Study on retardation mechanism of 3H, 99Tc, 137Cs, 237Np and 241Am in compacted sodium bentonite

H. Sato, T. Ashida, Y. Kohara, M. Yui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

24 Citations (Scopus)


Experiments were carried out in the density range of 0.4-2.0(x 103 kg/m3). Bentonite in the cell was prepared to be saturated with distilled water. The measured apparent diffusion coefficient decreases with increasing dry density of bentonite. That the apparent diffusion coefficient of 3H decreased as a function of dry density of bentonite appears to be the effect of the change of porous structure with dry density of bentonite. 99Tc may be retarded by anion-exclusion because dominant diffusion species of 99Tc is pertechnetate ion under atmospheric condition. Retardation for 137Cs may be caused by ion-exchange on bentonite.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
PublisherPubl by Materials Research Society
Number of pages6
ISBN (Print)1558991891
Publication statusPublished - Jan 1 1993
Externally publishedYes
EventProceedings of the 16th International Symposium on the Scientific Basis for Nuclear Waste Management - Boston, MA, USA
Duration: Nov 30 1992Dec 4 1992

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


OtherProceedings of the 16th International Symposium on the Scientific Basis for Nuclear Waste Management
CityBoston, MA, USA

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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