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：位于万向管和压力管之间的间隔器。该项目旨在评估辐射引起的间隔材料的降解，以及发展对工业相关镍基合金辐射损伤的基本科学理解。本项目的重点将是研究氦泡诱导晶界空化在辐照材料中的影响，无论是使用高能离子还是中子辐照。短期和长期结果直接适用于了解老化对CANDU垫片完整性的影响。这里应用于离子辐照材料的技术和分析方法将有助于对加拿大核实验室（CNL）正在并行研究的中子辐照材料的测量结果进行表征和解释。

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.