applicabl~; see Item 1 above.
. David P Hoffman (Signed)
David P Hoffman Assistant Nuclear Licensing Administrator CC Director, Office of Nuclear Reactor Regulation Director, Offi~e of Inspection and Enforcement