%0 Journal Article
%A Kegler, Philip
%A Neumeier, Stefan
%A Klinkenberg, Martina
%A Bukaemskiy, Andrey
%A Deissmann, Guido
%A Brandt, Felix
%A Bosbach, Dirk
%T Accelerated dissolution of doped UO2-based model systems as analogues for modern spent nuclear fuel under repository conditions
%J MRS advances
%V 8
%N 6
%@ 2059-8521
%C Cham
%I Springer Nature Switzerland AG
%M FZJ-2023-03429
%P 255 - 260
%D 2023
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000957013800001
%R 10.1557/s43580-023-00544-y
%U https://juser.fz-juelich.de/record/1014739