The radiation stability was investigated of organic phases containing tertiary benzyldialkylamines and quaternary benzyltrialkylammonium
salts which are sultable for the separation of lanthanides and americium from irradiated nuclear fuel. Attention was paid
to changes of the extraction properties in Eu(III) and Am(III) extraction. The influence of the individual components forming
the organic phase (extractant, solvent, solubilizer and nitric acid) on the decrease of the extraction capacity of the organic
phase after irradiation is discussed. The greatest changes in the distribution coefficients DEu and DAm after irradiation were shown for extraction in the presence of nitric acid. As regards the absorbed dose, these systems can
be considered as stable in comparison with organophosphorus extractans.