Hydrothermal glass reactions in salt brine

A simulated high-level waste glass was exposed to high-temperature salt brine and deionized water. The glass undergoes partial crystallization, depending on the conditions, and yields NaFeSi2O6 as the primary alteration product. At the extreme temperature of these tests, cesium, rubidium, strontium and molybdenum show moderate-to-high solubilities in salt brine. Solubility in deionized water is an order of magnitude lower than in salt brine, but the glass alteration rate is higher. In a similar salt brine test, a supercalcine showed similar cesium and strontium releases when compared to the glass