In-Situ Experiments in Fractured Granite

Abstract

Two heater tests, a migration test and several corrosion tests were performed in fractured granite near surface. Predicted rock temperatures agreed well with those observed at no fracture zone. On the other hand, measured rock temperatures were lower than predicted temperatures at fracture zone because of the heat convection due to groundwater flow in a fracture zone. Migration tests were carried out in a single fracture zone of experimental room, and the results were analyzed by a single fracture model. Stress corrosion cracking test for ten kinds of metal for candidate canister materials was carried out under in-situ condition.