Investigation of full-scale high-level waste containment glass blocks
A two year study of the degree of fracturation in full-scale high level waste glass blocks was undertaken. The project included a theoretical investigation of thermal and mechanical stresses arising in the glass and determination of the fracture-inducing stress distribution in the block. An experimental study was also carried out based on tomographic examinations performed at the BAM in Berlin on full-scale canisters containing glass cast at Marcoule, and on water leach tests at 100 C to evaluate the fractured leachable surface area. The CASTEM code system was used to determine the temperature profiles versus time for the glass package. The mechanical study revealed that controlled cooling of glass blocks must be extremely slow (less than 5 C per hour) to have a significant effect on the stress loading. Three series of tomographical experiments were carried out: two on a canister as cast, and a third after relieving the canister stresses. Static and dynamic leach tests conducted to determine the fracturation factor of the glass blocks showed that only static leaching can provide satisfactory results. Fracturation factors of 10 to 15 were measured on industrial glass blocks.
Bibliographic Reference: EUR 13612 EN (1991) 108 pp., FS, ECU 10
ISBN: ISBN 92-826-2818-3
Record Number: 199111031 / Last updated on: 1994-12-02
Original language: en
Available languages: en