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Nuclear radiation problems, unmanned thermionic reactor ion propulsion spacecraft (1972)

Sawyer, C. D. ; Mondt, J. F. ; Nakashima, A.

In: CASI

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Publication Date: 2019-06-27

Description: A nuclear thermionic reactor as the electric power source for an electric propulsion spacecraft introduces a nuclear radiation environment that affects the spacecraft configuration, the use and location of electrical insulators and the science experiments. The spacecraft is conceptually configured to minimize the nuclear shield weight by: (1) a large length to diameter spacecraft; (2) eliminating piping penetrations through the shield; and (3) using the mercury propellant as gamma shield. Since the alumina material is damaged by the high nuclear radiation environment in the reactor it is desirable to locate the alumina insulator outside the reflector or develop a more radiation resistant insulator.

Keywords: NUCLEAR ENGINEERING

Type: NASA, Washington Proc. of the Natl. Symp. on Nat. and Manmade Radiation in Space; p 292-298

Format: application/pdf

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