Abstract:
:Yucca Mountain is being considered as a geological repository for the USA's spent nuclear fuel and high-level nuclear waste. Numerous groundwater seeps appeared during March 2005 within the exploratory studies facility (ESF), a tunnel excavated in the mountain. Because of the relevance to radionuclide transport and unsaturated zone-modeling studies, we analyzed the seep samples for major anions and cations, rare earth elements, and colloids. Major ion species and elemental concentrations in seep samples reflect interaction of the water with the volcanic rock and secondary calcites. Elemental fractograms from flow-injection field-flow fractionation ICP-MS scans detected Br, Ca, Cl, Cu, Fe, I, Mg, Si, Sr, W, and U at void fractions, suggesting they may be present in the form of dissolved anions. Colloids approximately 10 nm in hydrodynamic diameter, possibly calcite, were also present in the seepage samples. Geochemical calculations indicate, however, these may be an artifact (not present in the groundwater) which arose because of loss of CO2 during sample collection and storage.
journal_name
Environ Geochem Healthjournal_title
Environmental geochemistry and healthauthors
Cizdziel JV,Guo C,Steinberg SM,Yu Z,Johannesson KHdoi
10.1007/s10653-007-9105-1subject
Has Abstractpub_date
2008-02-01 00:00:00pages
31-44issue
1eissn
0269-4042issn
1573-2983journal_volume
30pub_type
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