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The conceptual design of thorium‐based molten salt energy amplifier
Author(s) -
Yang Pu,
Lin Zuokang,
Wan Weishi,
Yu Xiaohan,
Cai Xiangzhou,
Dai Zhimin,
Dai Ye
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6036
Subject(s) - thorium fuel cycle , thorium , nuclear engineering , liquid fluoride thorium reactor , molten salt reactor , spent nuclear fuel , molten salt , fission products , nuclear fuel , materials science , mox fuel , nuclear reactor core , uranium , plutonium , environmental science , radiochemistry , chemistry , engineering , metallurgy
Summary Thorium is a possible nuclear fuel to achieve the sustainable development of nuclear energy. The molten salt reactor (MSR) has great potential and advantages in realizing the efficient utilization of thorium resources. However, there are still many challenging technologies to be developed, such as the graphite lifetime problem, the complex online processing of the fuel salt. Therefore, the actual deployment timelines of thorium‐based MSR are still unpredictable. In this research, a Thorium‐based Molten Salt Fast Energy Amplifier (TMSFEA), which is based on the subcritical chloride salt fast reactor, is proposed. It adopts a single‐fluid, moderator‐free simple core design. A ternary molten salt system containing sodium chloride (NaCl), thorium tetrachloride (ThCl 4 ), and plutonium trichloride (PuCl 3 ) serves as both the spallation target and the fuel. A 1 GeV proton accelerator with maximum beam current of 4 mA is introduced to compensate the neutrons absorbed by fission products during operation. By adopting an offline fuel cycle scenario based on the multi‐generation reactor evolution, the utilization efficiency of thorium fuel is greatly improved. After four generations of TMSFEA operation, the total net 233 U production is 2774.6 kg, the fission rate fraction of 233 U rises from 0% to 89.3%, the energy fraction of thorium (EFT) can achieve the value of 66.6%, and the utilization efficiency of thorium (UET) can reach 25.9%.