United States Nuclear Regulatory Commission - Protecting People and the Environment


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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