05000461/LER-1998-001, Forwards LER 98-001-00,re Failure of Division 2 Safety Related Battery Charger Due to Deficient Supplier Soldered Connections.Ler Also Contains 10CFR21 Rept.Commitments Made within Ltr,Listed

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Forwards LER 98-001-00,re Failure of Division 2 Safety Related Battery Charger Due to Deficient Supplier Soldered Connections.Ler Also Contains 10CFR21 Rept.Commitments Made within Ltr,Listed
ML20203A982
Person / Time
Site: Clinton Constellation icon.png
Issue date: 02/17/1998
From: Walter MacFarland
ILLINOIS POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20203A984 List:
References
REF-PT21-98 U-602934, NUDOCS 9802240179
Download: ML20203A982 (2)


LER-2098-001, Forwards LER 98-001-00,re Failure of Division 2 Safety Related Battery Charger Due to Deficient Supplier Soldered Connections.Ler Also Contains 10CFR21 Rept.Commitments Made within Ltr,Listed
Event date:
Report date:
4612098001R00 - NRC Website

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'Yr'7 9 3 f FPT / w.a.e o. usdadand w u.* 30; . g 1g . 5gj '"* cnumer onw U402934 An imne . S.mp.ar 2C220 4F.140 Febrsan 17, 1998 Docket No. 50 461 10CFR50.73 10CFR21.21 Document ControlDesk Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Clinton Power Station Unit 1 Licensee Event Report No.98-001 00 and l

10CFF Part 21 Reoort No. 21 97 044/047 l

Dear Madam or Sir:

Enclosed is Licensee Event Report (LER) No. 98 001-00 and 10CFR, Part 21 ReportNo. 21-97 044/047: Etilure of Division 2 Safety Related Batterv Charger Due to Deficient Supplier Soldered Connections. This report is being submitted in accordance with the requirements of10CFR50.73 and 10 CFR, Part 21.

This Licensee Event Report contains the following commitments: ..- f- A /

. The SCR firing circuit card terminsi pcits for the Division 2 battery charger were re soldered to ensure the as-left connections were adequate. The soldering technique im rield wiring to SCR fuing circuit card terminal posts will be added to vendor manualK2989 0001.

  • The battery charger deficiencies identiSed during this event were determined to potehtially affect other safety related equipment supplied by the same manufacturer, including the Divisions 1,2, and 4 Nuclear Systems Protection System regulating bypus transformers (1RP01E,1RP02E,1RPO4E), the Divisions 1, 2, and 3 r*hulating transformers (OIP54EB, OIP55EB, IIP 78E), and the A and B Reactor Protection System (RPS) bypass regulating transformer

, (IC71S005A, IC715005B). In addition two non safety switchyard battery

s,yvbO chargers and two non safety balance of plant battery chargers were identified as potentially affected by these issues. IP vdllinspect and rework / repair, as necessary, this equipment.
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U @ 2934 Page2

  • CPS is evaluating control and lasuance of c8tcuit cards.

The Division 3 ufety related battery chwger (1E22-S001E) was supplied by a y different supplier and has not exhibited similu evidence of degradation; however,

$ IP will perform an inspection of this chuger for deficiencies sunilar to those found p inthe Division 2 battery charger,

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Sincerely yours, q e

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Walter G. MacFarland, IV ChiefNuclear 05cer c RSF/krk Enclosure cc: NRC Clinton Licensing Project Manager NRC Resident 05ce, V.590 I P.egiona' Adrninistrator, Region III, USNRC Einois Deputment ofNuclear S4 sty INPO Records Center Power Conversion Products, Inc.

Sargent & Lundy r_

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O G'SNERAL INFORMATION or OTHER EVENT NUMBER: 33731 LICENSEE: CLINTON POWER STATION NOTIFICATION DATE: 02/17/98

  • CITY: CLINTOM REGION: 3 NOTIFICATION TIME: 16:46 (ET]

COUNTY: STATE: IL EVENT DATE: 01/16/98 LZCENSE#: AGREEMENT: Y EVENT TIME: 12 : 00 [ CST)

DOCKET: LAST UPDATE DATE: 02/17/SS NOTIFICATIONS JIM MCCORMICKBARGER RDO NRC NOTIFIED BY: R. FRANTZ VERN HODGE NRR HQ OPS OFFIL'ER: DOUG WEAVER l EMERGENCY CLASS: NOT APPLICABLE l 10 CFR SECTION-l CCCC 21.21 UNSPECIFIED PARAGRAPH EVENT TEXT j 10 CFR PART 21 - DEFECTIVE SOLDERING IN A SAFETY-RELATED BATTERY CHARGER ,

THE BASIC COMPONENTS INVOLVED ARE THE DIVISION 2 SAFETY-RELATED BATTERY l CHARGER, MODEL 3SC-130-300, AND THE HIGH VOLTAGE CIRCUIT CARD, MODEL DSHV120T2-01. THESE COMPONENTS WERE SUPPLIED TO CLINTON POWER STATION BY POWER CONVERSION PRODUCTS.

THE LICENSEE HAS IDENTIFIED INADEQUATE SOLDERCD CONNECTIONS THROUGHOUT THE DIVISION 2 BATTERY CHARGER. IT WAS ALSO NOTED THAT THE TIME DELAY FOR THE INSTALLED DSHV CIRCUIT CARD WAS APPROXIMATELY 16 SECONDS, THE TIME DELAY FOR THE REPLACEMENT CIRCUIT CARD WAS 6 SECONDS, AND THE PURCHASE SPECIFICATION REQUIRED A 30-SECOND TIME DELAY.

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