Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (7): 70602-070602.doi: 10.11889/j.0253-3219.2016.hjs.39.070602

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Processing method of complex boundary condition in event-trees based on structure reuse

XU Yinlong1,2, CHEN Shanqi1, WANG Jiaqun1, WANG Jin1, WANG Fang1   

  1. 1 Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, China;
    2 University of Science and Technology of China, Hefei 230027, China
  • Received:2016-03-07 Revised:2016-03-29 Online:2016-07-10 Published:2016-07-08
  • Supported by:

    Supported by the National Special Program for ITER (No.2015GB116000), the Foundation of Key/Innovative Project of Hefei Centre of Physical Science and Technology (No.2014FXCX004), the Informatizational Special Projects of Chinese Academy of Sciences (No.XXH12504-1-09), National Natural Science Foundation of China (No.11405204)


Background: Classical fault-tree link method is usually used in event-tree analysis to convert sequence/consequence into final sequence/consequence fault-tree models, during which boundary condition and success branch treatment are set to ensure the final model satisfying certain requirement. Purpose: This study aims to solve the structure redundancy problem caused by complex boundary setting in the final fault trees. Methods: Based on structure reuse, a processing method of complex boundary condition in event-tree is proposed. Results: Processing speed of this method is significantly improved for event tree analysis under the condition that the qualitative and quantitative result is identical. Conclusion: This complex boundary condition processing method provides an efficient solution for real time risk analysis of nuclear power plant.

Key words: Probabilistic safety analysis, Event-tree, Boundary condition, RiskA

CLC Number: 

  • TL364+.5