Beryllium silicate glass containing ThO2 and method for processing radioactive waste liquid

Abstract

The invention discloses beryllium silicate glass which comprises the components in percentage by mass as follows: a), 42%-49% of SiO2; b), 15%-20% of BeO; c), 11%-14% of Na2O; d), 5%-10% of Al2O3; e), 3%-6.5% of at least one transitional element oxide; f), 3%-6.5% of at least one rare earth oxide; g), 3%-6.5% of Am2O3; and h), 5%-8% of HfO2. The glass has very high stability for radiation, very good mechanical strength and very high chemical resistance, and can be used for sealing, storing and isolating the waste liquid under the condition that the size is reduced.

Description

technical field [0001] The invention relates to a beryllium silicate glass used for sealing, preserving and isolating radioactive waste liquid in nuclear reactor devices. Background technique [0002] Moderately radioactive radioactive waste water is produced in nuclear fuel regeneration equipment such as nuclear reactors, and is currently mainly treated by asphalting or cement solidification. However, the use of asphalt treatment has several major disadvantages: reduced stability, easy fire, limited range of use, and low mechanical strength. The cost of cement treatment is moderate, the application is simple, the mechanical strength is good, and the stability is long-lasting. But cement curing has two significant disadvantages: the volume of the waste material doubles after coating; and it affects the life expectancy of the obtained material. [0003] In addition, people are now also studying the use of glass to seal radioactive waste liquid. Because of its amorphous stat...

AI Technical Summary

Problems solved by technology

However, bituminous treatment has several major disadvantages: reduced stability, easy fire, limited range of use, low mechanical strength

However, cement curing has two significant disadvantages: the volume of the waste material doubles after coating; it affects the life expectancy of the obtained material

However, the stability, mechanical strength and corrosion resistance of borosilicate glass still cannot meet the needs of people to seal moderately radioactive waste liquid.