GO2-82-676, Final Deficiency Rept Re Defect in 35-130-200 Battery Chargers Supplied by Power Conversion Products,Inc.Initially Reported on 820716.Replacement of 200 Ampere F1,F2 & F3 Fuses w/300 Ampere Fuses Recommended

Final Deficiency Rept Re Defect in 35-130-200 Battery Chargers Supplied by Power Conversion Products,Inc.Initially Reported on 820716.Replacement of 200 Ampere F1,F2 & F3 Fuses w/300 Ampere Fuses Recommended

ML20063A074
Person / Time
Site:	Columbia
Issue date:	08/13/1982
From:	Matlock R WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, G2-82-676, GO2-82-676, NUDOCS 8208240183
Download: ML20063A074 (2)

Text

Docket No. 50-397 50.55(e) Report ', , , , . .

s N Washington Public Power Supply System P.O. Box 968 3000 GeorgeWashingtonWay Richland, Washington 99352 .- (509)372-5000

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Docket 50-397 August 13, 1982 G02-82-676 R. H. Engelken U.S. Nuclear Regulatory Commission Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596

Subject:

NUCLEAR PROJECT NO. 2 10CFR50.55(e) REPORTABLE CONDITION #200 MODEL 3SC-130-200 BATTERY CHARGERS

Reference:

Telecon dated July 16, 1982, L. Floyd to J. Elin, same subject.

In accordance with the provisions of 10CFR50.55(e), your office was informed, by telephone, of the subject reportable condition on July 16, 1982.

Attachment A provides the Project's final report on this subject.

If you have any questions concerning this matter, please contact R. T.

Johnson at (509) 377-2501, extension 2712.

y <jYL R.JG. Matlock Program Director, WNP-2 LCF/kd

Attachment:

Final Report cc: W.S. Chin, BPA - Site R.A. Feil, NRC Resident Inspector - Site A. Forrest, Burns and Roe - HAP 0 N.D. Lewis, NRC J. Plunkett, NUS Corp.

R.E. Snaith, Burns and Roe - NY Document Control Desk, NRC Site Files - 917B 820 8 z4 o (D g W87

- FINAL REPORT SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 DOCKET NO. 50-397 - LICENSE N0. CPPR-93 10CFR50.55(e) REPORTABLE CONDITION #200 MODEL 3SC-130-200 BATTERY CHARGERS DESCRIPTION OF PROBLEM The project was notified of a potential defect in certain model 35-130-200 battery chargers with Service No. 07904-201, 07904-202, and 07904-203 supplied by Power Conversion Products, Inc. The potential defect invol.ves fuses F1, F2, and F3 used to protect the SCR's. These fuses are presently rated at 200 amps RMS. Because of the mounting configuration, a heating effect will cause the fuses to blow after the charger is operated for several hours (8 to 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />) at full load output (200 amps DC).

SAFETY IMPLICATIONS The loss of the ability to charge the batteries could result in a battery not being fully charged and the inability of the batteries to meet their design discharge capacity during a postulated accident.

APPROACH TO RESOLUTION An inspection was performed to see if WNP-2 had the deficient battery chargers identified by Power Conversion Products, Inc. It was found that 3 battery chargers were affected. They are:

Charger Model Serial #

Cl-1 3SC-130-200 07904-202 Cl-2 3SC-130-200 07904-201 Cl-5 (spare) 3SC-130-200 07904-203 Chargers Cl-1 and Cl-2 have been engergized since 1978 and our records show that on three different occasions one or more of the 200 amp fuses have blown.

Power Conversions Products, Inc. recommends replacement of the 200 amp F1, F2, and F3 fuses with 300 amp fuses for corrective action.

STATUS OF RESOLUTION The project has issued a Startup Problem Report to document the deficiency of the fuses failing and has been forwarded to the Architect Engineer for disposition referencing the letter from Power Conversion Products, Inc. The Architect Engineer is in the process of issuing a Project Engineering Directive to change the design documents and direct that fuses F1, F2, and F3 be changed from 200 amps to 300 amps as recommended by the manufacturer.

PROJECT COMPLETION OF CORRECTIVE ACTION It is anticipated that all corrective action will be completed by October 30, 1982.

I