Galileo light-weight radioisotope heater units design and safety analysis [electronic resource].
- Washington, D.C. : United States. Office of the Assistant Secretary for Nuclear Energy, 1990.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: (7 pages) : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory
United States. Office of the Assistant Secretary for Nuclear Energy
United States. Department of Energy. Office of Scientific and Technical Information
- The Light-Weight Radioisotope Heater Unit (LWRHU) provides thermal energy to temperature sensitive components aboard the orbiter/probe of the Galileo Spacecraft during its multiyear interplanetary mission. Heat is derived from the radioisotopic decay of 238-plutonium. A power of 0.56 watts/gram of radioisotope, a half-life of 88 years, and no moving parts permitted a robust, long-lived, compact heat source design. A single l-w design provided small thermal increments, with options in the number and placement, to satisfy the needed thermal environment for the spacecraft components. Radioisotope use in these devices necessitated the assessment of postulated radiological risks in accidents or malfunctions of the space shuttle or the Galileo spacecraft during near earth mission phases. Included in this document are data for the design, postulated accidents with their consequences, test data, and the derived source terms and personnel exposures for the various events. 5 refs., 1 fig., 1 tab.
- Published through SciTech Connect.
American Nuclear Society winter meeting, Washington, DC (USA), 11-15 Nov 1990.
Johnson, E.W.; Zocher, R.W.
- Funding Information:
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