ML19249B352

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Responds to IE Bulletin 79-11 Re Faulty Overcurrent Trip Device in Circuit Breakers for Engineered Safety Sys. No Westinghouse Type DB-50 & DB-75 Circuit Breakers Are in Use
ML19249B352
Person / Time
Site: San Onofre  Southern California Edison icon.png
Issue date: 06/29/1979
From: Baskin K
SOUTHERN CALIFORNIA EDISON CO.
To: Engelken R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
NUDOCS 7909040317
Download: ML19249B352 (1)


Text

Tt G Southern California Edison Company P O f) U m 830 2 2 4 4 W A L N U T U ft ri v E A V l t. U L H O S [ p.1 L A D C A L l } O ri N I A 's 1/ / 0 pp -

K.P.BASKlH

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.... . . . . . . . . . . June 29,1979 U. S. Nuclear Regulatory Commission Region V Suite 202, Walnut Creek Plaza 1990 N. Californii. Boulevard Walnut Creek, California 95696 Attention: Mr. R. 11 . Engelken G e n t le:r.e n :

Subject:

IE Bulletin 79-11 Docket Mos. 50-361 and 50-362 San Onof re Nuclear Generating Station Units 2 and 3 Your letter of May 22, 1979 forwards IE Bulletin 79-11, " Faulty Overcurrent Trip Device in Circuit Breakers for Engineered Safety Systems" and requests information concerning the extent of use of certain circuit breakers at San Onofre Units 2 and 3.

It has bean determined that none of the subject circuit breakers (Westinghouse Model DB-50 and DB-75) are in use, planned for use, or in spares at San Onofre Units 2 and 3. Add i ti ona l ly , our A/E has been instructed to ensure the subject breakers are not purchased in the future.

Should you have any questions or require further clarification, please contact me.

Very truly yours, l9 '

cc: U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Operations Inspection Washington, D.C. 20555

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