  The operation of a nuclear power station powering Deep Space transport is
presented in the paper. The power station consists of a Gas Core Reactor (GCR)
with magnetohydrodynamic (MHD) generator. A new model of gas core reactor which
has advantages by comparison with known models is suggested. It is shown that
$200\ ton$ system would generate $200\ MW$ electricity. The gas core reactor
consists of a spherical cavity of $1\ m$ to $1.5\ m$ radius surrounded by a
$50\ cm$ thick liquid beryllium reflector within molybdenum--92 container. The
fuel consists of $^{235}$UF$_4$, KF, and K. It is demonstrated that such power
station will work for gaseous fuel pressures of $50\ atm$ to $100\ atm$. The
Monte-Carlo simulations describing paths of thousands of neutrons are
performed. These simulations yield neutronic results, i.e. the fractions of
neutrons causing fission, being absorbed by moderator, and escaping the
reactor. From this information one can calculate minimum needed pressure inside
the reactor, the reactor size, and moderator thickness. The conductivity of
superheated fuel depending on temperature and pressure is also calculated. It
is concluded that space propulsion is the best use of uranium resources.
