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Comparison Between Direct- and Indirect-Cooling Core Catchers

직접냉각방식 및 간접냉각방식 Core Catcher의 성능비교

  • Suh, Jung-Soo (KHNP Central Research Institute, Korea Hydro and Nuclear Power Co., Ltd.) ;
  • Lee, Jong-Ho (KHNP Central Research Institute, Korea Hydro and Nuclear Power Co., Ltd.) ;
  • Bae, Byung-Hwan (KHNP Central Research Institute, Korea Hydro and Nuclear Power Co., Ltd.)
  • 서정수 (한국수력원자력(주) 한수원 중앙연구원) ;
  • 이종호 (한국수력원자력(주) 한수원 중앙연구원) ;
  • 배병환 (한국수력원자력(주) 한수원 중앙연구원)
  • Received : 2012.01.04
  • Accepted : 2012.08.07
  • Published : 2012.10.01

Abstract

The European nuclear design requirements, which should be satisfied by nuclear reactors in Europe, usually recommend a so-called core catcher, which is a molten core ex-vessel cooling facility, to manage a severe accident at a nuclear reactor. Two different types of core catcher concepts are compared to determine their abilities to manage severe accidents and cool core melts. The study reveals that direct cooling is better for cooling capacity and is convenient to construct, while indirect cooing is better for the management of a severe accident.

유럽지역으로의 원전 수출을 위해서는 유럽의 원전 인허가요건을 충족시켜야 하며, 이에 따르면 원전의 중대사고 대처설비로 통상 Core Catcher로 불리는 노외 노심 용융물 냉각설비를 갖출 것을 권장하고 있다. 이에 따라 본 논문에서는 노심 용융물 직접냉각방식과 간접냉각방식에 대해 각각의 개념 안의 장/단점을 비교, 검토하였으며, 그 결과 직접냉각방식은 냉각효율 측면에서, 간접냉각방식은 중대사고 사고관리 측면에서 각각 우위를 보였다.

Keywords

References

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