NRC Generic Letter 83-15, Implement. of Reg. Guide 1.150, "Ultrasonic Testing of RX Vessel Welds During Preservice & Inservice Examinations, REV.1

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WASHINGTON, D. C. 20555

March 23, 1983

TO ALL LICENSEES OF OPERATING POWER REACTORS AND APPLICANTS FOR OPERATING LICENSES (GENERIC LETTER 83-15)

SUBJECT: IMPLEMENTATION OF REGULATORY GUIDE 1.150, "ULTRASONIC TESTING OF REACTOR VESSEL WELDS DURING PRESERVICE AND INSERVICE EXAMINATIONS, REVISION 1

The original version of Regulatory Guide 1.150, "Ultrasonic Testing of Reactor Vessel Welds During Preservice and Inservice Examinations," dated June 1981, was reviewed by the Ad Hoc Committee of the Electric Utility Industry. The Committee's review resulted in their recommending an alternative method, which was presented in "Final Report - Recommended Changes to Regulatory Guide 1.150," August 1982.

The NRC staff has evaluated the recommended alternative method in the report and finds it an acceptable alternative. Therefore, this alternative method has been added to the regulatory positions in Regulatory Guide 1.150, and this Revision 1 is being issued as an active guide without prior issuance as a draft guide for comment.

Except in those cases in which an applicant or licensee proposes an acceptable alternative method for complying with specified portions of the Commission's regulations, the method described in Revision 1 of the subject Guide will be used in the evaluation of

(1) the results of inservice examination programs of all operating reactors after July 15, 1981, and
(2) the results of preservice examination program of all reactors under construction performed after January 15, 1982. The recommendations of this guide are not intended to apply to preservice examinations that have already been completed. We recommend that all licensees modify their technical specifications if appropriate, to make them consistent with the recommendations in the subject Guide.

Any guidance in the subject Guide related to information collection activities has been cleared under OMB Clearance No. 3150-0011, which expires April 30, 1985.

Sincerely,

Darrell G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation

830304008