This paper describes the system being designed to study the processes of hy
drogen isotopes (or their mixtures) interaction with a solid body at pressu
res up to 500 MPa. Hydrogen isotopes pressure is produced by a thermodesorp
tion source based on vanadium dihydride. Gas is sampled through an intermed
iate volume. Cias chromatograph is used to analyze the gas for isotopic com
position. Possibility of the system development is exemplified by temperatu
re dependencies of equilibrium desorption pressures for vanadium dihydride
in a pressure range up to 500 MPa obtained using available equipment. (C) 2
001 International Association for Hydrogen Energy. Published by Elsevier Sc
ience Ltd. All rights reserved.