ML20079H878

First Interim Rept Re Significant Const Deficiency 96, Failure of Chemical & Vol Control Sys Pump Train a to Start on Safety Injection Actuation Signal. Relays Returned to Electro Switch Co.Next Rept by 840302

ML20079H878
Person / Time
Site:	Waterford
Issue date:	01/11/1984
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
W3K84-0061, W3K84-61, NUDOCS 8401240094
Download: ML20079H878 (3)

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LOUISIANA f 242 ouanonoE srnar POWER & LIGHT / P O E~)X 6008 . NEW ORLEANS LOUISIANA 70174 . (504) 366-2345

$TESINiYS January 11, 1989 W3K84-0061 Q-3-A35.07.96 Mr. John T. Collins Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012

REFERENCE:

Telecon C. Hooper (LP&L) and D. Hunnicut (NRC IV) on December 7, 1983 =c-il 1, # '

Dear Mr. Collins. J'

SUBJECT:

Waterford SES Unit No. 3 ,

!Y Dochet No. 50-382 .~

Significant Construction Deficiency No. 96 ~'l

" Failure of CVCS Pump Train A to Start on a SIAS"  !

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. 96

" Failure of CVCS Pump Train A to Start on SIAS". This item was previously identified as PRD No. 133.

Very truly yours, ys W. Y T. F. Gerrets 3

Quality Assurance Manager TFC:CNH:

cc: Director Office of Inspection & Enforcement U. S. Nuclear Re3ulatory Commission Washington, D.C. 20555 (15 copies)

Director Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C. 20555 8401240094 840111 4 PDR ADOCK 05000382 S PM dl-Q9

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Mr. J. T. Collins January 11, 1984 W3K84-0061 Page 2 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 i

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INTERIM REPORT OF SIGNIFICANT CONSTRUCTION DEFICIENCY NO. 96

" FAILURE OF CVCS PUMP " TRAIN A" TO START ON A SIAS" INTRODUCTION

. This report is submitted pursuant to 10CFR50.55(e). It describes a failure to CVCS pump train "A" to start on a SIAS. This problem is considered reportable under the requirements of 10CFR50.55(e).

To the best of our knowledge, this deficiency has not been reported to the USNRC pursuant to 10CFR21.'

DESCRIPTION During loss of offsite power testing, train "A" CVCS pump did not start on initiation of SIAS. Uponinvestigation,Oktwasfoundthatalatchingrelay malfunction (Electro Switch make) in the control circuit caused this problem]'

We have determined that the relay malfunction is because of excessive wear of

- components in the relay operating mecha' 'sm.

SAFETY IMPLICATIONS A single CVCS pump is taken credit for in certain small break LOCA analyses.

Failure of pump "A" to start as a result of the above explained relay malfunction would, therefore, violate single failure criteria, if left uncorrected.

CORRECTIVE ACTION

.Two relays which malfunctioned were sent to Electro Switch Company along with a request to evaluate all possible causes for the relay malfunction and provide a resolution in the form of permanent repair or redesign of the operating mechanism.

An Interim or Final Report will be submitted on or before March 2, 1984 I