Phase separation behaviour of (U_0.7Pu_0.3) O_2−x(1.92<x<2.00) based fuels containing actinides and/or lanthanides

In situ high temperature X-Ray diffraction study of the phase equilibria in the UO2–PuO2–Pu2O3 system

“…7). The extent of the miscibility gap in temperature was found to be in very good agreement with various experimental data for y 0.60, in particular with DTA results at y ¼ 0.30 [6,19,20]. Gu eneau et al and Agarwal et al [14] representations are both in good agreement with HT-XRD data of Markin et Street at y ¼ 0,42 [5].…”

“…2, the available experimental data on critical temperature of fcc phase separation, obtained using DTA and HT-XRD, are plotted as a function of plutonium content. Komeno and Kato are respectively in good agreement at y ¼ 0.30 [19,20]. However, these data differ from those of Koizumi and Nakamura, at y ¼ 0.22 and 0.24, which confirms the difficulties mentioned in the measurements at low plutonium content [18].…”

“…thermal events peaks may extend over a 400 K temperature range. More recently, Kato and Komeno [19,20] DTA was also used by Sari et al [6] and temperatures of phase separation were found to extend from 813 to 913 K for y ! 0.58 only.…”

Effect of oxygen‐to‐metal ratio on densification behavior in the sintering process of PuO2 pellets

“…MOX fuel with Pu content of about 20% or 30% has been developed and produced for fast reactors [1][2][3]. The MOX fuel pellets are produced from UO 2 and PuO 2 powders by a mechanical blending method.…”