The melting temperature of irradiated oxide fuel

Melting Temperature of Mixed Oxide Fuels for Fast Reactors.

“…For comparison, Tables 2 and 3 give the measured temperatures and as-fabricated compositions of a JOYO Mk-I core fuel reported by Tachibana et al 4) and on fuel irradiated in Rapsodie reported by Komatsu et al 5) In both tables, the effects brought to fuel composition and O/M ratio have been evaluated as in Table 1 by the ORIGEN-2 code and by linear increasing O/M ratio model.…”

“…Details of the apparatus used, and the procedure are described elsewhere. 3,5,6) Measured temperatures on a fuel subassembly irradiated by serving as JOYO Mk-I driver are given in Table 1 covering different fuel burnups, together with the as-fabricated compositions of the specimen. The values of O/M ratio are based on the linear increasing O/M model described in Sec.…”

Melting behavior of (Th,U)O2 and (Th,Pu)O2 mixed oxides

“…ThO2 3650-3675 3663 ± 100 Benz et al [6] 3643 ± 30 Rand et al [7] 3573 ± 100 Lambertson et al [8] 3651 ± 17 Ronchi et al [9] 3624 ± 108 Bohler et al [10] UO2 3050-3075 3113 ± 20 Lyon et al [11] 3138 ± 15 Latta et al [12] 3075 ± 30 Ronchi et al [13] 3120 ± 30 Adamson et al [14] 3,113.15 MATPRO [15] 3138 ± 15 Komatsu et al [16] 3120 ± 30 ORNL [17] 3050 ± 55 Böhler et al [18] PuO2 2800-2825 2663 ± 20 Lyon et al [11] 2701 ± 35 Adamson et al [14] 2647 MATPRO [15] 2718 Komatsu et al [16] 2701 ± 35 ORNL [17] 2843 Kato et al [19] Table 4: MD calculated enthalpy increments (in J/mole) of solid and liquid phases of (Th,U)O2 and (Th,Pu)O2 MOX are fitted to equation (7) and (8), respectively and coefficients are enlisted.…”

“…Experimentally reported melting temperatures of UO2 vary from 3050 K to 3138 K ( Table 2) [11][12][13][14][15][16][17][18]. The melting point of UO2 given in MATPRO [15] is 3113.15 K, based on the equations for the solids and liquids boundaries of the UO2-PuO2 phase diagram given by Lyon et al [11].…”

“…Also, some other researchers [11,[14][15][16][17] [19,20] has the advantages of much shorter heating duration and quasicontainerless conditions and avoids most of the typical problems of traditional furnace techniques. Our MD calculated melting temperature, which lies between 2800 K and 2825 K, is lower than the melting point reported by Bruycker et al [20] and higher than the recommended value by ORNL [17] but matches well with the value reported by Kato et al [19].…”