Shielding parameters of reactor fast neutrons for ordinary,
hematite–serpentine and ilmenite–limonite concretes can be
compared with that for serpentine concrete and tabulated in
Tables 2 and 3. Removal RR(En) cross sections, relaxation length
(k), half value thicknesses (HVTs) and tenth value thicknesses
(TVTs) of reactor fast neutrons for these concretes have been
achieved from the attenuation relations of the shielding parameters
and were explained as: