Thermophysical Properties of Materials
Thermophysical properties of uranium hexafluoride. Properties in the rarefied-gas region
V. V. Malyshev I. V. Kurchatov Institute of Atomic Energy
Abstract:
Updated results of experimental studies of the thermophysical properties of uranium hexafluoride
$(\rm UF_6)$ in the rarefied-gas region in the temperature range from
$287$ to
$368$ K, the range of pressures from
$53$ to
$750$ Torr, and the range of gas densities from
$0.00188$ to
$0.0118$ g/cm
$^3$ were obtained by processing the author’s previous data using the Origin-
$8$ graphic-mathematical program. Updated
$\rm UF_6$ state parameter values in the region of vapor-solid equilibrium and updated data for the heat of sublimation were obtained. On the basis of
$P$–
$V$–
$T$ data, an equation of state for
$\rm UF_6$ was constructed that provides twice the approximation to the experimental pressure data with a standard deviation of
$0.53$ Torr as compared to the previous equation and
$0.12\%$ over the entire range of state parameters studied. Data were updated for the second virial coefficient. We used uranium hexafluoride with a natural content of uranium isotopes and a purity of
$99.98$ vol
$\%$. A description of the experimental equipment and methods of research and processing of experimental data are given.
UDC:
536.71
Received: 30.03.2021
Revised: 22.11.2021
Accepted: 28.11.2021
DOI:
10.31857/S0040364422020272
Fulltext:
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