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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >RADIATION EFFECTS IN MATERIALS FOR ACCELERATOR-DRIVEN NEUTRON TECHNOLOGIES
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RADIATION EFFECTS IN MATERIALS FOR ACCELERATOR-DRIVEN NEUTRON TECHNOLOGIES

机译：加速器驱动的中子技术在材料中的辐射效应

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Accelerator-driven neutron technologies include facilities for neutron scattering research, accelerator transmutation of waste (ATW), and accelerator production of tritium. These systems use spallation neutron sources (SNS's) in which high-energy protons (E=1000-2000 MeV) strike a heavy-metal target, producing spallation neutrons with energies extending up to the incident proton energy. The nature of the spallation process and the codes used to calculate spallation radiation damage are reviewed. Calculations of displacement and helium production in a major target material, tungsten, are described. Displacement cross sections reach about 9000 b for 1600 MeV neutrons or protons. In a simulated high-current-density ATW SNS, displacement production rates are about 0.1 and 1 dpa/d due to the spallation neutrons and incident 1600 MeV protons, respectively, and the He production rates are about 1 and 250 appm He/d, respectively. These damage rates probably represent an upper limit to what can be tolerated. More realistic solid-target SNS's will operate at lower current densities, and the damage rates are likely to be reduced by a factor of 3 or 4 from the values cited above. In any case, however, radiation damage to target and container materials is a major consideration in the design of SNS's. [References: 34]
机译：加速器驱动的中子技术包括用于中子散射研究，加速器废物trans变（ATW）和加速器production生产的设施。这些系统使用散裂中子源（SNS），其中高能质子（E = 1000-2000 MeV）撞击重金属目标，产生散裂中子，其能量扩展到入射质子能量。审查了散裂过程的性质以及用于计算散裂辐射损伤的代码。描述了主要靶材钨中的位移和氦产生量的计算。对于1600 MeV中子或质子，位移截面达到约9000 b。在模拟的高电流密度ATW SNS中，由于散裂中子和入射的1600 MeV质子，位移生产率分别约为0.1 dpa / d和1 dpa / d，He生产率约为1和250 appm He / d，分别。这些损坏率可能代表可以容忍的上限。更现实的固体目标SNS将在较低的电流密度下运行，并且损坏率可能会从上述值降低3或4倍。但是，无论如何，对目标和容器材料的辐射损伤是SNS设计中的主要考虑因素。 [参考：34]

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