六种不同混凝土在质子治疗机房屏蔽性能研究

doi:10.13491/j.issn.1004-714X.2022.02.002

中国辐射卫生

2022, Vol. 31

Issue (2): 144-148 DOI: 10.13491/j.issn.1004-714X.2022.02.002

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六种不同混凝土在质子治疗机房屏蔽性能研究

许志强, 耿继武, 贾育新, 张灶钦, 王美霞

广东省职业病防治院，广东广州 510300

Shielding performance of six different types of concrete in proton therapy room

XU Zhiqiang, GENG Jiwu, JIA Yuxin, ZHANG Zaoqin, WANG Meixia

Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangzhou 510300 China

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摘要目的研究6种不同混凝土为主墙时，230 MeV质子治疗室主屏蔽体外的剂量水平，获取6种不同混凝土的屏蔽性能。方法采用FLUKA程序构建计算模型，将不同混凝土组成引入FLUKA程序，模拟230 MeV质子束流照射情况下关注点周围剂量当量率随混凝土厚度的变化，拟合6种混凝土透射曲线，得到6种不同混凝土的屏蔽性能参数。结果 230 MeV质子束90°方向照射水靶时，混凝土厚度超过40 cm后，6种不同的混凝土对质子束的衰减均呈指数衰减，拟合的衰减曲线R² > 0.99，普通混凝土、重晶石混凝土、磁铁矿混凝土、褐铁矿混凝土、磷铁矿混凝土和铁硅酸盐混凝土的线衰减系数分别为：0.014 8 cm⁻¹、0.017 2 cm⁻¹、0.019 6 cm⁻¹、0.021 9 cm⁻¹、0.025 6 cm⁻¹、0.029 0 cm⁻¹。结论混凝土材料中的元素组成和占比在很大程度上直接影响着混凝土对于质子束的屏蔽能力，6种不同的混凝土对质子的屏蔽性能相差较大。因此在质子治疗室屏蔽材料的选取时应该结合混凝土的材料组成和屏蔽性能、施工难易程度及工程成本等诸多因素综合考量。

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	许志强
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关键词 ：质子束, 混凝土屏蔽性能, FLUKA程序

收稿日期: 2021-09-16

X591

基金资助:广东省医学科研基金（A2021250）广东省职业病防治重点实验室（2017B030314152）

作者简介: 许志强（1988—），男，湖南衡南人，工程师，从事放射防护工作。E-mail：1079220561@qq.com

引用本文:

许志强, 耿继武, 贾育新, 张灶钦, 王美霞. 六种不同混凝土在质子治疗机房屏蔽性能研究[J]. 中国辐射卫生, 2022, 31(2): 144-148.
XU Zhiqiang, GENG Jiwu, JIA Yuxin, ZHANG Zaoqin, WANG Meixia. Shielding performance of six different types of concrete in proton therapy room. , 2022, 31(2): 144-148.

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http://www.zgfsws.com/CN/10.13491/j.issn.1004-714X.2022.02.002 或 http://www.zgfsws.com/CN/Y2022/V31/I2/144

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