摘要
本研究基于新型泳池式研究堆设计方案,开展了硼中子俘获治疗(BNCT)能谱可变中子束流装置的初步方案设计。根据新型泳池堆堆芯结构,采用屏蔽体及准直器组合方式,对BNCT的中子慢化层、热中子吸收层、伽马屏蔽层以及中子准直器进行了分析计算及优化,在不增加中子引出束流孔道数量的前提下,实现了超热中子及热中子BNCT束流的切换,通过理论计算分析确定了两种装置的中子束流特性,超热/热中子通量密度、单位快中子剂量、单位光子剂量、热中子通量占比等参数均符合IAEA-TECDOC-1223报告的BNCT推荐参考标准,可用于不同能量需求的硼中子俘获治疗,为新型多功能泳池堆的应用及推广提供了技术支持。
Based on the design scheme of a new-type swimming pool research reactor,this paper conducts preliminary design for a variable-energy neutron beam facility for boron neutron capture therapy(BNCT).Combining the shielding body and collimator,the neutron moderation layer,thermal neutron absorption layer,gamma shielding layer,and neutron collimator for BNCT are analyzed,calculated,and optimized according to the core structure of the new-type swimming pool reactor.Without increasing the number of neutron extraction beam channels,the switching between epithermal neutron and thermal neutron BNCT beams is achieved.Through theoretical calculations and analysis,the neutron beam characteristics of the two devices are determined.Parameters such as epithermal/thermal neutron flux density,fast neutron dose per unit,photon dose per unit,and the proportion of thermal neutron flux all meet the BNCT recommended reference standards in the IAEA-TECDOC-1223 report,which can be used for boron neutron capture therapy with different energy requirements.This lays a technical foundation for the application and promotion of the newtype multifunctional swimming pool reactor.
作者
梁松
陈晓亮
左亚杰
徐健平
LIANG Song;CHEN Xiaoliang;ZUO Yajie;XU Jianping(China Atomic Energy Agency,Beijing 100048,China;China Institute of Atomic Energy,Beijing 102413,China)
出处
《同位素》
CAS
2024年第3期245-253,共9页
Journal of Isotopes
