title: Individual dose due to radioactivity accidental release from fusion reactor.
abstract: As an important index shaping the design of fusion safety system, evaluation of public radiation consequences have risen as a hot topic on the way to develop fusion energy. In this work, the comprehensive public early dose was evaluated due to unit gram tritium (HT/HTO), activated dust, activated corrosion products (ACPs) and activated gases accidental release from ITER like fusion reactor. Meanwhile, considering that we cannot completely eliminate the occurrence likelihood of multi-failure of vacuum vessel and tokamak building, we conservatively evaluated the public radiation consequences and environment restoration after the worst hypothetical accident preliminarily. The comparison results show early dose of different unit radioactivity release under different conditions. After further performing the radiation consequences, we find it possible that the hypothetical accident for ITER like fusion reactor would result in a level 6 accident according to INES, not appear level 7 like Chernobyl or Fukushima accidents. And from the point of environment restoration, we need at least 69 years for case 1 (1kg HTO and 1000kg dust release) and 34-52years for case 2 (1kg HTO and 10kg-100kg dust release) to wait the contaminated zone drop below the general public safety limit (1mSv per year) before it is suitable for human habitation.
authors.affiliation: Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, 230031, China; University of Science and Technology of China, Hefei, Anhui, 230027, China.
authors.forename: Baojie
authors.initials: B
authors.lastname: Nie
authors.affiliation: Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. Electronic address: muyi.ni@fds.org.cn.
authors.forename: Muyi
authors.initials: M
authors.lastname: Ni
authors.affiliation: Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, 230031, China; University of Science and Technology of China, Hefei, Anhui, 230027, China.
authors.forename: Shiping
authors.initials: S
authors.lastname: Wei
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis / Q000633:toxicity*; D000465:Algorithms; D004391:Dust; D052918:Environmental Restoration and Remediation; D005740:Gases / Q000633:toxicity; D006801:Humans; D009681:Nuclear Fusion; D055848:Nuclear Power Plants; D018788:Radioactive Hazard Release; D012449:Safety; D014316:Tritium / Q000633:toxicity
chemical_list: D000396:Air Pollutants, Radioactive; D004391:Dust; D005740:Gases; D014316:Tritium
keywords: Dose; Dust; Environment restoration; Fusion reactor; Tritium