Research on DCS safety-in-depth of marine nuclear power system based on SHEL model

doi:10.16265/j.cnki.issn1003-3033.2019.08.014

Abstract

Abstract: In order to ensure operation safety of marine nuclear power system, DCS safety-in-depth system is studied. Firstly, deep safety characteristics of DCS were extracted by analyzing DCS structure of marine nuclear power. Secondly, safety-in-depth factors, including operation software, hardware, environment and livewire, were analyzed based on SHEL model. Then, a safety-in-depth protection system of DCS was constructed from three aspects, top-level safety management, overall safety architecture and safety protection technology. Finally, the influencing and being influenced degree, centrality and causality of system factors were calculated and analyzed based on DEMATEL method, and its key factors and points were identified. The results show that DCS safety-in-depth factors of marine nuclear power are complex and it is necessary to carry out safety-in-depth protection from management, safety architecture and protection technology, especially paying attention to key points of safety education and training, safety management system, virus protection and intrusion protection.

Key words: marine nuclear power, distributed control system (DCS), safety-in-depth, software-hardware-environment-livewire (SHEL) model, safety protection

CLC Number:

X946

YU Kun, PENG Jun. Research on DCS safety-in-depth of marine nuclear power system based on SHEL model[J]. China Safety Science Journal, 2019, 29(8): 87-92.

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