化学酸素沃素レーザー (Chemical Oxygen-Iodine Laser: COIL) の原子炉解体への応用

抄録

Conceptual designs of a Chemical Oxygen-Iodine Laser (COIL) facility for decommissioning and dismantlement (D&D) of nuclear facility is proposed. The requisite output power and beam quality was determined based on our preliminary experiments of nonmetal material processing. Assuming the laser power of 30kW it is derived that the begun quality of M²=36 is required to cut a biological shield wall (1000mm thickness) of a nuclear power plant at a cutting speed of 10mm/min. Then the requisite specification of an optical fiber to deliver the laser is calculated. The mass flow and heat balance of proposed facility is calculated based on our recent COIL studies. With the high-pressure subsonic mode, the vacuum pump size is minimized compared to the supersonic operation. Finally, the size of facility is estimated assuming two-hour continuous operation. It is revealed that such a system can be packed in five railway containers (6058mm×2438mm×2438mm).