Isotopic water handling and hydrogen isotope recovery for fusion application using the Zr(V

N. Venkataramani, F. Ghezzi, G. Bonizzoni, W.T. Shmayda

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Abstract

A follow-up is done to earlier work on the conversion of isotopic waters to hydrogen isotopes, and it involves the reaction behavior of water vapor with Zr(V0.5Fe0.5)2getter alloy under water vapor flow conditions. The efficiency of the alloy, for the conversion of H2O and D2O to H2and D2, respectively, has been measured at different reactor pressures in the range of 10 to 330 Pa for different alloy temperatures in the range of 150 to 400°C and with hydrogen and oxygen concentrations in the alloy ≤250 mmol/mol of alloy. The conversion efficiency was measured to be in the range of 25 to 35% at reactor pressures of =250 Pa for water vapor flow rates of = 0.3 μmol/g of alloy per second, while it was found to be in the range of 70 to 80% at reactor pressures ≤20 Pa with flow rates of ≤0.02 μmol/g of alloy per second. These experiments demonstrate the feasibility of tritiated water vapor conversion to tritium using metallic getter alloys under quasi-steady-state conditions; this feasibility is very relevant to the fusion reactor fuel cycle.
Original languageEnglish
Pages (from-to)91 - 104
Number of pages14
JournalFusion Technology
Volume29
Issue number1
DOIs
Publication statusPublished - 1996
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

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