Part 21 Report - 1997-720

LICENSEE: ILLINOIS POWER CO. SITE: CLINTON 1 EN NUMBER:32977 DOCKET: 05000461 EVENT DATE: 09-22-97 RX TYPE: BWR EVENT TIME: 00:00 VENDORS: GE-6 NOTIFY DATE: 09-22-97 EMERGENCY CLASS: N/A REGION: 3 STATE: IL TIME: 19:00 OPS OFFICER: STEVE SANDIN 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 10 CFR PART 21 NOTIFICATION THE LICENSEE SUBMITTED COMBINED LICENSEE EVENT REPORT 97-022-00 AND 10 CFR PART 21 REPORT 21-97-036: DESIGN OF DIESEL GENERATOR VENTILATION SUBSYSTEMS OUTSIDE DESIGN BASIS AS A RESULT OF FAILURE TO INCLUDE MINIMUM AND MAXIMUM OUTSIDE AIR TEMPERATURE EXTREMES DUE TO DESIGN ERROR. THE FOLLOWING TEXT IS A PORTION OF A FACSIMILE RECEIVED FROM THE LICENSEE: "10 CFR [PART] 21 REPORT 21-97-036" "ON JULY 24, 1997, DURING INVESTIGATION OF CONDITION REPORT (CR) 1-97-06-302 WHICH IDENTIFIED AN ISSUE INVOLVING INCREASED DIESEL GENERATOR ROOM HEATING, VENTILATING, AND AIR CONDITIONING [(HVAC)] SYSTEM FAN HORSEPOWER CONSUMPTION AT LOW TEMPERATURE AND THE EFFECT ON DIESEL GENERATOR LOADING AND ELECTRICAL LOAD DISTRIBUTION SYSTEM, QUESTIONS WERE RAISED ABOUT THE DESIGN OF THE HVAC SYSTEM. THESE QUESTIONS RESULTED IN AN EVALUATION OF THE [DIESEL GENERATOR] VENTILATION SYSTEM FOR ADEQUACY DURING EXTREME HIGH AND LOW OUTSIDE AMBIENT AIR TEMPERATURES. DUE TO DESIGN LIMITATIONS ON THE DIESEL GENERATOR ROOM VENTILATION SUBSYSTEMS, IT WAS DETERMINED [THAT] ADEQUATE COOLING CAPACITY MAY NOT BE AVAILABLE TO SUPPORT OPERABILITY OF THE DIESEL GENERATORS IF OUTSIDE TEMPERATURES EXCEED LEVELS THAT ARE NOT IMPROBABLY HIGH FOR THE SUMMER SEASON. THIS ISSUE WAS DETERMINED TO BE POTENTIALLY REPORTABLE UNDER 10 CFR [PART] 21. ILLINOIS POWER (IP) HAS COMPLETED AN EVALUATION OF THIS ISSUE AND CONCLUDES THAT IT IS REPORTABLE UNDER THE PROVISIONS OF 10 CFR PART 21."

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