Maintenance Method and its Critical Issues for a Fast-IgnitionLaser Fusion Reactor based on a Dry Wall Chamber

摘要

The neutronics analysis has been carried out for feasibility study of the FALCON-Drnconcept by Monte Carlo N-paticle transport code (MCNP), in order to inspect the coolingrnperformance of in-vessel and ex-vessel components, and a connection pipe between VacuumrnVessel and reactor room. The nuclear heating rate in the Vacuum Vessel was at the same levelrnas that of NBI duct of the ITER. The temperature of the connection pipe was found to be 345℃,rnwhich was smaller than the melting point of structure materials (F82H). Moreover, thernradiation damage of the final optics was also investigated. We propose a sliding changerrnconcept for replacement. This method could be adapted for the replacement of one FPY cyclernin the final optics system.