Investigation of irradiated spacer materials (X750 and Zr-Nb-Cu)

该项目的目的是了解CANDU核电反应堆中关键机械部件之一的脆化行为：位于排管和压力管之间的间隔件。该项目旨在评估垫片材料的辐射诱导降解，并对工业相关镍基合金的辐射损伤进行基础科学理解。本计画的重点将是探讨氦泡在辐照材料中所引发的晶粒间界空蚀效应，不论是使用高能离子或是中子辐照。短期和长期的结果是直接适用于了解老化对CANDU间隔完整性的影响。这里应用到离子辐照材料的技术和分析方法将有助于在加拿大核实验室（CNL）平行研究的中子辐照材料的测量的表征和解释。 实验结果也将被用来支持图像模拟模型，建立辐照诱导的纳米空洞和其诱导的机械退化之间的内在联系。此外，由于这个项目，我们将为新一代核工程师提供高水平的HQP培训。

The purpose of this project is to develop an understanding of the embrittlement behaviour of one of the key mechanical components in a CANDU nuclear power reactor: the spacer, which is located between the calandria tube and the pressure tube. This project is aiming at evaluating radiation induced degradation of spacer material as well as developing a basic science understanding of irradiation damage in an industrially relevant Ni based alloy. The focus of this project will be to examine the effects of helium bubble induced cavitation of grain boundaries in irradiated materials, either using energetic ions or neutron irradiation. The short and long term results are directly applicable to understanding the effect of aging on the integrity of CANDU spacers. The techniques and analysis methods applied here to ion irradiated materials will help in the characterization and interpretation of measurements on neutron irradiated materials being studied at the Canadian Nuclear Laboratory (CNL) in parallel. The experimental results will also be used to support the image simulation models, to establish the intrinsic relationship between irradiation induced nano cavities and its induced mechanical degradation. In addition, thanks to this project, we will provide a high level of HQP training for the new generation of nuclear engineers.