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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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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.
A. B. Reynolds, T. J. Thompson, K. M. Henry, E. B. Johnson
Nuclear Science and Engineering | Volume 7 | Number 1 | January 1960 | Pages 1-13
Technical Paper | doi.org/10.13182/NSE60-A25691
Articles are hosted by Taylor and Francis Online.
Reactivity effects of large voids in the reflector of the Pool Critical Assembly, an enriched-uranium, light-water-moderated and -reflected reactor, were investigated. The four reactivity effects studied were (1) variation of reactivity with void size, (2) variation of reactivity with void position on the core-reflector interface, (3) variation of reactivity with the distance between the void and the core, and (4) superposition of void reactivity effects. The variation of reactivity with void size and position on the core-reflector interface was correlated by a statistical weight correlation. An approximate theoretical method based on two-group diffusion theory was developed for calculating both the effect on reactivity and the effect on the neutron flux for a void covering one entire face of a reactor having a rectangular parallelepiped core. The calculated effects on reactivity and on the thermal-neutron fluxes were in reasonable agreement with experimental results.
