Diesel-generator reliability at nuclear power plants: data and preliminary analysis. Interim report

Technical Report · Tue Jun 01 00:00:00 EDT 1982

OSTI ID:5338519

McClymont, A; McLagan, G

This report summarizes work performed under RP1233-1 relating to the collection and analysis of data pertaining to diesel generator reliability in nuclear power plants. Drawing from data collected on-site at plants, data supplied by utilites, and data from Licensee Event Reports (LERs), the report describes methods of deriving reliability estimates from data for use in probabilistic risk assessment and presents results when these methods are applied to data collected from 14 plants. Specifically, data are used to estimate diesel failure probabilities for failures to start and failure rates for failures to continue to run. A sampling theory approach and a Bayesian approach to failure probability estimation are compared. The data are used to derive estimates of diesel repair time for some plants, maintenance outages, and multiple diesel failure rates. In addition, a section is included that presents suggestions for failure-rate estimation when an accurate count of diesel start attempts at a plant is not available. The final section presents an analysis of diesel failures based on data from LERs, including a breakdown of failure event by subsystem, failure mode, and failure cause. Appendixes include detailed summaries of the data used in the analysis of previous sections.

• Research Organization: Science Applications, Inc., Palo Alto, CA (USA)
• OSTI ID: 5338519
• Report Number(s): EPRI-NP-2433; ON: DE82905780
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
DIESEL ENGINES
ELECTRIC GENERATORS
ENGINES
FAILURES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MAINTENANCE
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
OUTAGES
POWER PLANTS
PROBABILITY
RELIABILITY
REPAIR
RISK ASSESSMENT
THERMAL POWER PLANTS