Glass Composition for Vitrifying Mixed Radioactive Waste
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Solution Overview
Problem
Current technologies are inadequate for vitrifying mixed waste products, including flammable waste and low-level radioactive waste, as they do not effectively prevent radioactive material leakage and require numerous waste drums, making long-term disposal challenging.
Innovation Solution
A glass composition comprising SiO2, Al2O3, B2O3, CaO, K2O, Li2O, MgO, Na2O, TiO2, and VO2, with optional additives like As2O5, CeO2, CoO, Fe2O3, MnO2, P2O5, and ZrO2, is used to create a stable solidified body that delays or prevents radioactive material leakage, suitable for vitrifying mixed waste products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cement or waste drum containment is used for mixed waste products, then the waste can be temporarily stored, but the radioactive materials may leak into underground water and the number of waste drums becomes excessive
Solution Approach 1:
The invention changes the chemical composition parameters of the waste form by using a specific glass composition with controlled ratios of SiO2 (40-50 wt%), Al2O3 (11-16 wt%), B2O3 (8-15 wt%), and other oxides. This parameter optimization creates a glass matrix that effectively immobilizes radioactive materials, preventing leakage into underground water while reducing the total volume of waste containment needed.
Solution Approach 2:
The invention creates a composite material system by combining multiple glass-forming oxides (SiO2, Al2O3, B2O3, CaO, K2O, Li2O, MgO, Na2O) with optional additives (As2O5, CeO2, CoO, Fe2O3, MnO2, P2O5, ZrO2). This composite glass composition provides enhanced chemical durability and radiation resistance, forming a stable solidified body that prevents radioactive material leakage more effectively than traditional cement or waste drum containment.
2Adaptability or versatility
If existing glass composition is used for vitrification, then some radioactive waste can be treated, but it is not suitable for mixed waste products containing flammable materials and low-level radioactive waste
Solution Approach 1:
The invention develops a universal glass composition that can accommodate diverse waste types including flammable materials (gloves, working clothes, plastic waste, rubber) and low-level radioactive waste products. The glass matrix is designed to be compatible with a broad range of waste compositions, providing both adaptability to different waste types and reliable prevention of radioactive material leakage through its optimized chemical structure and high chemical durability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The glass composition significantly reduces the volume of radioactive waste, maximally delays or prevents radioactive material leakage from the solidified body, and is suitable for long-term disposal, reducing the need for multiple waste drums.
Implementation Method 1
a glass composition that is suitable for mixed waste products, which include flammable waste products, such as gloves, working clothes, plastic waste, and rubber, and low-level radioactive waste products
Data Source
AI summary
This invention relates to the vitrification of radioactive waste products. According to this invention, a glass composition that is suitable for mixed waste products, which include flammable waste products, such as gloves, working clothes, plastic waste, and rubber, and low-level radioactive waste products, and a method of vitrifying the mixed waste products using the same are provided to significantly reduce the volume of radioactive waste products and to vitrify the mixed waste products using the glass composition, which is suitable for vitrifying the mixed waste products, thereby maximally delaying or completely preventing the leakage of radioactive materials from a glass solidified body.