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Evaluation of Pressure History due to Steam Explosion

증기폭발에 의한 압력이력 평가

  • 김승현 (경희대학교 원자력공학과) ;
  • 장윤석 (경희대학교 원자력공학과) ;
  • 송성주 (한국원자력안전기술원) ;
  • 황태석 (한국원자력안전기술원)
  • Received : 2013.04.09
  • Accepted : 2014.02.03
  • Published : 2014.04.01

Abstract

Steam explosions can be caused by fuel-coolant interactions resulting from failure of the external vessel cooling system in a new nuclear power plant. This can threaten the integrity of structures, including the nuclear reactor and the containment building. In the present study, an improved technique for analyzing the steam explosion phenomenon was proposed on the basis of previous research and was verified by simulations involving alumina experiments. Also, the improved analysis technique was applied to determine the pressure history of the reactor cavity in accordance with postulated failure locations. The results of the analysis revealed that the effects of vessel side failure are more serious than those of vessel bottom failure, with approximately 70% higher maximum pressure.

Keywords

External Reactor Vessel Cooling;In-vessel Retention;Severe Accident;Steam Explosion

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