Thermodynamics and Chemical Behavior of Uranyl Superoxide at Elevated Temperatures.

ABSTRACT: Understanding the alteration mechanisms of UO₂-based nuclear fuel has a range of practical implications for both short- and long-term storage of spent fuel rods and environmental ramifications for the mobility of radioactive material at the Chernobyl and Fukushima sites. The major identified alteration phases on the surface of nuclear waste are analogues of schoepite UO₃·2H₂O, studtite UO₂(O₂)·4H₂O, rutherfordine UO₂CO₃, and čejkaite Na₄UO₂(CO₃)₃. While α-radiolysis has been shown to cause the ingrowth of uranyl peroxide alteration phases, the prevalence of uranyl carbonate phases on solid waste forms has not been mechanistically explained to date, especially

SUBMITTER: Kravchuk DV 

PROVIDER: S-EPMC9928197 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature