ML20104B147

Final Deficiency Rept Re Insp of Structural Steel Welds. Initially Reported on 840918.Structural Concerns Identified & Corrective Action Repts Issued to Have Shims Less than 1/4 Inch Thick Placed Flush W/Mounting Frame

ML20104B147
Person / Time
Site:	Wolf Creek
Issue date:	01/18/1985
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Denise R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
KMLNRC-85-025, KMLNRC-85-25, NUDOCS 8502010698
Download: ML20104B147 (2)

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KANSAS GAS AND ELECTRIC COMPANY THE ELECTRC COMPANY

.6:== c nossrna January 18, 1985 i v.ca pass oemt. nucts.n l

Mr. R.P. Denise, Director hhj[yg h Wolf Creek Task Force , 7 U.S. Nualear Regulatory Commission Regior. IV #2 5W 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011

'" I KMLNRC 85-025 Re: Docket No. STN 50-482 Ref: 1) Interim Report KMLNRC 84-187, dated 10/17/84 From GLKoester, KG&E, to DRHunter, NRC

2) Letter KMLNRC 84-238, dated 12/31/84 From GLKoester, KG&E, to RCDeYoung, NRC Subj: Final 10CFR50.55(e) Report - Inspection of Welds

Dear Mr. Denise:

This letter provides the final report submitted pursuant to 10CFR50.55(e) concerning inspections of structrual steel welding at Wolf Creek Generating Station. This matter was initially reported by Kansas Gas and Electric Company (KG&F) on September 18, 1984, and supplemental information was provided in Reference 1.

Reference 2 provided a comprehensive report which described the corrective actions taken by KG&E to resolve this matter. As stated in the report KG&E Corrective Action Request #19 was the corrective action vehicle initiated to assure resolution of the concern and Corrective Action Request #19 has now been closed.

The report transmitted in Reference 2 also documented that part of the corrective actions associated with CAR #19 included a review of other AWS Welding to determine whether any similar concerns could exist in areas other than structural steel. Only one other area was identified in which additional investigation was required. This was in the area of electrical equipment installation where the method of permanent installation is by welding the equipment mounting frame to the foundations embeds. Daniel Corrective Action Report 1-EW-0046 was initiated to document and track the resolution of this concern.

The specific concern associated with CAR 1-EW-0046 is that not all shims less than 1/4 inch thick were flush with the mounting frame as required by the AWS code. The code requires that shim less than 1/4 inch thick be flush with the frame and the size of the weld increased by the thickness of the shim. Some equipment mounting frames were identified in which the shim was not flush. This resulted in a situation where the shim carried the shear load. A walkdown was performed to identify and document these nonconformances. The rework associated with CAR 1-EW-0046 is in progress and scheduled for completion prior to fuel load.

8502010698 850118 PDR ADOCK 05000482 1 { -G gg S _ _____ _ PDR- - .Jdress: Ro. Box 20e I wscNta. Kansas 67201 - Telephone: Area Code (316) 261-6451

t KMLNRC 85-25~

Page 2 Please contact me or Mr. Otto Maynard of my stcff if you have any questions concerning this subject.

Yours very truly, f)

Glenn L. Koester Vice President - Nuclear GLK: dab xo: P0'Connor HBundy RCDeYoung WGuldemond l

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