The radiation stability of UNEX stripping solutions containing water, methylamine carbonate, nitrilotriacetic acid, and metal salts was experimentally studied. The decomposition of the methylamine carbonate and nitrilotriacetic acid under gamma irradiation (dose: 0.29 kGy) is lower than 0.5 molecules per 100 eV or about 7.2E-04% and 0.047%, respectively. The decomposition products do not adversely affect the UNEX process up to a 3 MGy absorbed dose. The stripping solutions can be regenerated and reused.