ML20151U398

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Forwards Byron Unit 1 Inservice Insp & Testing Program Plan,First Insp Interval
ML20151U398
Person / Time
Site: Byron Constellation icon.png
Issue date: 02/06/1986
From: Ainger K
COMMONWEALTH EDISON CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
Shared Package
ML20151U402 List:
References
1269K, NUDOCS 8602110009
Download: ML20151U398 (2)


Text

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.)"i CN Commonwealth Edison

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) One Fir;t NationIl Piari Chicigo. Ilknois 7 Address Reply to: Post Off ce Box 767

\ / . Chicago Illinois 60690 February 6, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor. Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Byron Station Unit 1 Inservice Inspection Program NRC Docket No. 50-454

Dear Mr. Denton:

Enclosed is the Byron Unit 1 Inservice Inspection (ISI) and Testing Program Plan for the first 120-month inspection interval. This ISI program plan has been developed in accordance with the requirements of 10 CFR 50.55a and the ASME Code Section XI 1980 Edition with Addenda through Winter 1981 Addenda. Relief requests are provided which identify specific inspection requirements determined to be impractical. In addition to the 10 CFR 50.55a and ASME Code requirements, the program plan includes the augmented inspection requirements imposed by the NRC. Augmented inspections are necessary for high energy lines, reactor coolant pump flywheels, steam generator tubing and turbine rotors.

The program plan is divided into six sections as identified below.

Section 1.0 - Program Plan Introduction, Revision 1 Section 2.0 - Program Plan for Nondestructive Examinations, Revision 1 Section 3.0 - Program Plan for Pumps, Revision 4

, Section 4.0 - Program Plan for Valves, Revision 5 Section 5.0 - Program Plan for Component Supports, Revision 2 Section 6.0 - Program Plan for Snubbers, Revision 3 This program plan supercedes the previous ISI program plans for Byron Unit 1 pumps, valves, and snubbers.

Relief requests NR-4, NR-5, NR-6 and NR-7 have been omitted from Section 2.0 of the ISI program plan. These relief requests address the volumetric examinations of various cast stainless steel welds in the reactor coolant loops. The Conunonwealth Edison System Materials Analysis Department (SMAD) is currently developing an ultrasonic examination procedure for these I

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J. G. Keppler February 6,1986 welds. The results of this effort will determine' the extent of Code relief necessary. A description of SMAD's activities regarding examination of cast stainless steel will be provided to the NRC by February 28, 1986. The relief requests regarding cast stainless steel components will be finalized and submitted to the NRC after SMAD's activities are complete.

One signed original and fifteen copies of this letter are provided for NRC review. Two copies of the program plan are being provided.

Please direct any further questions regarding this matter to this office.

Very truly yours, K. A. Ainger Nuclear Licensing Administrator im Enclosure cc: Byron Resident Inspector (letter _only) l l 1269K i

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