Nuclear Engineering and Technology

  • 제47권7호
  • /
  • Pages.907-914
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  • 2015
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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PARAMETER DEPENDENCE OF STEAM EXPLOSION LOADS AND PROPOSAL OF A SIMPLE EVALUATION METHOD

  • MORIYAMA, KIYOFUMI (Division of Advanced Nuclear Engineering, Pohang University of Science and Technology) ;
  • PARK, HYUN SUN (Division of Advanced Nuclear Engineering, Pohang University of Science and Technology)
  • 투고 : 2015.04.02
  • 심사 : 2015.07.14
  • 발행 : 2015.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

The energetic steam explosion caused by contact between the high temperature molten core and water is one of the phenomena that may threaten the integrity of the containment vessel during severe accidents of light water reactors (LWRs). We examined the dependence of steam explosion loads in a typical reactor cavity geometry on selected model parameters and initial/boundary conditions by using a steam explosion simulation code, JASMINE, developed at Japan Atomic Energy Agency (JAEA). Among the parameters, we put an emphasis on the water pool depth that has significance in terms of accident mitigation strategies including cavity flooding. The results showed a strong correlation between the load and the premixed mass, defined as the mass of the molten material in low void zones (void fraction < 0.75). The jet diameter and velocity that comprise the flow rate were the primary factors to determine the premixed mass and the load. The water pool depth also showed a significant impact. The energy conversion ratio based on the enthalpy in the premixed mass was in a narrow range ~4%. Based on this observation, we proposed a simplified method for evaluation of the steam explosion load. The results showed fair agreement with JASMINE.

키워드

과제정보

연구 과제 주관 기관 : Korea Radiation Safety Foundation, National Research Foundation of Korea (NRF)

참고문헌

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피인용 문헌

  1. Analysis of Steam Explosion under Conditions of Partially Flooded Cavity and Submerged Reactor Vessel vol.2018, pp.None, 2018, https://doi.org/10.1155/2018/3106039