United States Nuclear Regulatory Commission - Protecting People and the Environment


LICENSEE: ILLINOIS POWER CO.                 

SITE: CLINTON 1                             EN NUMBER:32840

DOCKET: 05000461                         EVENT DATE: 05-07-97

RX TYPE: BWR                             EVENT TIME: 00:00

VENDORS: GE-6                           NOTIFY DATE: 08-29-97

EMERGENCY CLASS: N/A  REGION: 3 STATE: IL      TIME: 08:14

OPS OFFICER: CHAUNCEY GOULD           

10 CFR SECTION: CCCC  21.21               UNSPECIFIED PARAGRAPH

UNIT  SCRAM   RX   INIT  INITIAL MODE     CURR   CURRENT MODE

      CODE   CRIT  PWR                    PWR

 1    N       N      0   COLD SHUTDOWN      0   COLD SHUTDOWN  



- 10CFR PART 21 REPORT -                                         

                                                                 

THE LICENSEE IS REPORTING A 10CFR PART 21 CONDITION INVOLVING A  

COMPONENT FOR WESTINGHOUSE MODEL 50DHP350, 4160-VOLT CIRCUIT     

BREAKERS.  THE COMPONENT IS THE ARC CHUTE, MANUFACTURER PART     

#567F417G02.  THE ARC CHUTE APPEARS TO BE DIFFERENT IN           

CONFIGURATION FROM THE ORIGINAL ARC CHUTE AND EXHIBITED AN       

INADEQUATE CLEARANCE BETWEEN THE REAR ARC HORN AND THE ARC CHUTE 

MOLDED CASE DURING INSTALLATION.  THE MAJOR DIFFERENCES APPEAR TO

BE THE POSITION AND ANGLE OF BEND FOR CONTACT.  DUE TO THE       

INADEQUATE CLEARANCE WHICH OCCURS DURING INSTALLATION, EXCESSIVE 

FORCE WOULD BE REQUIRED ON THE LINE POLE UNIT TO ALLOW THE ARC   

CHUTE TO ATTACH TO THE FRONT ARC CHUTE SUPPORT.                  

THE LICENSEE HAS 5 OF THE POTENTIALLY AFFECTED ARC CHUTES ON     

HAND.  THE LICENSEE IS NOT AWARE OF OTHER FACILITIES THAT COULD  

BE AFFECTED BY THIS DEFICIENCY.                                  



Page Last Reviewed/Updated Thursday, March 29, 2012