Thermal Salt Sealing System

Long-term disposal of nuclear waste continues to be an issue of national and international importance. A 2012 Blue Ribbon Commission report to the Secretary of Energy states, .“..this nation’s failure to come to grips with the nuclear waste issue has already proved damaging and costly and it will be more damaging and more costly the longer it continues….” The proposed thermal salt sealing project provides a unique opportunity to develop a technology that can be used to isolate nuclear waste within a deep, impermeable underground salt formation. The knowledge acquired from this project has the potential to significantly contribute to the U.S. Department of Energy Used Fuel Disposition Campaign. Phase I produced promising results for the thermal salt seal concept. The project incorporated numerical modeling that indicated feasibility, achieved successful preliminary field tests in an underground mine, and recovered samples of the seal that were shown through permeability testing and microscopy to have features suitable for a permanent seal The overall goal of the Phase II effort is to continue to advance the thermal salt sealing application for nuclear waste disposal and conventional well plugging and abandonment, while building interest in the system from potential end-users and influencers. To achieve this goal, the Work Plan will focus on the following objectives: (1) enhanced analysis of Phase I field tests, (2) initial commercialization and market research, (3) commercial tool development, (4) numerical modeling, (5) prototype tool build, benchmark testing, and field-scale testing, (6) post-test analysis, and (7) commercialization and investment research. As an outcome of these tasks, we expect to provide the U.S. Department of Energy and private industry with a thermal salt sealing technology that can create an impermeable and impervious barrier of native salt. The primary commercialization opportunity for our technology will likely occur through well plugging and abandonment in the salt cavern industry. Several thousand underground salt caverns have been solution-mined throughout the world. As these caverns age, they eventually reach the end of their economic life and must be plugged and abandoned to ensure human safety and avoid environmental risk. However, a suitable long-term solution does not currently exist for plugging and abandoning salt cavern wells. By developing and deploying our proposed thermal salt sealing technology, we will provide a suitable plugging-and-abandonment solution for salt cavern wells and capitalize this opportunity, while also protecting the environment and human safety.