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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).
Y. S. Horowitz, A. Dubi, and S. Mordechai
Nuclear Science and Engineering | Volume 59 | Number 4 | April 1976 | Pages 427-429
Technical Note | doi.org/10.13182/NSE76-A26842
Articles are hosted by Taylor and Francis Online.
We describe a new formulation of the Monte Carlo approach to particle transport problems by defining a direct point flux estimator that extracts information from “passage” points rather than “collision” points. The approach leads directly to the radically new concept of track rotation and provides a statistical framework in which it is possible to prove the validity of the track rotation concept in spherically symmetric configurations and the validity of the compensated track rotation concept in nonspherically symmetric configurations. The approach can lead to essentially infinite gains in efficiency over conventional analog Monte Carlo methods that cannot directly estimate the flux at a point.