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Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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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Perpetual Atomics, QSA Global produce Am fuel for nuclear space power
U.K.-based Perpetual Atomics and U.S.-based QSA Global claim to have achieved a major step forward in processing americium dioxide to fuel radioisotope power systems used in space missions. Using an industrially scalable process, the companies said they have turned americium into stable, large-scale ceramic pellets that can be directly integrated into sealed sources for radioisotope power systems, including radioisotope heater units (RHUs) and radioisotope thermoelectric generators (RTGs).
C. W. Stewart, T. L. George
Nuclear Science and Engineering | Volume 64 | Number 1 | September 1977 | Pages 237-243
Technical Paper | doi.org/10.13182/NSE77-A27094
Articles are hosted by Taylor and Francis Online.
A Eulerian finite difference technique is presented for solving the conservation equations for homogeneous compressible fluids. The method uses a Newton-Raphson-type relaxation scheme formed to enable the computation of sharp density gradients at all flow speeds. A derivation of the numerical algorithm and two example problems are presented.