RT info:eu-repo/semantics/article
T1 First principles study of liquid uranium at temperatures up to 2050 K
A1 González del Río, Beatriz
A1 González Tesedo, Luis Enrique
A1 González Fernández, David José
K1 Liquid uranium
K1 22 Física
AB Uranium compounds are used as fissile materials in nuclear reactors. In present day reactors the most used nuclear fuel is uranium dioxide, but in generation-IV reactors other compounds are also being considered, such as uranium carbide and uranium mononitride. Upon possible accidents where the coolant would not circulate or be lost the core of the reactor would reach very high temperatures, and therefore it is essential to understand the behaviour of the nuclear fuel under such conditions for proper risk assessment. We consider here molten metallic uranium at several temperatures ranging from 1455 to 2050 K. Even though metallic uranium is not a candidate for nuclear fuel it could nevertheless be produced due to the thermochemical instability of uranium nitride at high temperatures. We use first principles techniques to analyse the behaviour of this system and obtain basic structural and dynamic properties, as well as some thermodynamic and transport properties, including atomic diffusion and viscosity.
PB IOP Publishing
SN 0953-8984
YR 2020
FD 2020
LK http://uvadoc.uva.es/handle/10324/42613
UL http://uvadoc.uva.es/handle/10324/42613
LA eng
NO Journal of Physics: Condensed Matter, 2020, Volume 32, Number 30
NO Producción Científica
DS UVaDOC
RD 24-abr-2024