ML20214K858

Interim Deficiency Rept,Item 231 Re Hylomar Thread Sealant Exceeding Acceptable Chloride Limits.Initially Reported on 860814.Addl Time Required to Complete Testing.Next Rept Delayed Until 861010

ML20214K858
Person / Time
Site:	Harris
Issue date:	09/29/1986
From:	Watson R CAROLINA POWER & LIGHT CO.
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
CON-NRC-484 231, HO-860353-(O), NUDOCS 8612020489
Download: ML20214K858 (2)

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SEP 3 3 535 HARRIS NUCLEAR PROJECT File Number: SHF/10-13510E Letter Number: HO-860353 (0)

Dr. J. Nelson Crace NRC-484 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)

Atlanta, Georgia 30323 CAROLINA POWER & LICHT COMPANY SHEARON HARRIS NUCLEAR PLANT 1986 - 900,000 KW - UNIT 1 HYLOMAR THREAD SEALANT ITEM 231

Dear Dr. Grace:

On August 14, 1986, CP&L notified the NRC (Mr. L. Mellen) of a potentially reportable item per the provisions of 10CFR50.55(e).

The NRC was informed that Hylomar Thread Sealant, which has been used in stainless steel applications, was found to exceed acceptable chloride limits.

On September 11, 1986, CP&L submitted a letter (NRC-479) to the NRC stating that testing to determine the effects of Hylomar Thread Sealant was underway at our Harris Energy & Environmental Center laboratories. The testing is required to properly evaluate the potential for stress cracking of stainless steel exposed to Hylomar Sealant due to its high concentration of chlorides. At that time, it was expected that the testing and evaluation of the results would be completed in order that a determination on reportability could be made by September 26, 1986.

The purpose of this update is to inform you that the required testing has not been completed at this time. Therefore, additional time will be required to complete our evaluation of this item. Upon completion of the testing and evaluation of the results, CP&L will be able to determine reportability on this item. It is currently projected that CP&L will report to the NRC on the reportability determination by October 10, 1986.

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Thank you for your consideration in this matter.

Yours very truly, .

R. A. Watson Vice President Harris Nuclear Project RAW /skm cc: Messers. C. Maxwell-(NRC-SHNPP)

'J. M.' Taylor (NRC)

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