  At the initial stage, the development of wave reactors, which will operate in
the mode of wave nuclear burning (WNC), requires the study of the kinetics of
the WNC fuel mode when changing both external parameters (flux density of an
external neutron source, thermal parameters of heat transfer) and internal
parameters (fuel composition, reactor material parameter, delayed neutrons). In
order to confirm the possibility of WNC with enrichment, we study its impact on
the criterion of WNC for thorium fuel Th232 at different enrichments in Pu239)
and its behavior during the "ignition" stage. To confirm the fulfillment of the
criterion of slow WNC depending on the neutron energy, we perform a numerical
simulation of the thorium fuel WNC mode dynamics, taking into account the
delayed neutrons in the thermal and epithermal regions of the neutron energies
(0.015-10 eV).
