Feasibility Study on Cross-tie Systems in Nuclear Power Plants Using Multi-unit PSA 


Vol. 38,  No. 3, pp. 102-109, Jun.  2023
10.14346/JKOSOS.2023.38.3.102


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  Abstract

Following the accident at Fukushima, the true impact of multi-unit accidents came to light. Accordingly, research related to multi-unit accident effect analysis, risk evaluation, and accident prevention/prevention technology has been conducted. Specific examples are mobile/fixed equipment such as multi-barrier accident coping strategy (MACST) and diverse and flexible coping strategies (FLEX), which have been introduced and installed in multi-units for preventing and mitigating multi-unit accidents. These strategies are useful for enhancing the safety of nuclear power plants (NPPs); however, a more efficient strategy is required in terms of the costs of physical and human resources. To effectively and efficiently mitigate an increase in multi-unit accidents, it is necessary to not only to utilize mobile/fixed equipment but to also use crosstie options with resources that already exist at NPPs. Therefore, we analyzed the current international and domestic status of crosstie systems technology and propose a method to evaluate feasibility alongside risk based on a multi-unit probabilistic safety assessment (PSA). To analyze the international and domestic status of crosstie systems technology, actual cases and related research were studied, and a list of potential crosstie safety resources was derived. Additionally, a case study was performed on crosstie cases of two systems within the assumed six units on-site under a multi-unit accident, and a multi-unit PSA-based risk evaluation method is proposed.

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  Cite this article

[IEEE Style]

박종우, 임호곤, 윤재영, "Feasibility Study on Cross-tie Systems in Nuclear Power Plants Using Multi-unit PSA," Journal of the Korean Society of Safety, vol. 38, no. 3, pp. 102-109, 2023. DOI: 10.14346/JKOSOS.2023.38.3.102.

[ACM Style]

박종우, 임호곤, and 윤재영. 2023. Feasibility Study on Cross-tie Systems in Nuclear Power Plants Using Multi-unit PSA. Journal of the Korean Society of Safety, 38, 3, (2023), 102-109. DOI: 10.14346/JKOSOS.2023.38.3.102.

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