Influence of a Film-Forming Amine on Repeated Adsorption and Regeneration of Ion Exchange Resins

Abstract

In the nuclear power industry, the use of film-forming amines (FFAs) for layup after secondary loop shutdown has become a new type of secondary loop corrosion inhibition technology. Different from most nuclear power units, the secondary loops of Chinese ones are all designed with condensate polishing systems. The ion exchange resin in the system must be regenerate and reuse. This study investigates the Influence of a FFA product already used in the nuclear power industry on the repeated adsorption and regeneration of ion exchange resins in the secondary loop of a nuclear power plant. After 9 times adsorptions adding 2 ppm FFA-A and regenerations according to the regeneration method of the nuclear power plant, the VEC of the cation resin decreased slightly. Because the alkali could not regenerate the adsorbed FFA-A, the VEC of the anion resin showed an “increasing” trend. The anion and cation resins have slightly floating and clumping phenomenon in the test. And after test, the “viscosity” of the anion and cation resins were slightly increase.