Individual dose due to radioactivity accidental release from fusion reactor

JOURNAL OF HAZARDOUS MATERIALS

卷:327

Article

Nie, Baojie^1,2  Ni, Muyi¹  Wei, Shiping^1,2 

[1] Chinese Acad Sci, Inst Nucl Energy Safety Technol, Key Lab Neutron & Radiat Safety, Hefei 230031, Anhui, Peoples R China

[2] Univ Sci & Technol China, Hefei 230027, Anhui, Peoples R China

关键词: Tritium;    Dust;    Dose;    Fusion reactor;    Environment restoration;   

DOI  :  10.1016/j.jhazmat.2016.12.018

来源: Elsevier

【 摘 要 】

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 occurrehce 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(1 kg HTO and 1000 kg dust release) and 34-52 years for case 2 (1 kg HTO and 10kg-100 kg dust release) to wait the contaminated zone drop below the general public safety limit (1mSv per year) before it is suitable for human habitation. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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