Thermal stability and radiation resistance of trifluoromethyl phenyl sulfone in the presence of nitric acid

Resumo

The effect of HNO₃ on the thermal stability and radiation resistance of trifluoromethyl phenyl sulfone (FS-13) used as extractant diluent in high-level waste partitioning was studied. Heating of FS-13 in the presence of 14 M HNO₃ is not accompanied by exothermic effects up to 160°С. The amount of gaseous products released in the course of heating the system consisting of FS-13 and HNO₃ and the composition of the major radiolysis products of the system components at irradiation doses of up to 0.5 MGy were determined.