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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
Standards Program
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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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.
R. A. Stark, G. H. Miley
Nuclear Science and Engineering | Volume 92 | Number 1 | January 1986 | Pages 92-97
Technical Paper | doi.org/10.13182/NSE86-A17869
Articles are hosted by Taylor and Francis Online.
A one-dimensional radial hybrid code was written to study the start-up of the field-reversed mirror via neutral beam injection. This code, named FROST (Field-Reversed One-dimensional STart- up), models the plasma as azimuthally symmetric with no axial dependence. A multigroup method in energy and canonical angular momentum describes the large orbit ions from the beam. This method is designed to be more efficient than those employing particle tracking, since the characteristic time scale of the simulation is the ion slowing down time, rather than the much shorter cyclotron period. A time-differentiated Grad-Shafranov equation couples the ion current to massless fluid equations describing electrons and low-energy ions. Flux coordinates are used in this fluid model, in preference to a Eulerian framework, so that coupling of plasma at the two different radii of a closed flux surface can be treated with ease. Since a fluid treatment for electrons is invalid near afield null, a separate model for the electron current was included for this region, which is a unique feature. Results of simulation of injection into a 2XIIB-like plasma are discussed. Electron currents are found to retard, but not prevent, reversal of the magnetic field at the plasma center.