Although Galileo and Ulysses were launched one year apart, and even though both used the same launch system and the same RPS design, the Ulysses review was just as involved as the Galileo review because the Ulysses GPHS-RTG was oriented 90 degrees from those on the Galileo spacecraft. In contrast, for the Apollo missions the first safety review was exhaustive, but subsequent Apollo safety reviews were abbreviated, focusing on mission and system differences. Pioneer 10 and 11 were reviewed together, as were Viking 1 and 2, LES 8 and 9, and Voyager 1 and 2.
Although the committee did not have the time or information necessary to assess launch rate issues, the committee is confident that the short supply of 238Pu is by far the most urgent issue that must be addressed to carry out NASA’s plans for RPS missions. Still, a detailed investigation of launch rate issues would be advisable because inattention could eventually allow them to become a mission-limiting factor.
DOE (Department of Energy). 2000. Final Programmatic Environmental Impact Statement for Accomplishing Expanded Civilian Nuclear Energy Research and Development and Isotope Production Missions in the United States, Including the Role of the Fast Flux Test Facility. DOE/EIS-0310. December 2000. Washington, D.C.: U.S. Department of Energy.
DOE. 2001. Record of Decision for the Programmatic Environmental Impact Statement for Accomplishing Expanded Civilian Nuclear Energy Research and Development and Isotope Production Missions in the United States, Including the Role of the Fast Flux Test Facility. Federal Register 66(18): 7877-7887. Available at http://www.epa.gov/EPA-IMPACT/2001/January/Day-26/i2271.htm.
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JHU (Johns Hopkins University). 2008. Solar Probe+ Mission Engineering Study Report. Laurel, Md.: Johns Hopkins University Applied Physics Laboratory.
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