Recent activities on the design of the ITER deuterium/tritium fuel cycle

A Task Force Fuel Cycle has been established at the Forschungszentrum Karlsruhe, aiming to detail the design of the strongly interlinked deuterium/tritium systems of ITER. The ultimate result of the work shall be a complete set of drawings and descriptive documentation to allow manufacture and assembly of the fuel cycle systems by competent industrial partners. However, the responsibility for the performance of the tritium processing systems shall remain with the designers and shall not be passed to the manufacturers. Above and beyond the efforts on R&D and design of the analytical system, the storage and delivery system and the tokamak exhaust processing system of ITER the potential trades off between the isotope separation system and the water detritiation system of ITER are currently under experimental investigation at the Tritium Laboratory Karlsruhe (TLK). One of the aims is to reduce the effluents of ITER along with the ALARA (as low as reasonable achievable) process. The activities of the Task Force Fuel Cycle shall also cover the procurement packages for the cryo-pumps of the ITER torus, of the neutral beam injectors and of the cryostat together with the corresponding backing pump trains, as well as the provision of a powerful leak localization technique. The TIMO facility operated at the Forschungszentrum Karlsruhe will be employed for full scale cryo-pump tests.