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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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Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Dean Wang, Sicong Xiao
Nuclear Science and Engineering | Volume 190 | Number 1 | April 2018 | Pages 45-55
Technical Paper | doi.org/10.1080/00295639.2017.1417347
Articles are hosted by Taylor and Francis Online.
In this paper, we propose a new prolongation method to replace the conventional flat flux ratio–based scaling approach of coarse-mesh finite difference (CMFD) for updating the flux. The new prolongation method employs a linear interpolation of the scalar flux differences at the coarse-mesh cell edges between the neutron transport and CMFD calculations. This linear prolongation scheme, called lpCMFD, can greatly improve the stability of CMFD, particularly for problems with large optical thickness. A detailed convergence study of lpCMFD based on Fourier analysis and numerical testing shows that lpCMFD is unconditionally stable and effective for a wide range of optical thicknesses.
