Are tungsten-based nuclear fusion components truly invisible to x-ray inspection?
Are tungsten-based nuclear fusion components truly invisible to x-ray inspection?
复制标题
X射线检查真的看不到钨基核聚变元件吗？
DOI：
10.1088/1741-4326/ac4efe
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发表时间：
2022
期刊：
影响因子：
3.3
通讯作者：
Minniti T
中科院分区：
文献类型：
--
作者：
Minniti T
检测反应堆部件中不需要的体积缺陷的能力可能会影响聚变发电厂的安全和可靠性，并改变反应堆的预期寿命和性能。对于关键的反应堆部件，如面向等离子体的部件(PFC)，更是如此，这些部件必须经受住由于等离子体轰击、辐射和核加热的组合而具有挑战性的容器内条件。在将这些部件安装到核聚变反应堆之前，需要对其结构完整性进行非破坏性评估。到目前为止，工业X射线照相术和层析照相术还没有被用于无损检测聚变组件，因为它们缺乏对致密材料的穿透力，例如通常用于制造PFCs的钨。然而，为了扭转这一坚定的信念，我们首次证明了在演示偏滤器模型上利用MeV能量范围X射线层析成像非破坏性地评估体积缺陷的可行性。作者认为，该技术可以很容易地推广应用于大型聚变部件的检验，并对当前和未来核反应堆聚变部件鉴定所遵循的程序产生积极影响。
The ability to detect undesired volumetric defects in reactor components could affect the safety and reliability of a fusion power plant and change the expected lifetime and performance of the reactor. This is even more true for critical reactor parts like plasma-facing components (PFCs) which have to withstand challenging in-vessel conditions due to a combination of plasma bombardment, radiation, and nuclear heating. The structural integrity of these components prior to their installation in a nuclear fusion reactor needs to be assessed non-destructively. Until now, industrial x-ray radiography and tomography have not been used to non-destructively inspect fusion components due to their lack of penetration power into dense material such as tungsten which is often used to manufacture PFCs. However, aiming to revert this consolidated belief, we have demonstrated for the first time the feasibility of assessing volumetric defects non-destructively on DEMO divertor mock-up by means of MeV energy range x-ray tomography. The authors believe that the application of this technology could be easily extended for inspecting large fusion components and positively impact procedures to be followed in the qualification of fusion components for current and future nuclear reactors.