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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Latest News
IAEA again raises global nuclear power projections
Noting recent momentum behind nuclear power, the International Atomic Energy Agency has revised up its projections for the expansion of nuclear power, estimating that global nuclear operational capacity will more than double by 2050—reaching 2.6 times the 2024 level—with small modular reactors expected to play a pivotal role in this high-case scenario.
IAEA director general Rafael Mariano Grossi announced the new projections, contained in the annual report Energy, Electricity, and Nuclear Power Estimates for the Period up to 2050 at the 69th IAEA General Conference in Vienna.
In the report’s high-case scenario, nuclear electrical generating capacity is projected to increase to from 377 GW at the end of 2024 to 992 GW by 2050. In a low-case scenario, capacity rises 50 percent, compared with 2024, to 561 GW. SMRs are projected to account for 24 percent of the new capacity added in the high case and for 5 percent in the low case.
H. T. Hahn, E. M. Vander Wall
Nuclear Science and Engineering | Volume 17 | Number 4 | December 1963 | Pages 613-619
Technical Paper | doi.org/10.13182/NSE63-A18453
Articles are hosted by Taylor and Francis Online.
The behavior was studied of dibutyl phosphoric acid (HDBP) and its complexes in the uranium stripping and tributyl phosphate (TBP) scrubbing operations. The solubilizing effect of TBP upon UO2(DBP)2 is shown. At low concentrations of nitric acid and TBP, UO2(DBP)2 has greater solubility in the aqueous phase. For enriched uranium stripping conditions, the solubility ratio is almost unity, and DBP may partially accompany uranium through the stripping step. The partition of uranium between TBP-Amsco and dilute nitric acid solutions is shown as a function of both HDBP and TBP concentrations. In the region of interest, uranium appears to be extracted as a complex with DBP/U ratio of one. As the DBP/U ratio increases from one to two, solid UO2(DBP)2 appears. Above a ratio of two, and in the presence of TBP, no solids remained after equilibration, indicating additional DBP-TBP complex formation. For the succeeding TBP scrubbing operation, the TBP distribution coefficient between Amsco and aqueous phase is 290. However, pilot plant experiments were unsuccessful in scrubbing to the desired phosphate level due to two effects. Laboratory studies indicated an equilibration time of two minutes, considerably longer than permitted in the pilot plant tests. The presence of an aqueous-favoring phosphorus species was also established. The latter can be removed by absorption on a hydrated zirconium oxide column and the column regenerated with NaOH. The absorption behavior of HDBP and a plant evaporator phosphate contaminant are compared.
