Safety and environmental analysis of the compact ignition tokamak

The Compact Ignition Tokamak (CIT) will use tritium as a fuel and produce sufficient high energy neutrons to activate surrounding gases and structures. This paper discusses features that have been incorporated into the design to enhance safety and reviews the safety and environmental analyses performed for the CIT. Because of the proposed location near populated areas, radioactive inventories have been kept low to limit operational and accidental releases of radioactivity. Radioactive inventories include tritium in the fueling cycle, activated nitrogen in the magnet cooling system, activated gases in the test cell, and activated solids. Features have been incorporated into the design of CIT to prevent or mitigate releases. Operational releases have been estimated and their effect on the environment calculated. Accident scenarios have been identified using a risk based approach that considers the probability as well as the consequence of the accidents. Accidents caused by equipment failures and shipping have been analyzed. Doses to the public have been calculated based on atmospheric dispersion measurements conducted at the Princeton site. These results are used to assess the adequacy of the design to meet safety and environmental objectives and requirements. 10 refs., 2 figs., 3 tabs