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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
J. T. Mihalczo
Nuclear Science and Engineering | Volume 56 | Number 3 | March 1975 | Pages 271-290
Technical Paper | doi.org/10.13182/NSE75-3
Articles are hosted by Taylor and Francis Online.
The spatial distribution of the neutron importance in bare and natural-uranium-reflected uranium (∼93.2 wt% 235U) and plutonium (∼4.7 at % 240Pu) metal spheres was measured using 252Cf neutron sources. The spatial distribution of the fission density from activation measurements in the bare spheres and those previously measured for the reflected spheres are presented.Comparison of these distributions with those from S16 transport theory calculations showed that the measured and calculated results agreed very well for the bare spheres and in the central core of the reflected spheres. The disagreement in the natural uranium reflector increased with radius and attained values as large as ∼35% at the outer surface. The sensitivity of the calculations to the cross sections is examined.These measurements were undertaken to properly account for spatial effects in the point reactor kinetics description of Rossi-α measurements. The spatial-effects factors obtained from these measurements, which multiply the correlated amplitude of the Rossi-α measurement, were 1.123, 1.109, 1.163, and 1.214 for the bare uranium, bare plutonium, reflected uranium, and reflected plutonium spheres, respectively. The error in these values is ± 0.010.