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Title: The chemical behavior of the transuranic elements and the barrier function in natural aquifer systems

In a geological repository for long-lived radioactive wastes, such as actinides and certain fission products, most of the stored radionuclides remain immobile in the particular geological formation. If any of these could possibly become mobile, only trace concentrations of a few radionuclides would result. Nevertheless, with an inventory in the repository of many tonnes of transuranic elements, the amounts that could disperse cannot be neglected. A critical assessment of the chemical behavior of these nuclides, especially their migration properties in the aquifer system around the repository site, is mandatory for analysis of the long-term safety. The chemistry requited for this includes many geochemical multicomponent reactions that are so far only partially understood and [which] therefore can be quantified only incompletely. A few of these reactions have been discussed in this paper based on present knowledge. If a comprehensive discussion of the subject is impossible because of this [lack of information], then an attempt to emphasize the importance of the predominant geochemical reactions of the transuranic elements in various aquifer systems should be made.
Authors:
Publication Date:
OSTI Identifier:
313363
Report Number(s):
HNF-MR--0536
ON: DE99050249; BR: EW3130010; TRN: 99:003036
DOE Contract Number:
AC06-96RL13200
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 17 Sep 1997
Research Org:
Westinghouse Hanford Co., Richland, WA (United States)
Sponsoring Org:
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ACTINIDES; RADIOACTIVE WASTES; AQUIFERS; MOBILITY; CHEMICAL PROPERTIES