Coated particle fuel for radioisotope power systems (RPSs) and radioisotope heater units (RHUs)

Sholtis, Joseph A.; Lipinski, Ronald J.; El‐Genk, Mohamed S.

doi:10.1063/1.57532

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…Sol-gel processing produces virtually no dust contamination, which would reduce deterioration of LANL glove boxes, equipment, and the worker exposure hazard. In the longer-term, coated Pu-238 oxide microspheres would enable the production of revolutionary radioisotope heat sources for RPSs with improved design integration, performance, flexibility, and safety (Sholtis et al, 1999). Compared to granules produced by powder processing, microspheres are smooth and round, promoting coatings with a thin compatibility layer(s) (e.g., porous and/or pyrolytic graphite) and a strong, high-temperature containment barrier (e.g., ZrC or WC).…”

Section: Introductionmentioning

confidence: 99%

Microsphere Plutonium-238 Oxide Fuel to Revolutionize New Radioisotope Power Systems and Heat Sources for Planetary Exploration

Katalenich

Sholtis²

2021

Bulletin of the AAS

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We propose research and development activities supporting the advancement of improved radioisotope heat sources to support future NASA exploration missions such as those to Ocean Worlds. Missions to penetrate ice and explore oceans will require not only high specific power, but also the incorporation of radioisotope heat sources inside of the vehicle itself to use it for heat as well as power. To enable flexible geometries and high volumetric power loadings, microspherebased heat sources are attractive. Sol-gel methods to produce radioisotope microspheres have the added benefit of being a much cleaner fabrication process, reducing hazards during heat source fabrication. Although preliminary efforts have demonstrated that microsphere heat sources can be produced, uncertainty remains around the integrity of coatings, which would significantly enhance the performance and safety of microsphere fuels, as the fuel ages. Continued research and development within the U.S. Department of Energy would provide the information needed to assess the feasibility of advanced, microsphere-based heat sources and to refine the design of future radioisotope power systems (RPS) for exploration missions.

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Section: Introductionmentioning

confidence: 99%