Effects of Irradiation on Thorium and Thorium-Uranium Alloys

Abstract

Effect of Irradiation on the Microstructure of Thorium-15 w/o Uranium Alloy from Melt No. C16F-218 20. Effect of Irradiation on the Microstructure of Thorium-20 w/o Uranium Alloy from Melt No. C16F-229 28 21. Effect of Irradiation on the Microstructure of Thorium-25 w/o Uranium Alloy from Melt No. C16F-220 , 22. Effect of Irradiation on the Microstructure of Thorium-31 w/o Uranium Alloy from Melt No. Y16F-190 30 23. Cracking in Thorium-31 w/o Uranium Alloy Irradiated to 4.1 a/o Burnup at 900°C 24. Probability of Escape of Fission Recoils from Uranium Particles with Slab Geometry as a Function of Particle Thickness 31

Studies on Direct Electrochemical De-Oxidation of Solid ThO2 in Calcium Chloride Based Melts

“…The electrolysis experiments were performed for different time durations, viz. 1, 4, 8, 12 and 16 h [E- (7)(8)(9)(10)(11)]. The current-time profiles of 8 and 12 h electrolysis runs are depicted in Fig.…”

“…[1][2][3][4][5][6][7]9,10 The application of metallic thorium in nuclear reactors has been proposed by various investigators. 1,[3][4][5]7,[11][12][13][14] Nevertheless, the research programme on thorium based alloys as nuclear fuel is less compared to uranium analogues. The preliminary work on thorium based fuels has been started in 1960s.…”

“…1,7 Kittel et al studied the irradiation behaviour of Th-U alloy fuels and reported that the rate of volume increase in thorium based fuels was significantly less compared to uranium based fuels upon irradiation. 11 Thorium based metal fuels have also been proposed in fast neutron accelerator driven subcritical systems (ADS) for recycling minor actinides. The use of thorium in fast neutron ADS is to limit the production of transuranics and easy conversion of 232 Th to 233 U.…”

Materials technology for accelerator production of fissile isotopes

“…Thorium is isotropic and exhibits excellent resistance to irradiation damage even when it contains large concentrations of uranium. [27,28] 3. Thorium has a thermal conductivity more than ten times greater than that of the U02 and Th02 decrease with increasing temperature for temperatures of interest for the AB.…”

IRRADIATION BEHAVIOR OF URANIUM-FISSIUM ALLOYS. EBR-II Project.

“…Swelling at the upper ends of fuel specimens irradiated in NaK has been observed previously. 20 " 22 It is believed to be the result of local overheating due to temperature stratification at the top of the NaK surrounding the specimens. This condition, with its attendant temperature uncertainties, is believed to be largely responsible for the wide scatter in the data relating swelling rates of the alloys to irradiation temperature. "…”