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The most common basic process of air detritiation employing oxidation of tritiated gases in a catalytic recombiner and subsequent collection of HTO on molecular sieve driers can also be used for a large scale detritiation system for the Next Step DT fusion device. Performance, economy and reliability can be improved by modifying the design of basic elements (recombiners and molecular sieve driers), and by re-arranging them in a system permitting multiple process path choices for optimum performance depending on demand. The proposed system is shown to be: (i) free of secondary tritium releases by permeation; (ii) economical, with less than 1 kW power required in a ready-to-operate hot standby condition; (iii) capable of reducing inlet humidity of the order of 10,000 ppm (volume) to 0.01 ppm at the outlet by using two adsorber stages in series; (iv) capable of providing the best starting condition for water processing, with little or no dilution by H(2)O from isotopic swamping due to the use of two adsorber stages. The system detritiation factor DF is defined and discussed, demonstrating the overriding importance of high water retention efficiency.

Additional information

Authors: HEMMERICH J L, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(92)50 EN (1992) 23 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199211274 / Last updated on: 1994-11-29
Original language: en
Available languages: en
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