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Courtney Rogge Week 2: January 25 th , 2007. Power Nuclear Power Capabilities. Power Source. Power Management & Distribution (PMAD). Power Conversion. Nuclear Power. Needs Safe, Reliable Power Source Space Transportation & Surface Applications Nuclear Options
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Courtney RoggeWeek 2: January 25th, 2007 PowerNuclear Power Capabilities
Power Source Power Management & Distribution (PMAD) Power Conversion Nuclear Power • Needs • Safe, Reliable Power Source • Space Transportation & Surface Applications • Nuclear Options • Nuclear Dynamic Power Conversion • Radioisotope Thermoelectric Generators (RTG) • Stirling Radioisotope Generators (SRG)
Nuclear Power Capabilities Robert Abelson, et al; Ref. 4 Lee Mason; Ref. 5
Stirling Radioisotope Generator (SRG) Thermopile and end form closed circuit Gen Purpose Heat Source (GPHS) Fins for heat radiation Stirling Converter Fuel: Pu-238 Half-life ~ 87.7yrs Generator Housing Radiator Fin Radiator Fin Radioisotope ThermoelectricGenerator (RTG) Figure based on RTG Parametric Model S. Freedman, J. Friedman, J. Schmieder, p16; Ref. 1 Figure based on Schmidt, Wiley and Furlong, slide17; Ref. 2
PMAD Radiator Loads Heat Source Reactor Turboalternator Radiator Gas Cooler Brayton Conversion Cycle Figure based heavily on Lee Mason, et al. Ref. 3
Nuclear Dynamic Power Conversion Lee Mason; Ref. 5
Considerations • SRG • In development • 4 times less fuel than RTGs (Schmidt et al, Ref. 2) • Projected readiness in 2008/2009 (Schmidt et al, Ref. 2) • Nuclear Reactors • SAFETY • Radiation, Maintenance • Don’t want Martian Chernobyl • Don’t want to make Africa glow in the dark if a launch is aborted
References • Freedman, S., and J. Friedman and J. Shmieder. RTG Parametric Study Report for the RTG Study Voyager Task C (U). Valley Forge Space Technology Center; Philadelphia. 1966. • Schmidt, George and Richard Wiley and Robert Furlong. Radioisotope Power Systems for New Frontiers: Presentation to New Frontiers Program Pre-proposal Conference. NASA, Dept of Energy; 13 Nov 2003. • Mason, Lee. A Comparison of Fission Power System Options for Lunar and Mars Surface Applications. Glenn Research Center; Feb 2006.
References • Abelson, Robert D., Ed. Expanding Frontiers with Standard Radioisotope Power Systems. JPL, NASA, California Institute of Technology; 12 Jan 2005. • Mason, Lee. A Comparison of Brayton and Stirling Space Nuclear Power Systems for Power Levels from 1 Kilowatt to 10 Megawatts. Glenn Research Center; 2001.