Study on Release Behavior of ⁹⁰Sr, ¹³⁷Cs and ⁶⁰Co in NPP Solidified Waste Form

The release behavior of radioactive nuclides ⁹⁰Sr, ¹³⁷Cs and ⁶⁰Co in NPP resin and concentrate cement-solidified waste form was studied. The release surrounding is that the waste is totally immersed by deionized water. The effective diffusivity was taken as release behavior. The results show that cumulative leaching fraction of nuclides in test solidified waste is under 4%, the release of ¹³⁷Cs is the fastest, ⁹⁰Sr is the second and ⁶⁰Co is the slowest. Nuclides releasing in the same waste sample becomes going down with compressive strength enlarging.