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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
February 2025
Latest News
WEST claims latest plasma confinement record
The French magnetic confinement fusion tokamak known as WEST maintained a plasma in February for more than 22 minutes—1,337 seconds, to be precise—and “smashed” the previous record plasma duration for a tokamak with a 25 percent improvement, according to the CEA, which operates the machine. The previous 1,006-second record was set by China’s EAST just a few weeks prior. Records are made to be broken, but this rapid progress illustrates a collective, global increase in plasma confinement expertise, aided by tungsten in key components.
Dong H. Nguyen, David Salinas
Nuclear Science and Engineering | Volume 60 | Number 2 | June 1976 | Pages 120-130
Technical Paper | doi.org/10.13182/NSE76-A26868
Articles are hosted by Taylor and Francis Online.
The finite element method was used to solve a nonlinear two-dimensional reactor dynamics equation. The system considered is a superprompt critical fast reactor, subjected to the prompt feedback condition. Various nonuniform initial disturbances allow the examination of the spatial dependence of neutron dynamics. Under exact numerical treatment, the quadratic nonlinearity in the dynamics equation transforms into an N × N2 matrix operator, where N is the system degree of freedom. This large matrix size taxes heavily on computer time and storage. The results obtained here can be considered as a numerical standard. It is found that there is a strong spatial dependence during the early phase of the transient, and that this dependence increases with increasing discontinuity in initial conditions. The transient behavior at each point in space also depends strongly on the spatial distribution and magnitude of the initial disturbances.