[2D20-23] Waste Disposal

[2D20] Technical trend and issues of deep borehole disposal as an alternative disposal option

*Shigeru Koo¹, Masaaki Yamaguchi², Hitoshi Makino², Terumitsu Tsuchiya³, Yoshitoki Kanzaki⁴ (1. NESI, 2. JAEA, 3. TAISEI, 4. QJ Science)

Keywords:Alternative disposal options, Deep borehole disposal, Drilling technology, Casing, Geological-environmental conditions

A deep borehole disposal has been considered as a disposal option and various technical studies in various countries have been reported in recent years. This study summarizes the main points for discussion on deep borehole disposal and the technical issues for its implementation through research of and comparison among multiple examples in other countries. In addition, we will try to examine the points and issues of deep borehole disposal more specifically through, for example, case studies on the drilling of deep boreholes and the maintenance of the borehole walls, which are one of the important prerequisites for the implementation of deep borehole disposal.