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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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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.
G. Noguere, P. Archier, C. De Saint Jean, B. Habert
Nuclear Science and Engineering | Volume 172 | Number 2 | October 2012 | Pages 164-179
Technical Paper | doi.org/10.13182/NSE11-72
Articles are hosted by Taylor and Francis Online.
This paper presents simple models developed to generate covariances between observable and latent variables. The methodology consists of using “variance penalty” terms as a measure of the contribution of the latent-variable uncertainties to the variance of a given calculated quantity z. This approach provides a useful understanding of how the observable and latent variables are related to each other and ensures the positive-definiteness of the covariance matrix. This work has been implemented in the nuclear data assimilation tool CONRAD. Performances of analytic and Monte Carlo models are illustrated with covariances calculated for neutron-induced capture reactions on stable xenon isotopes (124Xe, 126Xe, 128Xe, 129Xe, 130Xe, 132Xe, and 134Xe).