Present state and future subjects on tritium measuring techniques

A tritium measuring technique is one of key technologies for the precise control and safe handling of fuel particles in the fusion systems.A variety of techniques have been already established so far for measurements of low-level tritium such as a tracer of chemical reactions and environmental tritium.However, high-level and hugeamount of tritium is applied to the fusion reactors Some techniques developed so far are applicable for fusion environment, but new techniques will be also required for establishment of a tritium plant in future fusion reactors.From this viewpoint, application of P-ray-induced X-ray spectrometer (BIXS) for highly tritiated waters is describeqwith the conventional devices, where the BIXS was newly developed by author to measure high-level tritium in-situ Present state and future subjects oftritium measurlng teChniqueswiIl be discussed in this paper