An estimation of radiological hazards of current tokamak reactor concepts

The radiological hazards of an Advanced Reactor Innovation and Evaluation Study (ARIES)-type tokamak reactor design is studied by utilizing the computer codes TART, ORLIB FORIG, and FUSEDOSE. In an accident scenario, including the maximum plausible release fraction gives a realistic estimation of the doses. The ARIES-type reactor design produces a critical dose below the 200 rem threshold. However, the chronic dose exceeds the threshold of 25 rem. Most of the radioactivities and doses come from the neutron multiplier blanket module. Remote maintenance is required to handle the reactor components due to their high-contact dose rates. All the reactor components are qualified for shallow burial under the 10CFR61 guidelines. In comparison with the ESECOM (Senior Committee on Environmental, Safety, and Economic Aspects of Magnetic Fusion Energy) studies, the ARIES-type tokamak design is compatible with the better deuterium-tritium D-T-burning fusion reactor designs, and is superior to fission reactors in environmental and safety aspects