Modelling of oxidation of W and W-alloys in fusion reactor first walls

聚变反应堆第一壁中钨和钨合金氧化的模拟

• 批准号: 2504963
• 金额: --
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2504963
• 关键词: Modelling; oxidation; alloys; fusion; reactor

Oxidation of tungsten in accident scenarios is a concern for the operation of future fusion reactors. The formation of volatile WO3 in scenarios where W is exposed to air while hot (circa 1500K) due to radioactive decay could have severe implications for the safe operation of a reactor after accidents, particularly since the WO3, which sublimates readily could be radioactive due to being formed from unstable W isotopes (e.g. 187W and 185W). The volatility of WO3 will also be a problem during maintenance and decommissioning, where plasma-facing components will be removed from a fusion reactor, exposed to air, and not subject to the same cooling as during operation. An oxide that forms would pose a hazard to workers if it becomes dust. The aim of this project is to use modelling to develop understanding of how oxidation occurs in W and its alloys, including predictions, validated by experiment, of oxidation rates as a function of temperature that will be crucial to understand for plant operation and maintenance planning.

在意外情况下，钨的氧化是对未来融合反应堆的运行的关注。在Hot（大约1500K）中，由于放射性衰变而暴露于空气的情况下，挥发性WO3的形成可能对事故发生后的反应堆的安全操作产生严重影响，尤其是因为WO3很容易地渗出了放射性，因此由于不稳定的W iSotopes（例如187W和1857W和1857W）而形成。在维护和退役期间，WO3的波动率也将是一个问题，在那里，面向等离子体的组件将从融合反应器中删除，暴露于空气中，并且不受与操作过程中相同的冷却。如果工人变成灰尘，形成的氧化物会对工人构成危害。该项目的目的是利用建模来了解W及其合金中氧化的理解，包括通过实验验证的预测，氧化速率是温度的函数，这对于了解植物的运行和维护计划至关重要。