Justification of Explosion Safety Conditions in Evaporation of Nitric Acid Solutions Containing Various Reductants

Abstract Causes of the initiation of exothermic processes in nitric acid solutions containing reductants are analyzed. The required parameters of the occurring exothermic reactions are determined. The main conditions of the explosion safety of solution evaporation operations in commercial evaporators at radiochemical plants are formulated. The radiolysis of mixtures increases the onset temperature T st of the exothermic reaction, and uranyl nitrate does not affect T st . The explosion safety in evaporation of reductant solutions can be ensured even if their heating is accompanied by various exothermic reactions.