ML20085L160

First Interim Significant Const Deficiency Rept 89 Re GE AK50/AK30 Switchgear Breakers Cam Shaft Bearing Retaining Ring.Interim Corrective Action Taken to Prevent Bearing Movement Until Repair Developed by Ge.Next Rept by 840120

ML20085L160
Person / Time
Site:	Waterford
Issue date:	10/07/1983
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, 89, W3K83-1510, NUDOCS 8310210290
Download: ML20085L160 (3)

Text

. .. .. .

T l

LOUISIANA P O W E R & L1G H T /Waterford 3/P. O. Box B/Killona, Louisiana 70066 i

l MIDDLE SOUTH UTIUTIES SYSTEM October 7, 1983 l

W3K83-1510 Q-3-A35.07.89 Mr. John T. Collins IN5 L/)'lt$ ESIN[IYb b b Regional Administrator, Region IV  :

OCT I 71983 U. S. Nuclear Regulatory Commission f lg 611 Ryan Plaza Drive, Suite 1000 Li Arlington, Texas 76012 a&dsUeAsW-

REFERENCE:

Telecon between C. N. Hooper (LP&L) and C. Oberg (NRC) on September 9, 1983

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 89 "GE AK50/AK30 Switchgear Breakers Cam Shaft Bearing Retaining Ring" First Interim Report In accordance with 10CFR50.55(e), attached are two copies of the interim response to Significant Construction Deficiency No. 89, "GE AK50/AK30 Switchgear Breakers Cam Shift Bearing Retaining Ring". This item was previously identified as PRD No. 125.

Very truly yours, T. F. Gerrets k

Quality Assurance Manager TFG:ChT:VBR cc: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 (15 copies)

Director Office of Management l Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C. 20555 8310210290 031007 PDR ADOCK 05000302 S ppg N"N g

F '7

.I Mr. John T. Collins October 7, 1983 W3K83-1510 Page 2 cc: Mr. E. L. Blake Shaw, Pittman, Potts, & Trowbridge 1800 M Street, N.W.-

Washington, D.C. 20036 Mr. W. M. Stevenson Monroe & Lemann 1424 Whitney Building New Orleans, Louisiana 70130 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339

c, 4

IliTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 89 "GE AK50/AK30 SWITCHGEAR BREAKERS CAM SHAFT BEARING RETAINING RING" INTRODUCTION This report is submitted pursuant to 10CFR50.55(e). It describes a deficiency in the 480 volt switchgear breakers supplied by General Electric. This problem is considered reportable under the requirements of 10CFR50.55(e).

To the best of our knowledge, this problem has not been identified to the USNRC pursuant to 10CFR21.

DESCRIPTION During routine operation of a safety-related 480 volt switchgear breaker it failed to close when required. The problem was traced to bearings in the closing spring cam shaft which slid out of the breaker housing and caused shaft misalignment. The misaligned shaft placed the closing spring in a position which prevented it from pulling the breaker closed. Subsequent.

inspection revealed other breakers with the same deficiency.

SAFETY IMPLICATIONS Failure of 480 volt breakers to .close will prevent operation of safety related equipment required for safe shutdown of the giant.

CORRECTIVE ACTION Nonconformance Report No. W3-6766 was initiated to track and document this deficiency. Interim corrective action has been taken to prevent bearing movement until a permanent repair is developed by GE. Final corrective action is expected by December 30, 1983.

An update or final report will be submitted on January 20, 1983.