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.

事故情况下钨的氧化是未来聚变反应堆运行的一个问题。在 W 由于放射性衰变而在热时（约 1500K）暴露在空气中时，挥发性 WO3 的形成可能会对事故后反应堆的安全运行产生严重影响，特别是因为容易升华的 WO3 可能具有放射性，因为由不稳定的 W 同位素（例如 187W 和 185W）形成。 WO3 的挥发性在维护和退役期间也将是一个问题，其中面向等离子体的部件将从聚变反应堆中移除，暴露在空气中，并且不会受到与运行期间相同的冷却。形成的氧化物如果变成灰尘会对工人造成危险。该项目的目的是利用建模来加深对钨及其合金中氧化如何发生的理解，包括通过实验验证氧化速率与温度的函数关系的预测，这对于理解工厂的运行和维护规划至关重要。