논문 상세보기
Review
p.266
In nuclear decommissioning projects, past and present projects in the world, an important area to be managed is waste management. The management of waste should be done with various aspects of consideration in mind from the moment it occurs from the cutting and dismantling of Systems, Structures, and Components (SSCs). Therefore, this study aims to discuss the disposition considerations for the efficient management of low and very low level waste that is expected to be generated in large quantities and to examine its applicability to domestic nuclear facilities. As for waste management, radioactive wastes begin to be generated when SSCs are dismantled, so waste management should be carried out as a result of dismantling activities. In addition, the waste is stored in the final disposal container and transferred to the storage or disposable facilities. In order to store in the final disposal container or transfer container, it will have to be classified by radioactive level. From the perspective of waste classification, wastes below the low level can be divided into low levels, very low levels, and clearance in Korea. Therefore, as an important point of waste management, when SSCs are dismantled, the work process must be carried out until the final disposal in accordance with the disposition strategy based on the waste classification. As a disposition strategy, the process presented by the IAEA can be referred. The materials to be dismantled for the first time are largely divided into radioactive and suspected radioactive materials. After going through the dismantling process, three criteria are considered to satisfy the disposition option: unconditional release criterion, conditional criterion, and radioactive waste. The types of waste below the final low level are classified into two types as unconditional, two types as conditional, and low and very low levels. In this study, six disposition options are reviewed, including unconditioned reuse and disposal, conditional reuse and disposal, and disposal of VLLW and VLW. Options for radioactive waste may be subject to operational criteria and may need to be supplemented in terms of the acceptance criteria in the repository. In the case of the conditional option, the clearance criterion can be applied, but considering the decommissioning characteristics, it is an option that can be used for nuclear industry, and specific reuse scenarios should be supplemented through discussions with the regulatory agency. In addition, it seems that the unconditional option needs to establish a corresponding criterion.
