Radionuclide Immobilization in the Phases Formed by corrosion of spent Nuclear Fuel: The long-Term Assessment

Ewing, Rodney C.

University of Michigan, Ann Arbor, Michigan (United States)

关键词: Corrosion;    Research Programs;    Radioisotopes;    11 Nuclear Fuel Cycle And Fuel Materials;    Nuclear Fuels;   

DOI  :  10.2172/828378
RP-ID  :  EMSP-59849--2000
RP-ID  :  FG07-97ER14816
RP-ID  :  828378

美国|英语

来源: UNT Digital Library

【 摘 要 】

This research program is focused on developing models of the long-term alteration of UO2 in spent nuclear fuel. The models are based on detailed studies of the long-term corrosion products of naturally occurring UO2+x under oxidizing conditions. The natural samples range in age from a few millions of years (Colorado Plateau in the U.S.A.) to approximately 2 billion years (the Oklo natural reactors in Africa). This research program identifies the phases that form, evaluates their stability and the ability of U6+-phases to incorporate key radionuclides. We have focused on radionuclides (237Np, 239Pu, 99Tc, 79Se and 129I) that make important contributions to exposure dose during geologic disposal.