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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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.
Lynn E. Weaver, Robert E. Vanasse
Nuclear Science and Engineering | Volume 29 | Number 2 | August 1967 | Pages 264-271
Technical Paper | doi.org/10.13182/NSE67-A18536
Articles are hosted by Taylor and Francis Online.
This paper presents an approach to reactor control that is a result of modern control theory, and is based on the control philosophy of feeding back all the state variables through constant gain elements. The values of these elements or feedback coefficients depend upon the desired system dynamics which is specified in terms of the system transfer function. Through state variable feedback design, the desired system dynamics can be realized exactly. Simulation studies have shown that, for the models considered, the sensitivity of parameter variations with respect to system dynamics was relatively low. Since this method depends on feeding back all the system variables, it is particularly amenable to the control of multiregion reactors. With the recent emphasis on spatial kinetics, this method of reactor control is the logical next step. Consideration is given to the case when all the state or system variables are not available for measurement.