  Effect of atomic disordering induced by irradiation with fast neutrons on the
properties of the normal and superconducting states of polycrystalline samples
FeSe has been studied. The irradiation with fast neutrons of fluencies up to
1.25\cdot10^20 cm^-2 at the irradiation temperature Tirr ~ 50 \degree C results
in relatively small changes in the temperature of the superconducting
transition T_c and electrical resistivity Rho_25. Such a behavior is considered
to be traceable to rather low, with respect to that possible at a given
irradiation temperature, concentration of radiation defects, which is caused by
a simpler crystal structure, considered to other layered compounds.
