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- W1611861717 abstract "Shield optimization studies were conducted for a thermionic reactor, that uses heat pipes for both reactor heat removal and radiator. The radiator was placed on the opposite side of the payload to more efficiency reject the heat without affecting the LiH shadow shield. Neutron scattering off the radiator was an important consideration. The shield that was added to reduce the neutron scattering by itself became a source for scattering. By proper shield material selection, the radiator and radiator shield scattering contribution was reduced. A direct shield material selection trade study was performed, and tungsten was selected for the gamma ray shield. The direct shield mass was then optimized with respect to separation distance, using both the mass of the boom and electrical cables. A very important conclusion was that the optimum system mass depends on the boom structural criteria that is used. At a separation distance of 5 m the shield mass was calculated to be 1,445 kg. At 10 m, the shield mass drops to 700 kg; however, the additional electrical cable mass was 73 kg and the additional boom mass was 335 kg (or 67 kg/m) for a total mass of 1,108 kg. The boom minimum resonant structural frequency was 10 Hz." @default.
- W1611861717 created "2016-06-24" @default.
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- W1611861717 date "1992-01-01" @default.
- W1611861717 modified "2023-09-27" @default.
- W1611861717 title "Heat pipe thermionic reactor shield optimization studies" @default.
- W1611861717 doi "https://doi.org/10.1063/1.41816" @default.
- W1611861717 hasPublicationYear "1992" @default.
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