Experimental data on the size changes and dynamic modulus of elasticit
y of Russian-produced graphites neutron-irradiated at temperatures in
the range 400-500 degrees C with fluences of up to 3.6 x 10(22) n/cm(2
) (E > 0.18 MeV) are presented. The results are compared with those fo
r foreign reactor graphites. The radiation effects are correlated with
the structure and properties of the materials studied.