Cold-crucible induction melting (CCIM) technology has been intensively studied as an advanced vitrification process for the immobilization of highly radioactive waste. This technology uses high-frequency induction to melt a glass matrix and waste, while the outer surface of the crucible is water-cooled, resulting in the formation of a frozen glass layer (skull). In this study, for the fabrication of borosilicate glass waste form, CCIM operation test with 60 kg of glass per batch was conducted using surrogate wastes composed of Cs, Sr, and Nd as a representative of highly radioactive nuclides generated during spent nuclear fuel management. A 60 kg-scale glass waste form was successfully fabricated through melting and draining processes using a CCIM system, and its physicochemical properties were analyzed. In particular, to enhance the controllability and reliability of the draining process, an air-cooling drain control method that can control draining through air-cooling near drain holes was developed, and its validity for draining control was verified. The method can offer controllability on various draining processes, such as molten salt or molten metal draining processes, and can be applied to a process requiring high throughput draining.

冷坩埚感应熔炼 (CCIM) 技术作为一种先进的玻璃化工艺用于固定高放射性废物，已被深入研究。该技术利用高频感应熔化玻璃基质和废料，同时坩埚外表面水冷，从而形成冷冻玻璃层（颅骨）。在这项研究中，对于硼硅酸盐玻璃废料形式的制造，使用由 Cs、Sr 和 Nd 组成的替代废料作为乏核燃料管理过程中产生的高放射性核素的代表，进行了每批 60 公斤玻璃的 CCIM 操作试验。使用 CCIM 系统通过熔化和排水过程成功制造了 60 公斤级的玻璃废料形式，并对其物理化学性质进行了分析。特别是，为提高排水过程的可控性和可靠性，开发了一种通过靠近排水孔的空冷控制排水的空冷排水控制方法，并验证了其对排水控制的有效性。该方法可以对各种排液过程提供可控性，例如熔融盐或熔融金属排液过程，并且可以应用于需要高产量排液的工艺。