ML20080A584

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Submits Info Re Addl Minor Revs to Plans & Procedures During Steam Generator Replacement,Per .Single Pipe Cut Procedure Used on Hot Leg & Cold Leg Reactor Coolant Piping
ML20080A584
Person / Time
Site: Point Beach NextEra Energy icon.png
Issue date: 01/27/1984
From: Fay C
WISCONSIN ELECTRIC POWER CO.
To: Harold Denton, John Miller
Office of Nuclear Reactor Regulation
References
NUDOCS 8402060137
Download: ML20080A584 (2)


Text

A W.consin Electnc powca couessr 131 W. MICHIGAN, P.O. BOX 2046, MILWAUKEE, WI 53201 January 27, 1984 Mr. H. R. Denton, Director Office of Nuclear Reactor Regulation U. S. NUCLEAR REGULATORY COMMISSION Washington, D. C. 20555 Attention: Mr. J. R. Miller, Chief Operating Reactors, Branch 3 Gentlemen:

DOCKET NO. 50-266 STEAM GENERATOR REPLACEMENT POINT BEACH NUCLEAR PLANT, UNIT 1 This letter provides information regarding minor revisions which have been made to the plans and procedures to be used during the Point Beach Nuclear Plant Unit 1 steam generator replacement, in addition to the revisions documented by our September 9, 1983 letter. Mr. T. G. Colburn of your staff has asked that we advise you of minor changes to the plans outlined in the Steam Generator Repair Report (Repair Report), Revision 1, dated March 1983. In all cases, the changes are bounded by the commitments of the Repair Report, NRC Safety Evaluation Report, and Environmental Impact Statement.

A single pipe cut procedure, rather than the double cut procedure as described in Section 3.2.6.5 of the Repair Report, was used on the hot leg and cold leg reactor coolant piping. Rigid templates of the replacement steam generator reactor coolant nozzles were used to verify that the fitup of the existing reactor coolant I piping would be less than the maximum mismatch allowed by ASME Code Section III, NB 42.32.

l A change to the procedure outlined in Section 3.1.4.1 l of the Repair Report was made to allow the use of the existing polar crane trolley to lift the steam drum section of each steam generator.

The estimated weight of each steam drum and rigging is 105 tons.
While the polar crane is rated at 100 tons without the temporary l center support column, the crane specification allows two lifts per l year of 125 tons and a one-time lift of 150 tons for special heavy l lifts during construction or major repairs. The special heavy lift 8402060137 840127 ff C(2 [

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o-Mr. H. R. Denton January 27, 1984 was done in accordance with the requirements specified in ANSI B30.2.0-1976. The crane manufacturer participated in the review of the procedures, rigging method, and the pre-lift and post-lift inspections. A temporary 250-ton construction crane was used to lift the steam generator lower assemblies.

A change to the procedure outlined in Section 3.2.6.2(7) of the Repair Report eliminated post weld stress relief heat treat-ment on welds performed on existing main steam and feedwater piping since post weld stress relief heat treatment is not required by ASME Code Section III for piping of wall thicknesses similar to the main steam and feedwater piping.

Should you have any questions regarding the information provided in this letter, please contact us. We will keep you informed of any other revisions to our original plans and procedures.

Very truly yours,

[-

{ Ib' Vice President-Nuclear Power

C. W. Fay Copy to NRC Resident Inspector l

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