ML20004F008

Deficiency Rept,Originally Reported by Telcon on 810522,re Separation of Blade from Cooling Fan.Caused by Fatigue Crack in Casting Flaw at Stressed Surface of Blade.Condition Under Review

ML20004F008
Person / Time
Site:	San Onofre
Issue date:	05/26/1981
From:	Nunn D SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8106160379
Download: ML20004F008 (1)

Text

90 9 Southern California Edison Company

_c;;3 P O O Cs X 8 00 22 44 W ALN UT GROVE AVENU E ROSEME AD. CALIFORNI A 91770 D. E. N U N N gaggemong asanaes s. ovaug, assumance gain,,,.ases May 26, 1981 c3, M TAM Mr. R. H. Engelken, Director 1

Office of Inspection and Enforcement x

U. S. Nuclear Regulatory Commission

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N Region V

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h Suite 202, Walnut Creek Plaza t

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1990 North California Boulevard JUll 151981

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Walnut Creek, California 94506 u.s m m,

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Dear Mr. Engelken:

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Subj ect:

Docket Nos. 50-361 and 50-362

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San Onofre Nuclear Generating Station, Units 2'an This letter confirms verbal notification on May 22, 1981 of a condition discovered in construction which is con-sidered potentially reportable in accordance with 10CFR50.55(e).

The condition concerns the separation of a blade from a CEDM cooling fan which was due to a fatigue crack in the area of a casting flaw at the stressed surface of the blade.

We are performing an evaluation of this condition and will submit an appropriate report in accordance with 10CFR50.55-(e)(3) if the condition is determined to be reportable.

If you have any questions or require additional information, please let me know.

Very truly yours,

~

4 AN R. J. Pate (NRC, San Onofre Units 2 and 3) gv$0 cc:

i Dr. L. T. Papay t110616 8 3 7 9

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