FRANTIC II - A Computer Code for Time Dependent Unavailability Analysis

摘要

The FRANTIC Computer code evaluates the time dependent and average unavailability for any general system model. The code is written in FORTRAN IV for the CDC 7600 computer. Non-repairable components, monitored components, and periodically tested components are handled. One unique feature of FRANTIC is the detailed, time dependent modeling of periodic testing which includes the effects of test downtimes, test overrides, detection inefficiencies, and test-caused failures. Burn-in and wear-out effects are included by using a time dependent failure rate for the components continuous changes in the failure rate are modeled by a Weibull distribution and the failure rate may also change discontinuously at each test. Periodic equations are developed and optionally, renewals may occur at either test or repair. Human errors and common mode failures can be included by assigning an appropriate constant probability for the contributors. The report is applicable to nuclear reactor accident studies.