Part 21 Report - 1998-310

LICENSEE: ILLINOIS POWER CO. SITE: CLINTON 1 EN NUMBER:34110 DOCKET: 05000461 EVENT DATE: 04-21-98 RX TYPE: BWR EVENT TIME: 00:00 VENDORS: GE-6 NOTIFY DATE: 04-21-98 EMERGENCY CLASS: N/A REGION: 3 STATE: IL TIME: 10:00 OPS OFFICER: CHAUNCEY GOULD 10 CFR SECTION: CDEG 21.21(c)(3)(i) DEFECTS/NONCOMPLIANCE UNIT SCRAM RX INIT INITIAL MODE CURR CURRENT MODE CODE CRIT PWR PWR 1 N N 0 COLD SHUTDOWN 0 COLD SHUTDOWN 10 CFR PART 21 REPORT - LACK OF RCIC CIRCUIT ISOLATION. THE LICENSEE SUBMITTED A PART 21 REPORT CONCERNING THE POSSIBILITY THAT REMOTE SHUTDOWN PANEL OPERATION OF THE REACTOR CORE ISOLATION COOLING (RCIC) SYSTEM MAY BE PREVENTED FOLLOWING A MAIN CONTROL ROOM FIRE DUE TO A SUPPLIER DESIGN LACKING CIRCUIT ISOLATION. THIS CONDITION IS DUE TO THE INSTALLATION OF INTERFACE CONNECTIONS TO THE RCIC SYSTEM TO PROVIDE INPUTS FOR THE GE TRANSIENT ANALYSIS RECORDING SYSTEM (GETARS). THIS GE DESIGN LACKED ISOLATION FOR CABLE 1RI85C CONNECTED TO THE FLOW CONTROL INPUT AT THE SIGNAL CONVERTER, 1E51-N590, AND CABLE 1RI85B CONNECTED TO THE RCIC TURBINE EG-M CONTROL BOX, 1E51-N591, SPEED OUTPUT TO THE TURBINE TACHOMETERS. THE CORRECTIVE ACTION WILL BE TO MODIFY THE INTERFACE OF GETARS CABLES 1RI85B AND 1RI85C WITH THE REMOTE SHUTDOWN PANEL TO PROVIDE ADEQUATE ISOLATION. THE LICENSEE WILL ALSO PERFORM A COMPREHENSIVE REVIEW OF SAFE SHUTDOWN REQUIRED CONTROL CIRCUITS TO ENSURE THAT THE POTENTIAL FOR FIRE DAMAGE IN THE MAIN CONTROL ROOM IS PROPERLY EVALUATED FOR IMPACT ON SAFE SHUTDOWN OPERATION FROM THE REMOTE SHUTDOWN PANEL. THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR.

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