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2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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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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Latest News
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).
J. C. Manaranche, D. Mangin, L. Maubert, G. Colomb, G. Poullot
Nuclear Science and Engineering | Volume 71 | Number 2 | August 1979 | Pages 154-163
Technical Paper | doi.org/10.13182/NSE79-4
Articles are hosted by Taylor and Francis Online.
The development of pressurized water reactors and boiling water reactors in the world necessitates complete critical experiments on this type of fuel for the validation of the methods used in criticality calculations and to resolve the various related problems. This paper presents the first results obtained at the Critical Mass Laboratory at Valduc during critical approaches achieved with lattices of 4.75-wt%-235U-enriched UO2 rods in water. Four square pitches (12.6, 16.0, 21.0, and 25.2 mm) and three triangular pitches (13.5, 17.2, and 22.6 mm) have been studied, and various configurations with fuel rods removed were investigated. Benchmark calculations are presented.
