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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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.
R. S. May, J. M. Sorensen, R. E. Engel
Nuclear Science and Engineering | Volume 103 | Number 1 | September 1989 | Pages 81-93
Technical Paper | doi.org/10.13182/NSE89-A23662
Articles are hosted by Taylor and Francis Online.
Plant transient calculations for reactor accidents and operational transient events must be performed and evaluated despite uncertainties in input data, empirical correlations, modeling assumptions, and evaluation criteria. The use of best-estimate analysis in conjunction with systematic evaluation of uncertainties provides an alternative to bounding analyses that may introduce unnecessarily large conservatisms. A methodology has been developed that combines established techniques for statistical analysis to deal with a general class of problems having uncertainties both in the evaluation criterion and the modeling parameters. Response surface and Monte Carlo sampling methods are used to determine the probability density function of the key output variable. This function is in turn combined with a probabilistic form of the evaluation criterion to estimate the probability that the criterion may be violated. The methodology is applied to an evaluation of the likelihood that high-pressure safety valves would be challenged by increasing pressure transient events in a boiling water reactor. Plant transient results are obtained from RETRAN-02 calculations, and safety valve characteristics are obtained from test data.