论文部分内容阅读
The content analysis of radioactive waste and radiation dose evaluation is considered as one of the important factors in the reactor facility design. This kind of buildings consists of the concrete for the most part and uses it as the structure and shield of the building. Generally, the concrete has impurities such as cobalt, europium, nickel, and cesium with specific content depending on the production method or manufacturing company. Dominant radioactive nuclides generated from the fundamental components of concrete are considered that it is less contributed to the radiation dose because they are beta decay nuclides in general. Thus, impurities of irradiated concrete in the reactor facilities, are considered occasionally an important evaluation factor for induced activity. In this study, the influence on the activation of impurities in concrete was evaluated from the radiation dose and induced activity calculations. The calculation was evaluated at the bio-shield which is one of the areas with the highest neutron irradiation among the concrete structure in the reactor facility. The results show that radioactive nuclides with gamma decay were produced in these impurities. Moreover, the radiation dose of concrete with impurities was higher than concrete without impurities. The increased radiation dose was quantified through the content of impurities.