ML20084K999

Final Significant Const Deficiency Rept 96 Re Failure of Chemical & Vol Control Sys Pump Train a to Start on Safety Injection Actuation Signal.Initially Reported on 840330. Defected Relays Replaced

ML20084K999
Person / Time
Site:	Waterford
Issue date:	04/30/1984
From:	Gerrets T LOUISIANA POWER & LIGHT CO.
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
96, W3K84-0985, W3K84-985, NUDOCS 8405140295
Download: ML20084K999 (3)

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I OUISIANA i42 OetAnONOe stater POWER & L1GHT P O. BOX 6008

• NEW ORLEANS. LOUISIANA 70174 = (504) 366-2345

$uS$ 5YS April 30, 1984 W3K84-0985 Q-3-A35.07.96 Mr. John T. Collins HON %  !

Regional Administrator, Region IV l.{fy _ 7 U. S. N.aclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000  ; y Arlington, Texas 76012 u

REFERENCE:

LP&L letter W3K84-0776 dated March 30, 1984, telecon W. Baldwin (LP&L) and W. Crossman dated April 19, 1984

SUBJECT:

Waterford SES Unit No. 3 Docket No. 50-382 Significant Construction Deficiency No. 96

" Failure of CVCS Pumps Train "A" to Start on a SIAS" Final Report In accordance with the requirements of 10CFR50.55(e), we are hereby providing two copies of the Final Report of Significant Construction Deficiency No. 96,

" Failure of CVCS Pump Train "A" to Start on SIAS".

If you have any questions, please advise.

Very truly yours, W fM&

T. F. Gerrets Corporate Quality Assurance Manager TFG:CNH:VBR Attachment ec: Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 (15 copies) 8405140295 840430 PDR ADOCK 05000 8 5 /

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o Mr. John T. Collins April 30, 1984 W3K84-0985 Page-2 cc: Director

0ffice of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr.-E.LL. 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 Koclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 .

i Mr. W. A. Cross 7910 Woodmont Avenue Suite 1200 Bethesda, Maryland 20814 P

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-FINAL 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 failura of CVCS pump train "A" to start on a SIAS. This problem is considered reportable l 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. Upon investigation, it was found that a latching relay '

malfunction (Electroswitch make) in the control circuit caused this problem.

Further investigation revealed failures of Electroswitch latching relays in l other safety related_ systems. ,

SAFETY IMPLICATIONS ,

1 Failure of Electroswitch latching relays could render systems necessary for safe shutdown and accident mitigation inoperative. 7

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CORRECTIVE ACTION .

I Two of the failed relays were sent to Electroswitch for evaluation. They were l thoroughly examined,-the burned out operating coils were replaced and they were subjected to an endurance test of 1000 cycles each. Electroswitch was-unable to find any defects which would have resulted in relay failure. j The following measures were taken to assure the reliable operation of systems utilizing Electroswitch latching relays.

(1) All relays were subjected to Prerequisite and Preoperational functional [

teste. This assures proper installation and wiring of each relay.  ;

(2) Plant Operating Procedure OP 904-009 has been written to require testing  ;

of all Electroswitch latching relays during modes 5 and 6, except relay l 52X/1005, which is inspected only.

Surveillance testing of all relays will be performed monthly in modes 1-4 except for FW1V and MS1V. ,

This report is submitted as a Final Report. ,

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