Abstract
The aluminium-silicate ceramic matrix KAB 78, developed for the Immobilization of TRU wastes, has been doped with 20 wt% of Pu(238)O{sub 2,} in order to irradiate the matrix by the same {alpha}-dose over a period of three years, as accumulated within a storage time of about 100 000 years, when loaded with the real TRU waste. The Pu(238)-doped ceramic KAB 78 was investigated, by means of ceramographic methods, while the accumulated {alpha}-dose increased up to 8.33 E 9 Gy (9.4 E 18 {alpha}-decays/g). Special attention was directed to the development of the microstructure, the crystalline state and the lattice constants of the matrix phases, as well as to stored energy, as a function of the accumulated {alpha}-dose. The lattice constants of the matrix phases corundum and mullite were found to be only slightly enlarged. Any sign of metamictization beginning has not been detected. Changes in the micro-structure have not occurred and the amount of stored energy has been determined to be less than 11 J/g. In order to study the corrosion behaviour of the Pu(238)-doped ceramic and ceramics loaded with real dissolver residues, leach tests were performed over a period of 214 days, using either Q-brine or Dl-water of up
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Citation Formats
Loida, A, and Peisa, R.
Long-term behaviour of TRU-waste-bearing ceramics Task 3 Characterization of radioactive waste forms a series of final reports (1985-89) No 16.
France: N. p.,
1991.
Web.
Loida, A, & Peisa, R.
Long-term behaviour of TRU-waste-bearing ceramics Task 3 Characterization of radioactive waste forms a series of final reports (1985-89) No 16.
France.
Loida, A, and Peisa, R.
1991.
"Long-term behaviour of TRU-waste-bearing ceramics Task 3 Characterization of radioactive waste forms a series of final reports (1985-89) No 16."
France.
@misc{etde_10124318,
title = {Long-term behaviour of TRU-waste-bearing ceramics Task 3 Characterization of radioactive waste forms a series of final reports (1985-89) No 16}
author = {Loida, A, and Peisa, R}
abstractNote = {The aluminium-silicate ceramic matrix KAB 78, developed for the Immobilization of TRU wastes, has been doped with 20 wt% of Pu(238)O{sub 2,} in order to irradiate the matrix by the same {alpha}-dose over a period of three years, as accumulated within a storage time of about 100 000 years, when loaded with the real TRU waste. The Pu(238)-doped ceramic KAB 78 was investigated, by means of ceramographic methods, while the accumulated {alpha}-dose increased up to 8.33 E 9 Gy (9.4 E 18 {alpha}-decays/g). Special attention was directed to the development of the microstructure, the crystalline state and the lattice constants of the matrix phases, as well as to stored energy, as a function of the accumulated {alpha}-dose. The lattice constants of the matrix phases corundum and mullite were found to be only slightly enlarged. Any sign of metamictization beginning has not been detected. Changes in the micro-structure have not occurred and the amount of stored energy has been determined to be less than 11 J/g. In order to study the corrosion behaviour of the Pu(238)-doped ceramic and ceramics loaded with real dissolver residues, leach tests were performed over a period of 214 days, using either Q-brine or Dl-water of up to 200{sup 0}C. Leach rates, based on the total {alpha}-activity were found to be slightly higher, when leaching the Pu(238)-doped ceramics. Reaction zones of 150 up to 600 {mu}m thickness were formed, with a significant decrease of Si, whereas the concentrations of Al and Pu remained unaffected.}
place = {France}
year = {1991}
month = {Dec}
}
title = {Long-term behaviour of TRU-waste-bearing ceramics Task 3 Characterization of radioactive waste forms a series of final reports (1985-89) No 16}
author = {Loida, A, and Peisa, R}
abstractNote = {The aluminium-silicate ceramic matrix KAB 78, developed for the Immobilization of TRU wastes, has been doped with 20 wt% of Pu(238)O{sub 2,} in order to irradiate the matrix by the same {alpha}-dose over a period of three years, as accumulated within a storage time of about 100 000 years, when loaded with the real TRU waste. The Pu(238)-doped ceramic KAB 78 was investigated, by means of ceramographic methods, while the accumulated {alpha}-dose increased up to 8.33 E 9 Gy (9.4 E 18 {alpha}-decays/g). Special attention was directed to the development of the microstructure, the crystalline state and the lattice constants of the matrix phases, as well as to stored energy, as a function of the accumulated {alpha}-dose. The lattice constants of the matrix phases corundum and mullite were found to be only slightly enlarged. Any sign of metamictization beginning has not been detected. Changes in the micro-structure have not occurred and the amount of stored energy has been determined to be less than 11 J/g. In order to study the corrosion behaviour of the Pu(238)-doped ceramic and ceramics loaded with real dissolver residues, leach tests were performed over a period of 214 days, using either Q-brine or Dl-water of up to 200{sup 0}C. Leach rates, based on the total {alpha}-activity were found to be slightly higher, when leaching the Pu(238)-doped ceramics. Reaction zones of 150 up to 600 {mu}m thickness were formed, with a significant decrease of Si, whereas the concentrations of Al and Pu remained unaffected.}
place = {France}
year = {1991}
month = {Dec}
}