Abstract: In order to improve the resin cement solidified waste for boron tolerance rate, by changing the curing formulations, field solidification studies were carried out at the radioactive waste disposal systems of Daya Bay Nuclear Power Plant (GNPS) and Ling Ao Nuclear Power Plant (LNPS). Results show that the spent resin inclusive rate increased from 32.4% to 46.3%, improved 42.9%, solidified volume decreased by 30%. Performance of the solidified waste satisfies the requirements of GB 14569.1—2011. Six years of engineering practices have proved that the improved cement solidification process can be used in nuclear power plants curing system without changing the original facility situation.

Key words: PWR nuclear power plant, boric acid solution, radioactive spent ion exchange resin, a new technology of cement solidification