ML20094N860

RO 269/83-20 Re Trip Shaft & Bearing Assembly Portions of CRD Breaker Front Frame Assemblies.Nine of 17 GE Frames Defective.Util Awaiting Schedule for Delivery of New Frames

ML20094N860
Person / Time
Site:	Oconee
Issue date:	07/27/1984
From:	Tucker H DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RO-269-83-20, NUDOCS 8408160417
Download: ML20094N860 (2)

Text

{ }

DUKE POWER GOMPANY P.O. DOX 33180 CHARLOTTE. N.O. 28242 HAL B. TUCKER TELEPHONE

,,,,""""j",, ,2 AOu'lyl2h,1984 * " " ' ,

Mr.' James P. O' Reilly U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Re: Oconee Nuclear Station Docket No. 50-269

Dear Mr. O'Reilly:

On January 11, 1984 Duke Power Company submitted for your information Reportable Occurrence Report R0-269/83-20 which concerned two control rod drive breakers experiencing a sluggish response while being tested.

In that submittal, Duke committed to advise the NRC of the final schedule for delivery and installation of new trip shaft and bearing assemblies which are part of the new Control Rod Drive (CRD) Breaker Front Frame Assemblies.

By my letter of April 30, 1984, the NRC was informed that based on advise from General Electric Company the CRD breaker front frame assemblies would be shipped on May 14, 1984 with the installation of the new front frames on all three Ocenee units completed by July 31, 1984.

During the process of installing the new front frames received from General . Electric, nine out of a shipment of seventeen were found to have manufacturing defects which precluded their acceptability for use. Members of your Staff as well as ONRR were informed of this problem on July 19, 1984 and July 26, 1984. Duke has evaluated the defects for potential reportability under 10CFR21. However, since the defects were discovered during the process of designating the front frame assemblies for use as a basic component, Part 21 report-ability did not apply. Duke will orovide a report which will address the defects discovered at a later date.

Duke continues to be committed to completing the installation of new front frames. However, the original completion date of July 31, 1984 will be delayed due to shipping delays incurred and to the defect discovered. Duke is currently waiting for advise from General Electric Company regarding a shipping schedule for the remaining assemblies.

Duke will submit a revised schedule for the delivery and installation of the remaining frames as soon as it is available.

WFICIAL COPY 8408160417 840727 PDR ADOCK 05000269 e -

w ,j ,

c

' ;c

-Mr.. James'P. O'Reilly ,

Page 2-  !

-July 27. 1984-

.Very truly yours, g k, -

r Hal B. Tucker.

MAH: sib cc: Document Control Desk

-U. S. Nuclear Regulatory Commission Washington, D. C. 20555 INPO Records Center Suite 1500 1100 circle 75 Parkway Atlanta, Georgia 30339 Mr. J. C. Bryant NRC Resident Inspector Oconee Nuclear Station Ms. Helen Nicolaras Office of Nuclear Reactor Regulation l U. S. Nuclear Regulatory Commission Washington, D. C. 20555 l

l l

i l

l I

. _ . - . _ _ _ . . ~ .

. . _ . . . .__ ,