Abstract
The Active Gas Handling System (AGHS) of JET was designed to provide a closed loop for the supply and recovery of tritium during torus operations. The AGHS carried out this function during the 1997 tritium experiment DTE1 and provided detritiation of the torus ventilation air during the subsequent Remote Tile Exchange (RTE). At the end of the RTE approximately 3.6 g of tritium remained within the torus and although only D-D operations were to be carried out during the experimental campaign, the AGHS was still required to continue to support the machine operations. At the end of this experimental campaign (May 1999) the torus and neutral beam boxes were vented to atmosphere in order to install an inboard pellet injector track. Again the Exhaust Detritiation (ED) system was used to detritiate the ventilation air from the machine.
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