Preliminary Study on HTR-10 Operating in Higher Outlet Temperature

Abstract High Temperature Gas-cooled Reactor (HTGR), which has well-known safety features and high temperature heat supply capability, is expected to be widely used for technology utilization including the hydrogen production, so contributing reduction of carbon dioxide emissions in various sectors. The 10 MW gas-cooled test (HTR-10) had been constructed operated China as a pilot plant demonstrate inherent modular HTGR. first criticality HTR-10 at air condition was realized on December 1, 2000, full power operation 72 h January 29, 2003. Supported by Chinese National S&T Major Project, HTGR production are now being studied. physical thermal hydraulic design raise outlet helium reactor core from 700 °C 850~1000 carried out. In this paper, preliminary HTR- with 950 (HTR-10H) introduced. density distribution, fuel distribution pressure vessel (RPV) studied identify what need focused next. Besides, typical DLOFC accident evaluate feature operating under higher temperature. results show that, temperature, original acceptance criteria will challenged. future, optimization, well possible modification these criteria, were set more than two decades ago, should based current knowledge element properties structure material properties.