United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9802240179



                                   Illinois Power Company

                                   Clinton Power Station

                                   P.O. Box 678

                                   Clinton, IL 61727

                                   Tel 217 935-5623

                                   Fax 217 935-4632



                                   Walter G.  MacFarland IV

                                   Chief Nuclear Officer

ILLINOIS

     POWER                         U-602934

An Illinova Company                2C.220

                                   4F.140



                                   February 17, 1998



Docket No. 50-461                  10CFR50.73

                                   10CFR21.21



Document Control Desk

Nuclear Regulatory Commission

Washington, D.C.  20555



Subject:  Clinton Power Station - Unit 1

          Licensee Event Report No. 98-001-00 and

          10CFR Part 21 Report No. 21-97-044/047



Dear Madam or Sir:



     Enclosed is Licensee Event Report (LER) No. 98-001-00 and 10CFR,

Part 21 Report No. 21-97-044/047: Failure of Division 2 Safety-Related

Battery Charger Due to Deficient Supplier Soldered Connections.  This

report is being submitted in accordance with the requirements of

10CFR50.73 and 10 CFR, Part 21.



     This Licensee Event Report contains the following commitments:



o    The SCR firing circuit card terminal posts for the Division 2

     battery charger were re-soldered to ensure the as-left connections

     were adequate.  The soldering technique for field wiring to SCR

     firing circuit card terminal posts will be added to vendor manual

     K2989-0001.



o    The battery charger deficiencies identified during this event were

     determined to potentially affect other safety-related equipment

     supplied by the same manufacturer, including the Divisions 1, 2, and

     4 Nuclear Systems Protection System regulating bypass transformers

     (1RP01E, 1RP02E, 1RP04E), the Divisions 1, 2, and 3 regulating

     transformers (0IP54EB, 0IP55EB, 1IP78E), and the A and B Reactor

     Protection System (RFS) bypass regulating transformer (1C71S005A,

     1C71S005B).  In addition two non-safety switchyard battery chargers

     and two non-safety balance of plant battery chargers were identified

     as potentially affected by these issues.  IP will inspect and

     rework/repair, as necessary, this equipment.





                                                       U-602934

                                                       Page 2



o    CPS is evaluating control and issuance of circuit cards.



o    The Division 3 safety-related battery charger (1E22-S001E) was

     supplied by a different supplier and has not exhibited similar

     evidence of degradation; however, IP will perform an inspection of

     this charger for deficiencies similar to those found in the Division

     2 battery charger.



                                        Sincerely yours,



                                        Walter G.  MacFarland, IV

                                        Chief Nuclear Officer



RSF/krk



Enclosure



cc:  NRC Clinton Licensing Project Manager

     NRC Resident Office, V-690

     Regional Administrator, Region III, USNRC

     Illinois Department of Nuclear Safety

     INPO Records Center

     Power Conversion Products, Inc.

     Sargent & Lundy





GENERAL INFORMATION or OTHER            EVENT NUMBER: 33731



LICENSEE: CLINTON POWER STATION         NOTIFICATION DATE:  02/17/98

    CITY: CLINTON        REGION: 3      NOTIFICATION TIME:  16:46 (ET]

  COUNTY:                 STATE: IL     EVENT DATE:         01/16/98

LICENSE#:             AGREEMENT: Y      EVENT TIME:         12:00[CST]

  DOCKET:                               LAST UPDATE DATE:   02/17/98



                                             NOTIFICATIONS



                                        JIM MCCORMICKBARGER      RDO



NRC NOTIFIED BY: R.  FRANTZ             VERN HODGE               NRR

HQ OPS OFFICER:  DOUG WEAVER



EMERGENCY CLASS: NOT APPLICABLE

10 CFR SECTION:

CCCC 21.21          UNSPECIFIED PARAGRAPH



                               EVENT TEXT



10 CFR PART 21 - DEFECTIVE SOLDERING IN A SAFETY-RELATED BATTERY

CHARGER 



THE BASIC COMPONENTS INVOLVED ARE THE DIVISION 2 SAFETY-RELATED

BATTERY

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 SOLDERED CONNECTIONS

THROUGHOUT

THE DIVISION 2 BATTERY CHARGER.  IT WAS ALSO NOTED THAT THE TIME

DELAY

FOR THE INS LED 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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