ML20079L987

Special Rept 91-004:all Inconel 600 Mechanical Tube Plugs in Steam Generators a & C Removed During Fourth Steam Generator Inservice Insp from 911016-24.Tubes Replugged W/Inconel 690 Except for Tubes R28C56 & R28C76 in Steam Generator C

ML20079L987
Person / Time
Site:	Wolf Creek
Issue date:	11/01/1991
From:	Bailey J WOLF CREEK NUCLEAR OPERATING CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
91-004, 91-4, NUDOCS 9111070221
Download: ML20079L987 (1)

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W@ NUCLEAR LFCREEK OPERATING COR

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November 1.1991 John A Bailey vn. Pmsent NO 91 '1313 operations U. S. Nuclear Regulatory Commission ATTH: Document Control Desk Mail Station P1-137 Washington, D. C. 20555

Subject:

Docket No. 50 482: Special Report 91-004 - Steam Generator Tube Plugging Report Gentlemen The purpose of this letter is to provide information regarding the number of tubes plugged in each steam generator as required by Wolf Creek Generation Station Technical Specifications (T/S). Technical Specificatirm 4.4. L 5 states:

'Within 15 days tollowing the completion of each inservice inspection of steam generator tubes, the number of tubes plugged in each steam generator shall be reported to the conunission. . . '

The fourth steam generator (S/G) inservice inspection, which began October 16, 1991, was completed for S/G's 'A' and 'C' on October 24, 1991. This inservice inspection includeci removal of al.' Inconel 600 mechanical tube plugs in both S/G's "A" and 'C'. These tubes were replugged with Inconel 690 mechanical tube plugs with the exception of tubes R28C56 and R2BC76 in S/G "C', Eddy current testing of these two tubes determined them to be acceptable for return to service.

Two tubes in S/G 'C' were mechanically plugged because of Anti-Vibration Bar wear. Theoe two tubes are R49086 and R49C88. The complete results of the steam generator inservice inspection shall be reported to the Commission in a special report as required by T/L 4.4.5.5 by October 23, 1992.

If you have any comments concerning this matter, please contact me or Mr. T. E. Cribbe of my staff.

Very truly yours, "D = (A John A. Bailey Vice President ]

Operations JABlaem cci b. b. Gundrum (NRC)

A. T. Howell (NRC)

R. D. Martin (NRC) '

W. D. Reckley (NRC) r/1 1 107 N ."' I '11161 /./ \ 0 PDR ADOC6 c0000 y 80. Don 411 i Durtington, KS 6f409 : Phone (316 3ti4 8331 [ j m

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