Geologic, geochemical rock mechanics and hydrologic characteristics of candidate repository horizons
Abstract
The feasibility of constructing a nuclear waste repository in basalt (NWRB) on the Hanford Site is determined. Studies conducted indicate feasibility and performance requirements are within a significant safety margin. The two most promising candidate repository horizons for an NWRB are the middle Sentinel Bluffs and the Umtanum flows. Both of these flows are laterally continuous and have thicknesses of competent rock adequate to accommodate a repository. Significant geologic differences between the two flows are their depth, total thickness, and variability of flow top thickness. These differences are considered in selection of one of the two flows for breakout from an exploratory shaft. The geochemical characteristics of both the middle Sentinel Bluffs flow and the Umtanum flow favor long term isolation of radionuclides by providing an environment in which canister corrosion rates and solubility of many radionuclide bearing solids is relatively low.
- Publication:
-
Presented at NWTS Inform. Meeting on Basalt Isolation Project
- Pub Date:
- September 1982
- Bibcode:
- 1982nwts.meet.....L
- Keywords:
-
- Geochemistry;
- Hydrology;
- Radioactive Wastes;
- Rock Mechanics;
- Underground Storage;
- Waste Disposal;
- Environment Effects;
- Long Term Effects;
- Permeability;
- Pollution Control;
- Safety Factors;
- Solubility;
- Nuclear and High-Energy Physics