The Light-Weight Radioisotope Heater Unit (LWRHU) will be used on the NASA Galileo Mission to provide thermal energy to the various systems on the orbiter and probe that are adversely affected by the low temperature a spacecraft encounters during a long interplanetary mission. Using these plutonia-fueled sources in 1-W increments permits employment of a single design and provides the spacecraft user the option of how many to use and where to position them to satisfy the proper thermal environment for components requiring such consideration. The use of the radioisotope (sup 238)Pu in these devices necessitates the assessment of postulated radiological risks which might be experienced in case of accidents or malfunctions of the space shuttle or the spacecraft during phases of the mission in the vicinity of the earth. Included are data for the design, mission descriptions, postulated accidents with their consequences, test data, and the derived source terms and personnel exposures for the various events. 4 refs., 4 figs., 1 tab.


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    Light-Weight Radioisotope Heater Unit (LWRHU) Impact Tests

    Reimus, M. A. H. / Rinehart, G. H. / Herrera, A. et al. | British Library Conference Proceedings | 1998


    Light-weight radioisotope heater unit (LWRHU) impact tests

    Reimus, M. A. H. / Rinehart, G. H. / Herrera, A. et al. | American Institute of Physics | 1998


    Radioisotope heater unit

    Tsuyuki, G. T. | NTRS | 2002


    Light Weight Radioisotope Heater Unit (LWRHU) Production for the Cassini Mission

    Rinehart, G. H. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1997


    APOLLO Lunar Radioisotope Heater Safety Evaluation

    F. L. Baker / W. J. Dalby / G. H. Elkins et al. | NTIS | 1969