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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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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.
Hongyu Zhou, Guangshun Huang
Nuclear Science and Engineering | Volume 125 | Number 1 | January 1997 | Pages 61-74
Technical Paper | doi.org/10.13182/NSE97-A24254
Articles are hosted by Taylor and Francis Online.
Combining the usual prompt gamma radiation measurement technique and the lifetime correction method for delayed gamma radiation yield measurements allows the study of total discrete gamma radiation from 14.9-MeV neutron-induced 27Al(n,xγ) reactions. The following are identified: 21 prompt gamma lines from (n,n&primeγ), (n,αγ), (n, nαγ), (n,nαγ), (n,pnγ), (n,dγ), and (n,2nγ) reactions; 5 delayed gamma lines from one isomeric state produced in the (n, α) reaction; and the β- decay products of the residual nuclei in the (n,p) and (n, α) reactions. Their differential production cross sections at 55, 90, and 140 deg are determined simultaneously. Compared with previous experimental results, one sees a clear advantage in separating the delayed component from the mixed gamma-ray peaks, which consist of prompt and delayed gamma radiation; completely clean prompt gamma-ray production data are obtained. The accurate (n,p) cross sections and a preliminary (n, α) cross section are determined from relative differential production cross sections. They are in good agreement with the known activation data obtained from previous measurements and evaluations. The isomeric cross section for the 472.3-keV state of 24Na is also given. The present result shows that the total gamma radiation measurement method is valuable not only to acquire accurate gamma-ray production data but also to acquire accurate neutron activation data with a wide half-life range.