Characterizing Irradiation Degradation in Nuclear Power Systems: Eliminating Artefacts

表征核电系统中的辐照退化：消除伪影

• 批准号: RTI-2022-00450
• 负责人: Daymond, Mark
• 金额: $ 9.35万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=741913
• 关键词: Characterizing; Irradiation; Degradation; Nuclear; Power

Two PIs at Queen's are seeking to to develop a mechanistic understanding of irradiation effects on corrosion and stress corrosion cracking. Their studies are made possible by the presence of the RMTL facility (www.rmtl.ca); this facility make Queen's one of the few universities in the world capable of introducing significant levels of irradiation damage into materials. The proton accelerator at RMTL allows us to generate damage directly comparable to the damage found in high radiation environments of practical engineering concern, for example inside a nuclear reactor or in extraterrestrial space. The changes in microstructure and microchemistry caused by irradiation alter subsequent corrosion and corrosion-cracking phenomena. Further, many corrosion or corrosion-cracking reactions occur away from air (e.g. in water). Once removed from the corrosive environment, any subsequent exposure to air can introduce oxidation artifacts that prevent subsequent Scanning Electron Microscopy (SEM) analysis, which we need to use to assist in our interpretations of local mechanisms. The co-applicants are therefore requesting funding to purchase an inert gas glovebox and transfer system that allows preparation of samples and subsequent transfer to an SEM while maintaining an inert environment. Since the samples will have been irradiated and hence radioactive, this inert system will be located within the RMTL facility, a multi-user facility, and hence will be available for all RMTL users.

皇后学院的两名PI正在寻求对辐照对腐蚀和应力腐蚀开裂影响的机理理解。他们的研究是由RMTL设施（www.rmtl.ca）的存在成为可能;该设施使皇后大学成为世界上为数不多的能够将辐射损伤引入材料的大学之一。RMTL的质子加速器使我们能够直接产生与实际工程关注的高辐射环境中发现的损害相当的损害，例如核反应堆内或地外太空。辐照引起的微观结构和微观化学变化改变了随后的腐蚀和腐蚀开裂现象。此外，许多腐蚀或腐蚀开裂反应远离空气（例如在水中）发生。一旦从腐蚀性环境中移除，任何后续暴露于空气中都会引入氧化伪影，从而阻止后续的扫描电子显微镜（SEM）分析，我们需要使用SEM来帮助我们解释局部机制。因此，共同申请人要求提供资金，以购买惰性气体手套箱和转移系统，以便在保持惰性环境的同时制备样品并随后转移到SEM。由于样品将经过辐照，因此具有放射性，该惰性系统将位于RMTL设施内，这是一个多用户设施，因此将可供所有RMTL用户使用。