ML20052E843

Final Deficiency Rept Re Broken Springs Found in Ite/Gould Motor Control Ctrs,Initially Reported 820304.Study Showed Springs Not Necessary & Were Removed from All Motor Control Ctrs.Condition Found Not Reportable Under 10CFR50.55(e)

ML20052E843
Person / Time
Site:	Wolf Creek
Issue date:	05/04/1982
From:	Koester G KANSAS GAS & ELECTRIC CO.
To:	Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, KMLNRC-82-195, NUDOCS 8205110476
Download: ML20052E843 (2)

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/ _ -May 4, 1982 Mr. W.C. Seidle, Chief Reactor projects Branch 2 U.S. Nuclear Regulatory Commission

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Region IV ',s .

611 Ryan plaza Drive, Suite 1000 Arlington, Texas 76011 MAY 6 E  ?

KMLNRC 82-195 Re: Docket No. STN 50-482 Re f: Interim Report KMLNRC 82-185 dated 3/31/82 from GLKoester, KG&E, to WCSeidle, NRC Subj: Final 10CFR50.55(e) Report - Broken Springs on Stab Connectors

Dear Mr. Seidle:

This letter is a final report on the broken springs found in the ITE/Gould 480V motor control centers (MCC). This item was first reported to NkC Region IV as a potential 10CFR50.55(e) on March 4,1982, and the Reference provided an interim report on this matter.

The purpose of the spring in question, as stated by the manufacturer, was l

to satisfy earlier design requirements for alignment of the stab onto the l vertical bus. With the MCC's supplied for Wolf Creek, these springs are not necessary because a continuous barrier provides the necessary guidance.

The Architect / Engineer, based on vendor recommendations, supplied four possible solutions to resolve the breakage of the springs, IIeat rise, j

seismic, and lifetime considerations were evaluated and supported the con-l clusion that the springs were not necessary in the Wolf Creek MCC's. There-fore, the springs in question were removed from all MCC's.

It was further determined that the broken spring pieces could not have caused phase-to-phase or phase-to-ground faults.

All evaluations of this matter indicate that no significant defects or deficiencies existed which would have adversely affected the safety of the plant. Therefore, we have concluded that this matter is not reportable l under 10CFR50.55(e) . Documentation of the evaluation of this matter is l available for your review.

N 8205110476 820504 gDRADOCK05000 f 201 N. Market ~ Wochsta. Kansas - Mail Address: PO. Box 208 I tbchita, Kansas 67201 - Telephone: Area Code (316) 261-6451

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Mr. W.C. Seidle KMLNRC 82-195 May 4, 1982 If you require any additional information on this matter, please contact me or Mr. Otto Maynard of my staff.

Yours very truly, Glenn L. Koester Vice President - Nuclear

$lh GLK:bb cc: Mr. Thomas vandel Resident NRC Inspector P.O. Box 311 Burlington, Kansas 66839