ML20080B095

First Interim Rept Re Significant Const Deficiency 97 Concerning Diesel Generator B Turbocharger Failure.Initially Reported on 831222.Cooper Energy Svcs Preparing Rept Re Cause of Failure.Final Rept Will Be Submitted by 840302

ML20080B095
Person / Time
Site:	Waterford
Issue date:	01/24/1984
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
97, W3K84-0154, W3K84-154, NUDOCS 8402060468
Download: ML20080B095 (3)

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) x LOUISIANA 24a octAnoNoe sma POWER & LIGHT P O BOX 6008 NEW ORLEANS. LOUISIANA 70174 * [504) 366-2315 t#Fu%!!?s2 January 24, 1964 W3K84- 0154 Q-3-A35.07.97

)7 -$ @ $ 0 M _L2 ,o:b Mr. John T. Collins 'j4g 'g g IgS4 Regional Administrator, Region IV {;

U. S. Nuclear Regulatory Commission J(\j ljlu /

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611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 - I

REFERENCE:

a) Telecon C. N. Hooper (LP&L) and J. Boardman (NRC IV) on December 22, 1983 b) Tclecon C. N. Hooper (LP&L) and W. Crossman (NRC IV) on January 4, 1984

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 97

" Diesel Generator "B" Turbocharger Failure" First Interim Report In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Interim Report of Significant Construction Deficiency No.

97, " Diesel Generator "B" Turbocharger Failure."

This item was previously identified as PRD No. 140.

Very truly yours,

&W V. V, '

T. F. Gerrets Quality Assurance Manager TFG:CNd:VBR Attachment cc: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 (15 copies) 8402060460 840124 PDR ADOCK 05000392 -

S PDR 1 k'1)lj l

r Mr. John T. Collins January 24, 1984 W3K84-0154 Page 2 cc: Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C. 20555 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

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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 97

" DIESEL GENERATOR "B" TURBOCHARGER FAILURE" Introduction

-This report is submitted p'ursuant to 10CFR50.55(e). It describes failures of components of emergency Diesel Generator "B",'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 of Problem During preoperational testing of Diesel Generator"B", an unplanned actuation

< of the overspeed trip was experienced. Troubleshooting traced the cause to a missing jumper wire in the governor-controls and an improper time delay in the generator field flashing circuit. During 110% load testing the turbo charger thrust bearing failed. The bearing was replaced and the test rerun. Nineteen hours into the 100% load test the engine was shut down due to high lube oil pump outlet pressure. At that time it was discovered that the oil pump had failed and that three cylinders were scored.

Safety Implications Failure of the diesel generators during a loss cf offsite power would render inoperative safety-related equipment required for accident mitigation, if left uncorrected.

Corrective Action Representatives of Cooper Energy Services, the diesel generator manufacturer, have inspected the damaged components and have reviewed the operator logs.

Based on this information they are preparing a report on the cause of the failure. Repair of the damage is ongoing. A final report will be issued by March 2, 1984, to explain the cause of the problem and identify the final corrective action.