ML19256B997
| ML19256B997 | |
| Person / Time | |
|---|---|
| Site: | Columbia, Washington Public Power Supply System, Satsop  |
| Issue date: | 08/06/1979 |
| From: | Renberger D WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| NUDOCS 7910030375 | |
| Download: ML19256B997 (2) | |
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Washington Public Power Supply System A JOINT OPERATING AGENCY g
P O. Don 9 6 8 3000 Gro W ASHWGros W A Y RIC M L ND W A SH e% G FON 99352 PHONE (509) 3 75-5000 Docket Nos. 50-4G0 50-513 August 6, 1979 50-397 50-509 50-508 4 4'
[g d? "/,N: 'n Nuclear Regulatory Commission Suite 202, Walnut Creek Plaza 1990 fl. Cali fornia Boulevard Wal nut Creek, CA 94996 l-i 0,-
Attention:
Mr. R. H. Engelken, Director o
N
Subjec t:
HPPSS NUCLEAR PROJECTS NOS.1, 2, 3, 4 ArtD 5, IE BULLETIN (10. 79-11
Dear fir. Engelken:
In response to the subject bulletin, WPPSS submits the following information for its projects UNP-1, 2, 3, 4, and 5.
WN P-2 A review of the circuit breakers at the WNP-2 facility revealed that no Westinghouse type DB-50 or DB-75 circuit breaker is used in safety related systens.
Our 480V class breakers are Westinghouse type DS breakers with type LS trip units.
UNP-l/4 UESC's engineering has determined that Westinghouse type DB-50 and DB-75 circuit breakers are not being used on WNP-1/4
.. should be noted that Babcock and Wilcox has not yet selected the circuit breakers for the control rod drive tripping function redesign. A copy of IE Bulletin Tb. 79-11 has been sent to B&W to advise them of the problem with the Westinghouse breakers.
WN P-3/ 5 The Westinghouse DB-50 and DB-75 circuit breakers are not used on WNP-3/5, Westinghouse DS 416 circuit breakers are used on the 480V power centers. Thes", however, are solid state and nc t subject to the problem described in the bulletin.
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Mr. R. H. Engelken Page Two Should you have any questions with regard ta this response, please contact me.
Very truly yours, 5 09.AL Axp D. L. RE'IBERGER Assistant Director - Technology DLR :FJ:ds s
8-32 183-