Author:
Siemer D. D.,Roy Delia M.,Grutzeck Michael W.,Gougar M. L. D.,Scheetz Barry E.
Abstract
ABSTRACTThe logical place for the US Federal government to site a permanent
repository for its massive accumulation of cold-war reprocessing radwaste
would be at its primary cold-war nuclear device testing reservation, the
Nevada Test Site(1). Regardless of whether it eventually chooses
to implement that repository by drilling lateral “drifts” into consolidated
rock (e.g. its proposed Yucca Mountain facility) or by augering
moderately-deep boreholes into unwelded alluvium beds (e.g. the “Greater
Confinement Disposal (GCD) repository implemented at Frenchman Flats in 1984
(2), zeolitic hydroceramic materials would be more stable than
would glasses. The thermodynamic rationale for this is that in such regions,
soil solutions and soil gasses both tend to “weather” buried natural glasses
to zeolitic materials(3). It has also been demonstrated that the
same type of phases form when properly designed cementitious “grouts” are
cured under mild hydrothermal conditions(4,5) - precisely those
conditions assumed by DOE's repository modelers for “failed” (i.e. flooded)
repositories and under which radwaste-type glasses rapidly decompose to form
crystalline zeolitic phases(6,7).
Publisher
Springer Science and Business Media LLC
Cited by
2 articles.
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1. Nuclear waste forms;Geological Society, London, Special Publications;2004
2. Alkali-activated cements Opportunities and challenges;Cement and Concrete Research;1999-02