Thread Content
Combining the background information such as the effects and typical cases of radiation damage repair technology discussed previously, the current application of this type of technology still faces multi-dimensional core challenges.: Extreme Environment Adaptation Difficulties Real-life service scenarios such as nuclear reactor cores are high-temperature, high-pressure, and strong-irradiation multi-field coupling environments. Most of the existing repair technologies can only be carried out under simplified offline conditions, and are difficult to directly implement stably under in-situ working conditions, and cannot adapt to the complex service environment of real components. Irreversible defects such as helium bubbles, large-sized cavities, and stable phase segregation caused by microscopic precision control of bottleneck irradiation are difficult to completely eliminate through existing technologies. At the same time, secondary damage such as metal grain coarsening and precipitate phase dissolution can easily occur during the repair process, making it difficult to accurately control the microstructure state after repair. In-situ characterization and monitoring During the short board repair process, there is a lack of in-situ characterization methods with nanometer-level spatiotemporal resolution. It is impossible to track the defect evolution process in real time, and it is difficult to accurately control the repair process parameters. It is prone to insufficient repair or excessive repair. The large nuclear-grade metal components of engineered landing barriers are bulky. The energy uniformity of existing high-efficiency repair technologies such as pulse current cannot cover large-sized components. At the same time, there is a lack of supporting safety assessment standards, making it difficult to be directly applied to key engineering scenarios such as nuclear power plants. The multi-scale simulation accuracy is insufficient. Existing multi-scale simulation models of radiation damage evolution are difficult to accurately predict the repair effect under complex working conditions, and cannot provide reliable theoretical guidance for engineered repair plans.