Mineralogical Charecteristics of Yucca Mountain Alluvium and Effects on Neptunium (V) Sorption

Ding, M. ; Chipera, S.J. ; Reimus, P.W.

United States. Department of Energy. Yucca Mountain Project Office.

关键词: Neptunium;    Radioactive Wastes;    Adsorption;    Radioisotopes;    Yucca Mountain;   

DOI  :  10.2172/894821
RP-ID  :  NA
RP-ID  :  NA
RP-ID  :  894821

美国|英语

来源: UNT Digital Library

【 摘 要 】

Saturated alluvium is expected to serve as an important natural barrier to radionuclide transport at Yucca Mountain, the proposed geological repository for disposal of high-level nuclear wastes. {sup 237}Np(V) (half-life = 2.4 x 10{sup 5} years) has been identified as one of the radionuclides that could potentially contribute the greatest dose to humans because of its relatively high solubility and weak adsorption to volcanic tuffs under oxidizing conditions. The previous studies suggested that the mineralogical characteristics of the alluvium play an important role in the interaction between Np(V) and the alluvium. The purpose of this study is to further evaluate the mineralogical basis for Neptunium (V) sorption by saturated alluvium located down-gradient of Yucca Mountain.