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Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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2024 ANS Winter Conference and Expo
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Orlando, FL|Renaissance Orlando at SeaWorld
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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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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.
N. Karayianis, C. A. Morrison, D. E. Wortman
Nuclear Science and Engineering | Volume 40 | Number 1 | April 1970 | Pages 38-50
Technical Paper | doi.org/10.13182/NSE70-A18878
Articles are hosted by Taylor and Francis Online.
The general problem of unfolding is considered from the point of view of linear vector space theory as applied to the more specific problem of spectral unfolding. It is shown that the basis for many of the methods currently in use is an expansion of the unknown spectrum φ(E) in terms of some set of functions wn (E). The coefficients in the expansion are determined by the measured outputs of the detectors. The relationships between the various solutions obtained by using different sets of wn (E) functions are explored. It is shown that the particular solution obtained by using the response functions of the detectors as the wn (E) is effectively an orthogonal decomposition of φ(E) whereas all other expansions are nonorthogonal decompositions. As a result of these properties, the response function expansion, for example, has a bounded square deviation from φ(E) and is less sensitive to errors in the measured detector outputs, whereas other expansions can lead to solutions that may differ violently from φ(E). Conditions under which the latter situation can occur are of a fundamental nature and do not owe their origin to calculational inaccuracies. The square-wave solution is given particular attention and the theoretical basis is investigated of the standard practice of requiring an all positive solution with theoretical outputs that differ least from those measured. It is shown that the correct square-wave representation for φ(E) results in theoretical detector outputs that necessarily differ from those produced by φ(E) itself—possibly by a large amount. Thus, except for cases where this difference is known, a priori, to be small, there is no theoretical basis for this standard practice.