Risk-Informed Optimization of Operation and Procedures for Korea Research Reactor 


Vol. 37,  No. 2, pp. 43-53, Apr.  2022
10.14346/JKOSOS.2022.37.2.43


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  Abstract

This paper describes an attempt to improve and optimize the operational safety level of a domestic research reactor by conducting a probabilistic safety assessment (PSA) under full-power operating conditions. The PSA was undertaken to assess the level of safety at an operating research reactor in Korea, to evaluate whether it is probabilistically safe and reliable to operate, and to obtain insights regarding the requisite procedural and design improvements for achieving safer operation. The technical objectives were to use the PSA to identify the accident sequences leading to core damage, and to conduct sensitivity analyses based thereon to derive insights regarding potential design and procedural improvements. Based on the dominant accident sequences identified by the PSA, eight types of sensitivity analysis were performed, and relevant insights for achieving safer operation were derived. When these insights were applied to the reactor design and operating procedure, the risk was found to be reduced by approximately ten times, and the safety was significantly improved. The results demonstrate that the PSA methodology is very effective for improving reactor safety in the full-power operating phase. In particular, it is a highly suitable approach for identifying the deficiencies of a reactor operating at full power, and for improving the reactor safety by overcoming those deficiencies.

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[IEEE Style]

이윤환 and 장승철, "Risk-Informed Optimization of Operation and Procedures for Korea Research Reactor," Journal of the Korean Society of Safety, vol. 37, no. 2, pp. 43-53, 2022. DOI: 10.14346/JKOSOS.2022.37.2.43.

[ACM Style]

이윤환 and 장승철. 2022. Risk-Informed Optimization of Operation and Procedures for Korea Research Reactor. Journal of the Korean Society of Safety, 37, 2, (2022), 43-53. DOI: 10.14346/JKOSOS.2022.37.2.43.

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