放射冷却を利用した受動的炉容器冷却システムの研究; 実装方法の検討

Research on a passive Vessel Cooling System (VCS) utilizing radiative cooling; Examination of how to integrate the actual VCS with a reactor building

高松 邦吉 ; 舩谷 俊平*

Takamatsu, Kuniyoshi; Funatani, Shumpei*

本研究は、外的ハザードに対する安全性向上に向けて、水や空気等の流体の駆動に期待するのではなく、事故時の崩壊熱及び残留熱を受動的に冷却可能な、放射冷却を利用した新たな冷却システム(炉容器冷却システム)の開発を目的とする。本発表では、提案する炉容器冷却システムを原子炉建家と一体化した構造概念を提示するとともに、これまでの実験及び解析検討結果に基づく性能評価結果を報告する。

Our research objectives are to develop a VCS that utilizes radiative cooling to passively remove decay heat and residual heat from the RPV during expected and unexpected natural phenomena and accidents. To solve the back pressure problem around the inlet and outlet, it is necessary to minimize reliance on fluid actuation, such as water, air, etc., and to avoid using natural circulation or natural convection as much as possible to improve safety against external hazards. In this presentation, we present the structural concept of the proposed VCS integrated with the reactor building and report the results of the cooling performance evaluation based on the results of experimental and analytical studies conducted to date.