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2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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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).
David S. Gooden, T. F. Parkinson
Nuclear Science and Engineering | Volume 46 | Number 2 | November 1971 | Pages 169-178
Technical Paper | doi.org/10.13182/NSE71-A22351
Articles are hosted by Taylor and Francis Online.
The space-dependent kinetics of a strongly coupled multiregion cylindrical reactor were studied both theoretically and experimentally. A three-node model was used to calculate the kinetic response in the various regions and these results were compared with two-detector noise measurements. Reasonable agreement was obtained for predicted and measured transfer functions, power spectral densities, coherence functions, and alpha, the ratio of the effective delayed neutron fraction to the prompt neutron lifetime. Differences in the kinetic response of the various regions were clearly evident.