Abstract: A study on formula improvement for cement solidification of boron-containing concentrates and cement replacement was carried out. Based on the requirements of GB 14569.1—2011 “Performance requirements for low and intermediate level radioactive waste form-Cement solidification form”, cold tests were conducted with scales from laboratory, 200 L to 400 L, respectively, and the on-site solidifying process in nuclear power plants is simulated. Experimental results showed that the impact resistance, compressive strength, free liquid, freeze-thaw resistance, γ-irradiation resistance and immersion resistance of cement solidified samples meet the requirements of national standards, and the waste containment rate is increased from 46.99% to 57.63%. The cost per ton of solidifying waste materials is reduced by 69.29%. The recommended formula can be used to solidify real radioactive wastes.

Key words: boron containing concentrate, cement solidification waste, containment capacity