Abstract
The release of the process gases H 2 , H 2 O, CO, CO 2 , and Ar from alloyed samples of uranium dioxide by oxides of Nb, Ce, Al, Si, and Fe has been studied by means of thermal extraction in vacuum at 1873 K. The niobium concentration in U 1-y Nb y O 2 was 0.06-0.2 mass % (y = 0.001-0.004), the cerium content was 0-25 mass% (y = 0-0.3434), and the content of mullite or Indian red did not exceed 0.25 mass%, the oxygen potential ΔG O2 of the surface of the samples ranged from -400 to -300 kJ/mole at 1873 K. It was determined that the specific gas release from alloyed samples of uranium dioxide depends on the content of niobium, cerium, and impurity carbon as well as the porosity and the radial gradient of the departure from stoichiometry. A model is proposed for the physicochemical and diffusion processes accompanying the thermal extraction of gas from alloyed uranium dioxide.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
