Hydrothermal immobilization of glass powder containing simulated high level radioactive waste.

Probabilistic risk analysis for a high-level radioactive waste repository.

A probabilistic risk analysis (PRA) for a high-level radioactive waste repository is very important since it gives an estimate of its health impacts, allowing comparisons to be made with the health impacts of competing technologies. However, it is extremely difficult to develop a credible PRA for a specific repository site because of large uncertainties in future climate, hydrology, geological ...

Immobilization of Radioactive Waste in Fly Ash Based Geopolymers

The low-level salt waste (LAW) associated with the production of nuclear materials at US Department of Energy (DOE) facilities will be disposed of in shallow land burial sites managed by the DOE. Two of the primary contaminants of interest are Tc-99 and I-129, both soluble and long-lived radionuclides. Cs-137, a short-lived, strong gamma emitter is also a soluble contaminant of concern. In addi...

Disposal of low-level radioactive waste.

The Act encouraged states to form regional compacts for the disposal of low-level radioactive waste (LLRW). The Act contained both positive and negative incentives. The positive incentive was a provision that allowed compacts to restrict access to their regional LLRW disposal facility to member states beginning in 1993, thus limiting the amount of waste disposed of in any state hosting a region...

Foaming in Radioactive Waste Treatment and Immobilization Processes

“Foaming and Antifoaming in Radioactive Waste Pretreatment and Immobilization”

The objective of this research is to develop a fundamental understanding of the physico-chemical mechanisms that cause foaminess in the DOE High Level (HLW) and Low Activity radioactive waste separation processes and to develop and test advanced antifoam/defoaming agents. Antifoams developed for this research will be tested using simulated defense HLW radioactive wastes obtained from the Hanfor...