Development of key fusion technologies at JET

The recent operational phase in JET in which DT fuel was used (DTE1) resulted in record breaking fusion performance. In addition to important contributions in plasma physics, the JET Team also made major advances in demonstrating the viability of some of the key technologies required for the realization of future fusion power. Two of the most important technological areas which have been successfully demonstrated in JET are the ITER scale tritium processing plant and the exchange of the divertor and maintenance of the interior of JET by totally remote means. The experiment also provided the first data on tritium retention and co-deposition in a diverted tokamak. Of the 35 g of tritium injected into the JET torus, about 6 g remained in the tokamak, residing mainly on cool surfaces at the inboard divertor side. The precise, safe and timely execution of the remote handling shutdown proved that the design, function, performance and operational methodology of the remote handling equipment prepared over the years at JET are appropriate for the successful and rapid replacement of components in an activated tokamak environment.