Phenomena identification and ranking table exercise for thorium based molten salt reactor-solid fuel

• 作 者: Xiaojing LIU Qi WANG Zhaozhong HE Kun CHEN Xu CHENG
• 机 构: School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China“,”S
• 出 处: 能源前沿
• 发表日期: 2019年4期
• 关键词: phenomena identification and ranking table (PIRT) thorium based molten salt reac

Thorium based molten salt reactor-solid fuel (TMSR-SF) design is an innovative reactor concept that uses high-temperature tristructural-isotropic (TRISO) fuel with a low-pressure liquid salt coolant.In anticipation of getting licensed applications for TMSR-SF in the future,it is necessary to fully understand the significant features and phenomena of TMSR-SF design,as well as its transient behavior during accidents.In this paper,the safety-relevant phenomena,importance,and knowledge base were assessed for the selected events and the transient of TMSR-SF during station blackout scenario is simulated based on RELAP/SCDAPSIM Mod 4.0.The phenomena having significant impact but with limited knowledge of their history are core coolant bypass flows,outlet plenum flow distribution,and intermediate heat exchanger (IHX) over/under cooling transients.Some thermal hydraulic parameters during the station blackout scenario are also discussed.