Monte carlo simulation of a radiation shielding carrier for proton-beam-irradiated sample

Two target rooms, TR23 and TR103, will be constructed for the utilization of the 20-MeV and the 100-MeV linear proton beams, and hot cells will be installed at these target rooms to handle samples that are highly activated by proton beam bombardment. The sample transport methods depend on the sample size because of the limited size of the penetration hole between the target room and the treatment room. For small samples that can be transported through the penetration hole, we can use a remotely-operated sample transport system, but for large-size samples will have to be moved through the shielding door opening, so a lead-shielded carrier has to be used for radiation protection. The carrier can be used to transport the samples from hot cell to another radiation worker’s areas in the accelerator building. In this research, we designed a lead-shielded carrier and evaluated its radiation shielding capability for the expected samples and their radioactivities by using Monte Carlo code simulations. We also calculated the shielding capability of the hot cell.