主催: The Japan Society of Mechanical Engineers
会議名: 第30回 原子力工学国際会議（ICONE30）
開催日: 2023/05/21 - 2023/05/26
As stated in Management of Disused Sealed Radioactive Sources, DSRS management schemes typically include transferring to other authorized users or returning them to the manufacturers/original suppliers or sending them to a licensed storage operator or disposal operator for long-term storage, disposal, reuse, and recycling. Near-surface disposal, borehole disposal, and geological disposal are all choices.
The purpose of this study is to choose the preferred disposal options for DSRS through management options comparison and prove the safety of the preferred disposal options for DSRS through safety assessment implementation on the preferred disposal option to protect individuals, society, and the environment from radiation exposure. In line with the objectives, Borehole Disposal System is suggested after careful analysis of other disposal systems through management options. The safety assessment of DSRS disposal is carried out with the development of two scenarios that are the Basic design with time scenario and the radionuclide release to the biosphere as a defect scenario. The dose constraint of 0.3msv/yr is used as a benchmark for results comparison with a clear definition of the site characteristics, the inventory, the mathematical models for each scenario, and the disposal facility structure. The software Ecolego which is based on Matlab and Simulink is used to perform the safety analysis.
The results for the safety analysis after critical simulation with the software are mainly focused on the dose limit for humans, the maximum dose released from the radionuclides is 0.063mSv/yr for the basic design with time and 0.066mSv/yr for the radionuclides released to the Biosphere scenarios.
This report indicates that the inventory of DSRS can be safely and permanently disposed of using BDS.
