Operating experience feedback report: Service water system failures and degradations: Volume 3
A comprehensive review and evaluation of service water system failures and degradations observed in operating events in light water reactors from 1980 to 1987 has been conducted. The review and evaluation focused on the identification of causes of system failures and degradations, the adequacy of corrective actions implemented and planned, and the safety significance of the operating events. The results of this review and evaluation indicate that the service water system failures and degradations have significant safety implications. These system failures and degradations are attributable to a great variety of causes, and have adverse impact on a large number of safety-related systems and components which are required to mitigate reactor accidents. Specifically, the causes of failures and degradations include various fouling mechanisms (sediment deposition, biofouling, corrosion and erosion, pipe coating failure, calcium carbonate, foreign material and debris intrusion); single failures and other design deficiencies; flooding; multiple equipment failures; personnel and procedural errors; and seismic deficiencies. Systems and components adversely impacted by a service water system failure or degradation include the component cooling water system, emergency diesel generators, emergency core cooling system pumps and heat exchangers, the residual heat removal system, containment spray and fan coolers, control room chillers, and reactor building cooling units. 44 refs., 10 figs., 5 tabs.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Office for Analysis and Evaluation of Operational Data
- OSTI ID:
- 6572416
- Report Number(s):
- NUREG-1275-Vol.3; ON: TI89004587; TRN: 89-002121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Operating experience review of service water system problems
Steam generator tube failures
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BWR TYPE REACTORS
REACTOR COOLING SYSTEMS
PWR TYPE REACTORS
WATER SUPPLY
EVALUATION
FAILURES
FEEDWATER
HEAT TRANSFER
HUMAN FACTORS
HYDRAULICS
MAINTENANCE
PIPES
REACTOR SAFETY
RISK ASSESSMENT
COOLING SYSTEMS
ENERGY SYSTEMS
ENERGY TRANSFER
FLUID MECHANICS
HYDROGEN COMPOUNDS
MECHANICS
OXYGEN COMPOUNDS
REACTOR COMPONENTS
REACTORS
SAFETY
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS
220900* - Nuclear Reactor Technology- Reactor Safety
210100 - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled