Emergency Diesel Generator Testing

EMERGENCY DIESEL GENERATOR HEAT EXCHANGER TESTING
C. M. D’Angelo
M. E. Kerst
Proto-Power Corporation
591 Poquonnock Road
Groton, CT 06340

and

S. M. Ingalls
Northeast Nuclear Energy Company
Rope Ferry Road
Waterford, CT 06385 EMERGENCY DIESEL GENERATOR HEAT EXCHANGER TESTING
C. M. D’Angelo
M. E. Kerst
Proto-Power Corporation
591 Poquonnock Road
Groton, CT 06340

and

S. M. Ingalls
Northeast Nuclear Energy Company
Rope Ferry Road
Waterford, CT 06385
Abstract
Nuclear Regulatory Commission (NRC) Generic Letter 89-13 requires periodic testing of all raw-water-cooled safety-related heat exchangers to ensure that the General Design Criteria of 10 CFR Part 50 are being met. Specifically, GL 89-13 addresses the requirements of GDC 44--Cooling Water, GDC 45--Inspection of Cooling Water System, and GDC 46--Testing of Cooling Water System. The heat exchangers associated with the Emergency Diesel Generators (EDG) at most nuclear power plants are raw-water cooled and safety-related, and therefore, fall under the requirements of GL 89-13. Whereas most of the larger safety-related heat exchangers can be tested and the resulting data reduced to an easily understood baseline value such as fouling factor, the EDG heat exchangers usually can not be tested in this manner due to lack of instrumentation, complex piping configurations, and automatic temperature-sensing flow control valves. The operational questions posed by GL 89-13 could be resolved readily if the EDG heat exchangers could be tested exactly at the conditions required or postulated by the most limiting accident scenario. Some of these parameters, such as kilowatt loading, can be easily attained; however, certain parameters such as the cooling water inlet temperature, or the external ambient air temperature may not be controllable. Such is the case with the Emergency Diesel Generator heat exchangers at Millstone Point Unit 1 (MP1). This paper details a test procedure that determined

References: 1. United States Nuclear Regulatory Commission Generic Letter, "Service Water System Problems Affecting Safety-Related Equipment (Generic Letter 89-13)", dated July 18, 1989. 4. General Electric Specification 22A1105, Rev. 0, dated July 9, 1966 - Design Specification for Turbine Building Ventilating, Cooling and Heating Systems. 10. M. David Burghardt, Engineering Thermodynamics with Applications, Harper & Row Publishers, 1978.