| Popis: |
Pellets of both hyper‐ and hypostoichiometric uranium dioxide were prepared and tested to determine their relative thermal stability. This paper will discuss the materials tested, the test procedure and the test results. In summary, pellets of hyperstoichiometric uranium oxide (O/U = 2.003–2.005) and hypostoichiometric uranium oxide (O/U = 1.995–1.997) were fabricated. For each stoichiometry, fully dense pellets, pellets with a nominal 10 % porosity, and pellets with a nominal 18 % porosity were prepared.The pellets were thermally treated at 1873 K and 2073 K. The composition, microstructure, and density of the treated samples were characterized. The results after thermal treatment have been compared to the pre‐tested pellets. These results will be presented. |
