基于中国辐射虚拟人Rad-HUMAN的中子剂量转换系数及分析

发布时间：2019-07-10 12:15

【摘要】：中子通过物质时具有很强的穿透能力,对人体产生的危险较相同剂量的X射线、γ射线更为严重,因此中子的辐射防护非常重要。目前基于不同体模的中子剂量转换系数的研究是国际上辐射防护领域的一大研究热点。本文利用FDS团队自主构建的中国辐射虚拟人Rad-HUMAN及蒙特卡罗输运程序,模拟不同能量、不同照射方式下单能中子在人体内的输运,得到了一系列器官的中子剂量转换系数和有效剂量值,并将结果与ICRP 74号、116号出版物进行了比较分析。对于某些器官在某些照射条件下,三者结果较一致;但也发现在某些照射条件下,中国辐射虚拟人Rad-HUMAN得到的结果与ICRP 74和ICRP 116号出版物推荐值存在较大差异。该结果对于分析中国人个体与ICRP参考人之间中子剂量转换系数的差异具有重要意义。
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[Abstract]:Neutrons have a strong penetration ability when passing through matter, and the danger to human body is more serious than that of X-rays and gamma rays of the same dose, so the radiation protection of neutrons is very important. At present, the study of neutron dose conversion coefficient based on different phantom is a hot research topic in the field of radiation protection in the world. In this paper, the Chinese radiation virtual human Rad-HUMAN and Monte Carlo transport program independently constructed by FDS team are used to simulate the transport of ordered energy neutrons in human body with different energy and different irradiation modes. The neutron dose conversion coefficients and effective dose values of a series of organs are obtained, and the results are compared with ICRP 74 publication No. 116. For some organs under some irradiation conditions, the results are consistent, but it is also found that under some irradiation conditions, the results obtained by Chinese radiation virtual human Rad-HUMAN are quite different from those recommended by ICRP 74 and ICRP 116. The results are of great significance for analyzing the difference of neutron dose conversion coefficient between Chinese individuals and ICRP reference people.
【作者单位】：中国科学院核能安全技术研究所中国科学院中子输运理论与辐射安全重点实验室;
【基金】：中国科学院战略性先导科技专项资助项目(XDA03040000) 国家自然科学基金资助项目(91026004,11305205) 973计划资助项目(2014GB112001)
【分类号】：R144

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