Review on Selection and Experiment Method of Commonly Studied Simulated Radionuclides in Researches of Nuclear Waste Solidification

Table 5

The application conditions and advantages of the simulated ⁹⁰Sr.

Simulants	Solidified body	Experimental method and temperature	Advantages
SrCl2·6H2O, Sr(NO3)2	Cementitious materials	Directly mixed in the solidified body for immobilization (<100°C)	Soluble in water; the aqueous solution is neutral and does not affect hydration
Sr(OH)2	Geopolymer gel	Directly mixed in the solidified body for immobilization (<100°C)	Easily soluble in water, completely ionized, no other elements were introduced except for Sr
SrCO3, SrSO4, or SrF2	Glass or ceramic	Melting method (1000–1350°C)	High melting points (>1400°C), participates in solid-phase reaction at high temperature to provide SrO for the product (SrF2 converts to SrO at >1000°C in air)
Sr(NO3)2	Phosphate or geopolymer	Melting method (750–1200°C)	Decomposes at high temperature (melting point is 570°C), releasing SrO for the solid-phase reaction