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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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Powering the future: How the DOE is fueling nuclear fuel cycle research and development
As global interest in nuclear energy surges, the United States must remain at the forefront of research and development to ensure national energy security, advance nuclear technologies, and promote international cooperation on safety and nonproliferation. A crucial step in achieving this is analyzing how funding and resources are allocated to better understand how to direct future research and development. The Department of Energy has spearheaded this effort by funding hundreds of research projects across the country through the Nuclear Energy University Program (NEUP). This initiative has empowered dozens of universities to collaborate toward a nuclear-friendly future.
J. F. Carew
Nuclear Science and Engineering | Volume 104 | Number 4 | April 1990 | Pages 396-401
Technical Paper | doi.org/10.13182/NSE90-A23737
Articles are hosted by Taylor and Francis Online.
An analytic method for analyzing prompt-critical reactivity transients for a nonlinear energy feedback model is derived. The nonlinear point kinetics equation is replaced by a least-squares equivalent linear equation, and an approximate time-dependent reactivity is determined analytically. Assuming the power burst is infinitely sharp and symmetric about the peak, the transient peak energy, power, and pressure are expressed in terms of the inserted reactivity. The resulting expressions allow the definition of an equivalent step reactivity transient that preserves both the peak energy and power. The method is applied to the case where the feedback nonlinearity is small, and simplified expressions for the transient peak energy and power are determined and shown to approximate the known exact results in the case of a ramp reactivity insertion and a linear energy feedback model.
