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Gas recovery during the first JET tritium experiment was based mainly on the use of a cryopump designed for the collection of torus exhaust gas. This cryopump system was extended to include the collection of gas from the neutral injectors and to provide sampling and diagnostic facilities such as an ionisation chamber for on-line tritium accounting, a mass spectrometer for gas analysis and a sampling manifold for off-site tritium accounting. The cryopump was backed by a collection system comprising a reservoir, recirculation pump and four uranium beds originally designed for the JET Active Gas Handling System. During operation of the system a total of 1450 bar.l of gas with a total tritium content of 4.3 x 1.0 E13 Bq (1162 Curies) was collected. A small exhaust detritiation system was installed to reduce emissions in case of accidents such as major torus or neutral injector air or water leaks. As no major problems were encountered during the experiment, it was not used.

Additional information

Authors: HEMMERICH J L, JET Joint Undertaking, Abingdon, Oxon. (GB);LÄSSER R, JET Joint Undertaking, Abingdon, Oxon. (GB);WINKEL T, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(92)05 EN (1992)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199211059 / Last updated on: 1994-12-02
Original language: en
Available languages: en