TY  - JOUR
AU  - Kegler, Philip
AU  - Neumeier, Stefan
AU  - Klinkenberg, Martina
AU  - Bukaemskiy, Andrey
AU  - Deissmann, Guido
AU  - Brandt, Felix
AU  - Bosbach, Dirk
TI  - Accelerated dissolution of doped UO2-based model systems as analogues for modern spent nuclear fuel under repository conditions
JO  - MRS advances
VL  - 8
IS  - 6
SN  - 2059-8521
CY  - Cham
PB  - Springer Nature Switzerland AG
M1  - FZJ-2023-03429
SP  - 255 - 260
PY  - 2023
AB  - Systematic single-effect dissolution studies were carried out on the dissolution behaviour of pure and Cr- or Nd-doped UO2 reference pellets as model materials for spent nuclear fuel with varying doping levels, densities, and grain sizes as well as of industrially produced Cr- and Cr/Nd-doped UO2 pellets. The results were obtained from accelerated static batch dissolution experiments performed under strictly controlled conditions using H2O2 as simulant for radiolytic oxidants formed due to the alpha-irradiation of water. The results indicate that the addition of Cr and the consequential modification of the fuel matrix does not lead to a significant change of the dissolution behaviour of these model materials compared to pure UO2 reference materials. Contrarily, the dissolution rates of Nd-doped pellets are significantly lower than those of pure and Cr-doped pellets. These results provide additional insights into the influence of doping on the dissolution behaviour of modern spent light water reactor fuels under the post-closure conditions expected in a deep geological repository.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000957013800001
DO  - DOI:10.1557/s43580-023-00544-y
UR  - https://juser.fz-juelich.de/record/1014739
ER  -