Critical parameters for a high-level waste repository. Volume 1. Basalt

This report covers the identification and prioritization of critical parameters for a repository in bedded salt. A parameter is a physical property whose value helps determine the characteristics or behavior of a repository system. A parameter is considered to be critical if a mistake in its measurement, or the inability to measure it, could lead to a wrong conclusion about the adequacy of a repository. Consideration was given to the relative importance of critical parameters in four specific discipline areas: geomechanics, geology, hydrology, and geochemistry. Relative importance of the parameters was independently considered for each of the four major phases of repository activity: site characterization, site construction, site operation, and site closure and decommissioning. Important activities are determination of hydrologic characteristics and salt dissolution rates, and their long-term monitoring. 169 refs., 1 fig., 8 tabs.