Mechanical impact of high-level-waste glass canisters : Waste glass fracture, aerosol release, and activity source terms
Waste glass fracture by mechanical impact and aerosol release mechanisms have been studied in order to evaluate source term data for disposal accidents with bare high level waste canisters. Conditions are those predicted in a German salt dome repository, assuming a 10 m drop in the reloading hall and a 600 m drop in a borehole. Laboratory-scale drop tests, full-scale drop tests and fractometry tests were performed, and the particle-size distribution and elemental composition of the particles were determined. Results of the laboratory-scale and full-scale tests are in full agreement and compare favourably with existing glass-fracture data. The dominant parameter was the impact energy. Other test or glass parameters were negligible. Breaking the canister had no effect on aerosol release. Respirable aerosol source terms (airborne particle fraction with diameters less than 10 microns) were determined for the reloading hall drop (about 0.0002%), and for the borehole drop (about 0.3%). Discrete metallic particles in the glass matrix were released with a higher probability, which might add to the activity source terms of waste-glass compositions with metallic feed sludge particles.
Bibliographic Reference: Paper presented: 1991 Joint International Waste Management Conference, Seoul (KR), Oct. 21-26, 1991
Availability: Available from (1) as Paper EN 36436 ORA
Record Number: 199111522 / Last updated on: 1994-12-02
Original language: en
Available languages: en