作者机构：
[Li, Chao; Ma, Shaohang; Song, Yingming; Zhang, Zehuan] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Song, Yingming] Univ South China, Natl Exemplary Base Int Sci & Tech Collaborat Nuc, Hengyang 421001, Peoples R China.;[Guo, Yaping] China Inst Atom Energy, Beijing 102413, Peoples R China.
通讯机构：
[Yingming Song] S;School of Nuclear Science and Technology, University of South China, Hengyang 421001, China<&wdkj&>National Exemplary Base for International Sci & Tech. Collaboration of Nuclear Energy and Nuclear Safety, University of South China, Hengyang 421001, China
期刊：
Science and Technology of Nuclear Installations,2021年2021:1-15 ISSN：1687-6075
通讯作者：
Song, Yingming
作者机构：
[Wang, Bo; Li, Chao; Mao, Jie; Song, Yingming; Zhang, Zehuan] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;[Song, Yingming] Univ South China, Natl Exemplary Base Int Sci & Technol Collaborat, Hengyang 421001, Hunan, Peoples R China.;[Yuan, Weiwei] Univ South China, Radon Prov Key Lab, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Song, Yingming] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Natl Exemplary Base Int Sci & Technol Collaborat, Hengyang 421001, Hunan, Peoples R China.
摘要：
<jats:p>In the field of radiation protection, the point-kernel code method is a practical tool widely used in the calculation of 3-D radiation field, and the accuracy of the point-kernel integration method strongly depends on the accuracy of the build-up factor. It is well known that calculation of the build-up factor for single-layer shields is composed of single material, but it is very complicated to calculate the build-up factor for multilayer shields (MLBUF). Recently, a novel and high-precision method based on the deep neural network (DNN) for calculating MLBUF has been proposed. In this paper, the novel method is described completely by slab models. Through the study of photon transport in multilayer shields, the parameters that mainly affect the calculation of build-up factor are analyzed. These parameters are trained by DNN as the input vectors, and the build-up factor for multilayer shields is predicted based on the trained DNN. The results predicted by DNN confirm that the method can calculate the build-up factor for multilayer shields quickly and accurately. The method has been preliminarily applicated into a 3-D radiation field calculation software, and it has proved that the method for calculating MLBUF has a broad application prospects in 3-D radiation field calculation.</jats:p>
作者机构：
[张泽寰; 宋英明; 毛婕] School of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;[卢川; 唐松乾; 肖锋; 吕焕文; 杨俊云] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China
作者机构：
[宋英明; 王岩; 付孟婷; 沈格宇] School of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;[肖锋; 吕焕文] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China
作者机构：
[朱志超; 宋英明; 梁烨; 叶凯萱; 邹树梁; 颜佳伟; 张震宇; 张秋楠] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[王宁] Center of Information, Nuclear Power Institute of China, Chengdu, 610213, China
关键词：
核设施退役;辐射场重构;拆除路径优化;功能软件
摘要：
辐射场分布和路径选择是核设施退役过程中影响工作人员吸收剂量的主要因素。针对核设施退役过程中多源项的三维辐射场,采用点核积分的方法进行重构,重构结果与蒙特卡罗程序计算结果吻合很好,验证了点核积分法的可行性。将核退役拆除路径问题抽象为一种类旅行商问题数学模型,构造不同拆除路径下所受外照射剂量对应的剂量矩阵,根据辐射防护ALARA (As Low As Reasonably Achievable)原则,利用遗传算法进行寻优。对于多源项退役拆除实例,计算给出了最优化拆除路径和三维可视化显示,并对优化效果进行了讨论。设计开发了面向核设施退役过程的辐射场重构与拆除路径优化功能软件。
作者机构：
[王珂; 宋英明; 谭至宇; 高庆瑜; 徐宇超] Institute of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[张璐; 杨永伟] Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
作者机构：
[Min, Z.; Xu, Zhenghua] School of Math and Physics, University of South China, Hengyang, 421001, China;[Wen, Shiwei] School of Computer Science and Technology Software School, University of South China, Hengyang, 421001, China;[Song, Yingming] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
通讯机构：
[Xu, Z.] S;School of Math and Physics, China
关键词：
Dose Distribution of Radioactive Source;Mathematical Structural Method;Sparse Grid Data
摘要：
In the case of loss of the source of the radioactive source, the distribution of radiation field needs to be mastered, which is an important basis for radioactive sources search strategy and the evacuation of the radiation area. In this paper, the inversion of the particle field is put forward by a function constructed for solid radioactive sources. we made use of mathematical construction techniques to construct dose function tactfully. An inversion model is established which is based on the dose of nodes in the grid. The dose of the grid lines is restored by the cubic spline interpolation. According to an idea of dose dominance of adjacent point, the function of interior point of grid is structured, which is consistent with the characteristics of the radiation field. During the simulation experiment, the dose of node is obtained by MCNP code based on the Monte Carlo method. It is verified that the dose function is close to the real dose field.
