Thermal Responses in Underground Experiments in a Dome Salt Formation
Identification of suitable sites and construction of radioactive waste repositories is the goal of the National Waste Terminal Storage (NWTS) Program. To provide design information for a repository in dome salt, in-situ experiments with nonradioactive heat sources are planned.
Three such experiments using electrical heat sources are scheduled to be carried out in a salt dome. The purpose of these experiments is to acquire rock mechanics data to ascertain the structural deformation due to the thermal load imposed, to study brine migration and corrosion, and to provide thermal data. A data acquisition system is provided with these experiments to monitor temperatures, heat fluxes, stresses, and ground displacement.
A thermal analysis was made on models of each of these experiments. The objective of the analysis is to verify the capability of making accurate transient temperature predictions by the use of computer modeling techniques. Another purpose is to measure in-situ thermal conductivity and compare the results with measurements taken from core samples.
The HEATING5 computer program was used to predict transient temperatures around the experiments for periods up to 2 years using two-dimensional and three-dimensional heat transfer models. The results of analysis are presented with the associated boundary conditions used in the individual models.
KeywordsRadioactive Waste Heat Transfer Model Dome Salt Backfill Material Underground Experiment
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