Preliminary evaluation for domestic applicability of deep borehole disposal technology

As an alternative to the deep geological disposal technology which is considered as a reference concept and currently under development, the applicability and feasibility of deep borehole disposal technology to dispose of high - level waste at the depth of 3 to 5 km that is more stable in geological and geo-hydrological conditions are intended to be evaluated preliminarily. To analyze the applicability of deep borehole disposal system, we analyzed the characteristics of bedrock distribution in domestic area and evaluated the deep borehole drilling technology. Based on the results of the analysis, the design criteria and requirements of the deep borehole disposal system were established, and the preliminary reference concept of the deep borehole disposal system which meet the criteria and requirements was developed. The preliminary evaluation of the applicability of the deep borehole disposal system was carried out by carrying out the performance and safety assessment for the developed preliminary deep borehole disposal system. These results will be used as input data for the government R&D program for the development of a deep borehole disposal system as an alternative concept to the deep geological disposal which is considered as the present reference concept. And they can be used to establish the disposal concept for the waste with long-lived nuclides such as Tc-99, I-129 waste generated from spent fuel recycling process. Also, they can be used to draw the disposal plan for the wastes that can not be accommodated in the Gyeongju low & intermediate level wastes disposal repository. In addition, they can be used as an engineering data for establishment of national policy on spent fuel management, and they will be used as information necessary for the stakeholder who are interested in the deep borehole disposal technology