ML19269D516

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Responds to NRC 790220 Ltr Re Violation Noted in IE Insp Rept 50-322/79-02.Corrective Actions:Records of All Welds Previously Heat Treated Have Been Reviewed & Engineering Evaluation Initiated Where Rates Have Been Exceeded
ML19269D516
Person / Time
Site: Shoreham File:Long Island Lighting Company icon.png
Issue date: 03/23/1979
From: Wofford A
LONG ISLAND LIGHTING CO.
To: Robert Carlson
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19269D508 List:
References
SNRC-370, NUDOCS 7906040176
Download: ML19269D516 (2)


Text

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, 175 EAST OLDCOUNTRY ROAD . H I C K S V I L L E, NEW YORK 11801 ANCREW W. WOFFORD vect passiosm?

March 23, 1979 Mr. Robert F. Carlson, Chief Reactor Construction & Engineering Support Branch U. S. Nuclear Regulatory Commission, Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 NRC Inspection No. 79-02 Shoreham Nuclear Power Station - Unit No. 1 Docket No. 50-322

Dear Mr. Carlson:

This letter respont. to your letter of February 20, 1979, which forwarded the report of the inspection of activities author-ized by NRC License No. CPPR-95, conducted by Mr. Toth of your office on January 22-26, 1979. The letter stated that it appeared that one of our activities was not conducted in full compliance with NRC requirements. The apparent noncompliance and our response follow:

1. Apparent Noncompliance with 10CFR50, Appendix B Criterion IX, and FSAR, Paragraph 17.1.9A Contrary to the above, on or about November 11, 1978 weld joint 1B21-IC175-FW6 was heated, for post weld heat treatment, at a rate exceeding the ASME III Code allowable. Specifically, the joint 0

was heated between 640 F and 9300F at a rate of 2900 F/hr while the maximum allowable rate was 2250/hr.

Corrective Action and Results Records of all welds previously heat treated in accordance with Procedure NW 100, Appendix D, have been reviewed. Those welds where the maximum allowable heating or cooling rates may have been exceeded have been identified, and an engineering evaluation has been initiated. Final corrective action will be defined upon com-pletion of this evaluation.

2260 081 7906040/764 >

sL.AND,UGHTING COMPANY Mr. Robert F. Carlson, Chief -

2- March 23, 1979 Steps Taken to Prevent Recurrence An Engineering and Design Coordination Report has been issued clarifying instructions pertaining to material thicknesses to be used in calculating maximum heating and cooling rates during post weld heat treatment of welds joining components of unequal thicknesses. Procedure NW 100, Appendix D, has been revised to reflect these instructions and to incorporate the provisions of the ASME Boiler and Pressure Vessel Code,Section III, 1974 Edition, Summer 1975 Addenda, and paragraph NW-4620 of the 1974 Edition.

Date Full Comoliance Will Be Achieved Preventive action has been taken. The date when full compliance will be achieved will be determined following definition of final correc.tive action as noted above.

Very truly yours,

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A. W. Wofford-Vice President 2260 082