ML20024D037

Confirms 830711 Telcon Re Abnormal Degradation in Rcpb. Specific Course of Action to Evaluate & Correct Circumferential through-wall Leaks Near Welds CSA-BJ-5 & CSA-BJ-6 Being Formulated

ML20024D037
Person / Time
Site:	Cooper
Issue date:	07/11/1983
From:	Thomason P NEBRASKA PUBLIC POWER DISTRICT
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
CNSS837203, NUDOCS 8308030047
Download: ML20024D037 (2)

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Mr. John T. Collins, Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, TX 76011

Dear Sir:

In accordance with Section 6.7.2.A of the Technical Specifications for Cooper Nuclear Station, this letter confirms today's telephone conversation with your Mr. D. M. Hunnicutt concerning an abnormal degradation in the reactor coolant pressure boundary. On July 10, 1983, during removal of weld crowns by grind-ing to allow for UI inspection for IGSCC on the ten inch Core Spray Loop A, two circumferential thru-wall leaks were visually discovered in, or near, welds CSA-BJ-5 and CSA-BJ-6. A specific course of action for evaluating and correcting this situation is presently being formulated. A written follow-up report will be submitted within two weeks and will provide a complete explana-tion of the circumstances surrounding the event.

Sincerely, h P. V. Thomason U Acting Station Superintendent Cooper Nuclear Station PVT:EMM:lb 8308030047 830711 PDR ADOCK 05000298 P PDR y  !

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