Presentation Information
[2B14]Dose Comparison Study for Various Facility Design Proposals in Near Surface Disposal
*Takashi Sekiguchi1, Tran Thanh Hai1, Fujitaka Kato2, Taichi Saito3, Kunihiro Nakai3, Naoyuki Tamura4 (1. TODA, 2. JANUS, 3. JGC, 4. JNFL)
Keywords:
Low-Level Radioactive Waste,Near Surface Disposal,Pit Type,Monolith Type,Silo Type,Caisson Type,Tunnel type,Multiple Design Proposals,Facility Forms,Dose Comparison
Low-level radioactive waste generated during the operation of nuclear power plants has been disposed of in near surface pits. However, in order to reduce the dose as much as possible within feasible limits, it is important not only to consider pit-type designs but also to compare and review multiple design options and identify those with superior movement suppression. Therefore, five conventional facility types-the pit-type single-layer, pit-type two-layer, monolith, silo-type (caisson), and tunnel-type—were selected, and the characteristics of each facility were summarized before conducting a dose comparison. There was no significant difference in the release rates of radionuclides, but the tunnel-type, which is installed at a greater depth and only leaks into the bedrock, indicated the possibility for dose reduction.