Maintainability Analysis Using Q-GERT Network Simulation
Article Abstract:
In reliability analyses of nuclear reactor safety systems, time-dependent phenomena (such as component failure during operation and the ensuing repair activity) are often disregarded or treated quasi-statically because the time dependencies involved are not amenable to closed-form analytic formulation. In addition, conditional phenomena (such as a failure mode that depends on the failure mode in a previous event) and phenomena that must be characterized by arbitrary probability distributions are often ignored. This paper reports the initial application of the computer program Q-GERT, an existing code that uses dynamic Monte Carlo modeling, to reactor safety-system simulation and analysis. Using Q-GERT with its Monte Carlo techniques, the above shortcomings can, in principle, be dealt with, and the analysis can be elevated from the level of a reliability analysis to that of a maintainability analysis. This new application of Q-GERT, called the Maintainability Analysis Procedure (MAP), is illustrated by simulating and evaluating the behavior of a simple safety system as this system is subjected to each of four possible failure processes. These processes are distinguished by the number and complexity of the included phenomena, and the effects on estimates of the probability of system failure are shown to be significant as the processes become more complex. (Reprinted by Permission of Publisher.)
Publication Name: SIMULATION
Subject: Engineering and manufacturing industries
ISSN: 0037-5497
Year: 1985
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Desktop Computers and Simulation: A Roundtable Discussion
Article Abstract:
Ro Favreau and George Marr of Sorrento Valley Associates, Alexander Pugh III of Pugh-Roberts Associates, and Ray Swartz of Berkeley Decision-Systems discuss the use of microcomputers for simulation applications. The desktop computer is widely used for the development of simulation models and as process simulators for training purposes. Although several simulation languages are available for microcomputers, there should be more simulation tools developed for nonprofessionals. There is a lot of room for improvement of graphics packages.
Publication Name: SIMULATION
Subject: Engineering and manufacturing industries
ISSN: 0037-5497
Year: 1985
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