Practical availability analysis of standby systems
Comprehensive availability models are developed in this paper for analyzing redundant standby safety systems. The models, which include both periodic inspections and continuous monitoring for discovering failures, incorporate human errors associated with testing, monitoring, and repair as well as spurious alarms and failures after a demand during the mission time. Equations are developed for calculating optimum inspection intervals and average steady state availabilities of standby m-out-of-n:G systems (with several schemes of staggering the tests), as are techniques for including undetected and common-cause failures. Analytical models provide a basis for many generic conclusions. Numerical examples representative of safety systems in nuclear power plants illustrate, for example, the importance of developing monitoring techniques to detect errors made in testing and returning components to service after maintenance.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 5493491
- Journal Information:
- Proc., Annu. Reliab. Maintain. Symp.; (United States), Journal Name: Proc., Annu. Reliab. Maintain. Symp.; (United States); ISSN PRMSC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210900* -- Nuclear Power Plants-- Process Heat Reactors-- (-1987)
42 ENGINEERING
420600 -- Engineering-- Safety Engineering-- (-1987)
AVAILABILITY
ENGINEERED SAFETY SYSTEMS
HUMAN FACTORS
MATHEMATICAL MODELS
MONITORING
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
RISK ASSESSMENT
SAFETY
TESTING
THERMAL POWER PLANTS