A graphical method for breaking logical loops based on multi-tree structure
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A. Yang
Abstract
Logical loops or circular logics, interpreted as circular supporting relations among systems, remain a longstanding challenge in the probabilistic safety assessment (PSA). Logical loops are commonly found in complex industrial systems. Due to the existence of the logical loops, the minimal cut sets cannot be directly obtained. In order to solve this problem, the logical loops should be broken properly. This paper proposes a graphical method based on multi-tree structure. By constructing the simplified multi-tree, logical loops both in linearly and non-linearly interrelated systems are solved. To illustrate this method, examples of linearly interrelated systems and non-linearly interrelated systems are given in this paper. As a supplement, this method is applied to the well-known complex logical loops in the nuclear power plant. It shows that this method is highly intuitive and efficient by means of graphs.
© 2020 by Walter de Gruyter Berlin/Boston
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Articles in the same Issue
- CONTENTS
- In Memoriam
- Scientific inheritance of Eugenijus Ušpuras
- Comparison of heat transfer in natural and forced circulation under rolling motion
- Study of cooling strategy for pressure vessel in pool research reactor at accident situation
- Optimal operation strategy of LWR based on the PCI online prognosis model
- Research reactor model for isotope production based on the design of VVER-440 reactors
- A decision-making method based on Bayesian optimization algorithm for small modular reactor
- A graphical method for breaking logical loops based on multi-tree structure
- Technical Note
- Summary of 3rd Sino-German symposium on fundamentals of advanced nuclear safety technology
- Note · Imprint
