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Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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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.
Rizwan-uddin, J. J. Dorning
Nuclear Science and Engineering | Volume 105 | Number 2 | June 1990 | Pages 123-135
Technical Paper | doi.org/10.13182/NSE90-A23742
Articles are hosted by Taylor and Francis Online.
The nonlinear periodic, quasi-periodic, and chaotic dynamics of a two-phase flow system are studied. The system comprises a vertical channel, heated through its side walls, into which a subcooled liquid enters at the bottom and a two-phase vapor-liquid mixture exits from the top. The system, which is driven by three time-dependent forcing functions (the variable inlet enthalpy, sidewall heat flux, and channel pressure drop), is studied as a nonautonomous nonlinear dynamical system. The numerical scheme used is developed by integrating some of the partial differential equations, first along their characteristics and then along the channel length. The resulting nonlinear functional differential equations are then solved using a special-purpose second-order numerical scheme that treats the complicated nonlinear multiple delay integrals that arise. The results of the numerical simulations and the subsequent analyses show that the nonlinear dyanamics of a nonautonomous heated channel are quite complicated and that this simple system can exhibit periodic, quasi-periodic, and quite frequently chaotic density wave oscillations.