Microstructural evolution of U(Mo)-Al(Si) dispersion fuel under irradiation - Destructive analyses of the LEONIDAS E-FUTURE plates

作者：Leenaers A^*; Van den Berghe S; Van Eyken J; Koonen E; Charollais F; Lemoine P; Calzavara Y; Guyon H; Jarousse C; Geslin D; Wachs D; Keiser D; Robinson A; Hofman G; Kim Y S

来源：Journal of Nuclear Materials, 2013, 441(1-3): 439-448.

DOI：10.1016/j.jnucmat.2013.06.027

Several irradiation experiments have confirmed the positive effect of adding Si to the matrix of an U(Mo) dispersion fuel plate on its in-pile irradiation behavior. E-FUTURE, the first experiment of the LEONIDAS program, was performed to select an optimum Si concentration and fuel plate heat treatment parameters for further qualification. It consisted of the irradiation of 4 distinct (regarding Si content and heat treatments), full size flat fuel plates in the BR2 reactor under bounding conditions (470 W/cm(2) peak BOL power, similar to 70% peak burn-up). After the irradiation, the E-FUTURE plates were examined non-destructively and found to have pillowed in the highest burn-up positions. The destructive post-irradiation examination confirmed that the fuel evolves in a stable way up to a burn-up of 60%U-235. Even in the deformed area (pillow) the U(Mo) fuel itself shows stable behavior and remaining matrix material was present. From the calculation of the volume fractions, the positive effect of a higher Si amount added to the matrix and the higher annealing temperature can be derived.

• 出版日期2013-10
• 单位中国地震局