Chemical Denitration of Radioactive-Waste Solutions with Formic Acid

摘要

The denitration process with formic acid as reducing agent has been investigated under various aspects in the course of several years. All work - especially such as on the safety of the process - will soon be concluded. This includes dying out and recovery behavior of the reaction on feed interruption, a fault-tree analysis, determination of the explosion behavior of formic acid vapor-air mixtures, as well as tests on further reduction of nitrogen oxide content of the reaction gas by washing the gas with hot formic acid. Altogether, denitration is an effective preliminary step for removal of nitric acid from radioactive waste solutions. (ERA citation 07:045906)