ML20093N642

Final Deficiency Rept Re Wrapping Not Removed During Mfg of Vulkene Supreme Cable Terminations.Initially Reported on 830620.Cable Replaced W/Acceptable Replacement Cable That Does Not Have tight,nearly-invisible Wrapping

ML20093N642
Person / Time
Site:	Wolf Creek
Issue date:	10/17/1984
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Hunter D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
KMLNRC-84-185, NUDOCS 8411050280
Download: ML20093N642 (2)

Text

O, e KANSAS GAS AND ELECTRIC COMPANY T>E ELECTAC LOMPANY GLENN L tEOESTER UCE Pef 00ENT NUCLE AR Oc tober 17, 1984 Mr. D.R. !!unter, Chief Reactor Project Branch 2 U.S. Nuclear Regulatory Commission g) gwwg tsg qJ c to s Region IV )

611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 m22m

- N KMLNRC 84-185 Re: Docket No. STN 50-482 Ref: 1) Interim Report KMLNRC 83-095 dated 7/20/83 from GLKoester, KG&E, to WCSeidle, NRC

2) Interim Report KMLNRC 83-125 dated 9/28/83 from GLKoester, KG&E, to WCSeidle, NRC

3) Interim Report KMLNRC 83-151, dated 11/23/83 from GLKoester, KG&E, to JEGagliardo, NRC Subj: Final 10CFR50.55(e) Report - Vulkene Supreme Cable Tarminations

Dear Mr. IIunter:

This letter provides the final report submitted pursuant to 10CFR50.55(e) concerning Vulkene Supreme Cable terminations at the Wolf Creek Generating Station (WCGS) . This matter was initially reported by Kansas Gas and Electric Company (KG&E) on June 20, 1983, and additional information was provided in the References. Any changes in status subsequent to Reference

3) were reported in monthly updates to Region IV.

As documented in Reference 1) , the concern reported was that the tight, nearly-invisible wrapping on Vulkene Supreme Cable was not adequately removed in all instances when making cable terminations in the field. Consequently, some equipment was not passing initial continuity, megger, or operational checks. The majority of the Constructor-installed Vulkene cable had been installed as a result of a required field change.

Investigation of this concern determined that there was nothing urong with the cable itself. The deficient terminations were the result of inadequate removal of the nearly-invisible wrapping. This urapping was not being removed by the stripping tool and since it was nearly invisible, some of the terminations were made with some of the wrapping still on the conductor.

Therefore, the wrapping acted as an insulator between the conductor and lug.

Although continuity, megger, and/or preoperational checks would identify deficient connections, KG&E elected to have the Constructor-installed Vulkene 8411050280 841017 PDR ADOCK 05000482 S PDR

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Mr. D.R. Hunter

,KMLNRC 84-185 October 17, 1985 Supreme Cable replaced with an acceptable replacement cable that does not have the tight, nearly-invisible wrapping. This would minimize the potential for similar problems in the future if rework needed to be rarformed on those cable terminations.

The cable replacement described above has now been completed. Please contact me or Mr. Otto Maynard of my staff if you have any questions concerning this subject. '

Yours very tuly, f Glenn L. Koester Vice President - Nuclear GLK:bb xc:RCDeYoung PO'Connor (2)

!!Bundy

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