Transmutation of Tungsten in Fusion and Fission Nuclear Environments
Transmutation of Tungsten in Fusion and Fission Nuclear Environments
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聚变和裂变核环境中钨的嬗变
DOI：
10.13182/fst13-717
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发表时间：
2014
影响因子：
0.9
通讯作者：
M. Sawan
中科院分区：
文献类型：
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作者：
M. Sawan
摘要测定了钨（W）在磁（MFE）和惯性（IFE）约束聚变系统中用作面向等离子体的装甲时产生的气体和金属嬗变体的数量和类型，并与裂变反应堆中辐照后获得的嬗变体进行了比较。在聚变包层的预期寿命内，产生了高达108%的金属嬗变体。在裂变反应堆中，相同的快中子注量的辐照产生的金属嬗变产物比在聚变系统中要多得多。虽然聚变系统中的主要成分是锇（Re），但锇（Os）是裂变反应堆中的主要嬗变产物。需要评估对W属性的影响。这项工作的结果将有助于指导裂变反应堆的辐照实验，以适当地模拟聚变系统中的条件，通过可能的直接注入辐照样品中的嬗变产物。此外，结果代表了一个必要的输入建模活动，旨在了解性能的预期影响。
Abstract The amount and type of gaseous and metallic transmutants produced in tungsten (W) when used as a plasma-facing armor in magnetic (MFE) and inertial (IFE) confinement fusion systems were determined and compared to those obtained following irradiation in fission reactors. Up to ∽8% metallic transmutants are generated at the expected lifetime of the fusion blanket. Irradiation in fission reactors to the same fast neutron fluence yields a much larger amount of metallic transmutation products than in fusion systems. While the dominant component in fusion systems is rhenium (Re), osmium (Os) is the main transmutation product in fission reactors. The impact on the W properties needs to be assessed. The results of this work will help guide irradiation experiments in fission reactors to properly simulate the conditions in fusion systems by possible direct implantation of transmutation products in irradiated samples. In addition, the results represent a necessary input for modeling activities aimed at understanding the expected effects on properties.