Simulated Experiment Study on Purification Performance of Ion Exchange Resin in Nuclear Power Plant

The typical fission products and corrosion products that are in ion form (such as Cs⁺, Sr²⁺ and Co²⁺) in liquid radwaste from nuclear power plant were chosen to confect simulated sample, and the dynamic ion exchange experiments were performed using resins of different models. The influence of different experiment conditions including depth of resin loaded and volumetric velocity on purification performance (decontamination factor) of resin was studied. The results show that decontamination capability is significantly affected by the depth of resin loaded, especially for resin of high cross-link, and the decontamination factors for Cs⁺, Sr²⁺ and Co²⁺ removal are increased by more than 200%. Increase in volumetric velocity affects the decontamination performance and the decontamination factor of high cross-link resin improve significantly after volumetric velocity increased. The cross-link doesn’t influence decontamination performance at flow rate of 10 BV/h. The decontamination performance of macro-pore resin is better than that of gel resin with sample concentration of 1 mg/L. The purification performance for cation contamination of mixed resin is better than that of cation resin under the same conditions.