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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
Meeting Spotlight
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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Latest News
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. C. Westmoreland
Nuclear Science and Engineering | Volume 2 | Number 5 | September 1957 | Pages 533-546
Technical Paper | doi.org/10.13182/NSE57-A25423
Articles are hosted by Taylor and Francis Online.
An analysis of compact natural circulation steam generators for nuclear power plants has been made to facilitate the prediction of certain dynamic characteristics of the systems in terms of their pertinent geometric parameters. A simple two-phase annular flow model is proposed to permit analytical solutions for the thermal driving head and friction pressure loss in the riser. The results of this model have been interpreted in terms of the Martinelli correlation and a favorable comparison is presented. The equations from the analysis have been programmed for solution by the IBM 650 digital computer and several steam generator configurations studied with regard to geometric parameters and also thermodynamic operating state. The main consequence of rapid power changes with these specific units is the carryover of moisture to the turbines which implies adequate separator margin can not be provided for. The capability of the evaporator to supply adequate steam for any desired power change has not been questioned; however, it is noted that a reduction in downcomer flow during a transient could reduce its capacity to do so.