[3E10-15] Advanced Reactor Safety

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[3E15] Research on a passive Vessel Cooling System (VCS) utilizing radiative coolingExamination of how to integrate the actual VCS with a reactor building

*Kuniyoshi Takamatsu¹, Shumpei Funatani² (1. JAEA, 2. Univ. of Yamanashi)

Keywords:

HTGR,Vessel Cooling System,Passive Safety,Radiation

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.