Effect of radiation on corrosiveness of gas coolant

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Radiation rays will significantly change the chemical stability of the gas coolant, thereby aggravating the corrosion of reactor structural materials. The core impact mechanism is as follows: Triggering gas radiolysis reaction Ionizing radiation will trigger ion-molecule reactions in the gas-cooled reactor coolant (such as carbon dioxide). The originally stable pure CO₂ will generate a large number of transient active species. These products will directly erode the graphite moderator block, causing the structure to weaken. Accelerate the material corrosion process. In a radiation environment, the decomposition products of the gas coolant will react with structural materials.: After CO₂ radiolysis at high temperatures, it will react with graphite to generate carbon monoxide. At the same time, stainless steel parts are prone to carburization corrosion problems, which greatly increases the material corrosion rate. Engineering countermeasures can introduce special corrosion inhibitors into the coolant system to reduce the generation of radiolytic active species, thereby reducing corrosion damage to structural materials and extending the service life of the gas-cooled reactor.