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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.
Donald R. Olander, Albert J. Machiels, Eugen Muchowski
Nuclear Science and Engineering | Volume 79 | Number 2 | October 1981 | Pages 212-227
Technical Paper | doi.org/10.13182/NSE81-A27410
Articles are hosted by Taylor and Francis Online.
Natural salt deposits contain small brine inclusions that can be set into motion by a temperature gradient arising from storage of nuclear wastes in the salt. Inclusions totally filled with liquid move up the temperature gradient, but cavities that are filled partly with liquid and partly by an insoluble gas move in the opposite direction. The velocities of these gas-liquid inclusions are calculated from a model that includes heat transport in the gas-liquid-solid composite medium, vapor transport of water in the gas bubble, and molecular and thermal diffusion of salt in the liquid phase as the principal mechanisms causing cavity motion. An analytical expression for the inclusion velocity is obtainable by approximating the cubical cavity in the solid as a spherical hole containing a central gas bubble and an annular shell of liquid. The theory predicts a change in the migration direction at a critical volume fraction gas in the cavity. For NaCl, the theory gives the velocities of migration down the temperature gradient which are in satisfactory agreement with experimental data.