Abstract Neutron activation is an unavoidable process in large scale fusion devices operating with deuterium and tritium fuels. Neutron activation leads to the production of radioactive materials. Activated materials can generate heat and ionizing radiation in their environment. Consequently, values of activation characteristics need to be determined in order to ensure safety and performance of the fusion devices. In this work activity and decay heat inventories for the DEMOnstration power plant (DEMO) 2015 baseline model divertor were calculated. Operation scenario of 1898 days was considered as well as three different breeder blanket configurations of DEMO reactor: single-module segmentation water cooled lithium lead (WCLL SMS), multi-module segmentation water cooled lithium lead (WCLL MMS) and helium cooled pebble bed (HCPB). Divertor model is divided into 62 segments and 4 layers with different material compositions. Neutron transport and activation inventory calculations were performed respectively with MCNP and FISPACT codes. In addition to activation calculation results, divertor radionuclide analysis is also presented in this work.

中文翻译：

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欧洲 DEMO 偏滤器在不同育种毯分割方面的激活分析

摘要 中子活化是使用氘和氚燃料的大型聚变装置中不可避免的过程。中子活化导致放射性物质的产生。活化材料会在其环境中产生热量和电离辐射。因此，需要确定激活特性的值以确保聚变装置的安全性和性能。在这项工作活动中，计算了 DEMOnstration 发电厂 (DEMO) 2015 基线模型偏滤器的衰变热库存。考虑了 1898 天的运行场景以及 DEMO 反应堆的三种不同增殖毯配置：单模块分段水冷锂铅（WCLL SMS）、多模块分段水冷锂铅（WCLL MMS）和氦冷球床（ HCPB）。导流板模型分为62段4层，材料成分不同。中子输运和活化存量计算分别使用 MCNP 和 FISPACT 代码进行。除了活化计算结果外，这项工作还介绍了偏滤器放射性核素分析。