Hydrothermal reactions of strontium and transuranic simulator elements with clay minerals, zeolites, and shales.

S. Komarneni, W. B. White

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Reactions of Sr, La, and Nd (the latter two elements simulating Am and Cm) with potential backfill minerals for radioactive waste storage and with repository wall rocks, such as shale, were investigated under simulated repository conditions of 200 and 300oC for 12 weeks under a confining pressure of 30 MPa. The solid and solution reaction products were characterized to determine the nature and extent of reaction. The formation of sparingly soluble Sr phases by the reaction of the soluble Sr compounds with such backfill materials indicates that the backfill may serve as a barrier during the thermal period of the waste in the life of a repository. These same minerals and shales removed as much as 99.99% of the added La or Nd from solution at 300oC. Zeolites reacted with La and Nd to form smectite. Thus, if La and Nd truly simulate the reactivity of Am and Cm, properly designed backfills can serve as a barrier to the migration of transuranic elements of nuclear wastes.-from Authors

Original languageEnglish (US)
Pages (from-to)113-121
Number of pages9
JournalClays & Clay Minerals
Volume31
Issue number2
DOIs
StatePublished - Jan 1 1983

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)

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