skip to main content

Title: Design Modifications for Increasing the BOm and EOM Power Output and Reducing the Size and Mass of RTG for the Pluto Mission

Paper presented at the 29th IECEC in Monterey, CA in August 1994. A companion paper analyzed the effect on source modules for three specific fuel options, and compared the predicted power output with JPL's latest goals for the Pluto Fast Flyby (PFF) mission. The results showed that a 5-module RTG cannot fully meet JPL's goals with any of the available fuels; and that a 6-module RTG more than meets those goals with Russian fuel, almost meets them with U.S. (Cassini-type) fuel, but still falls far short of meeting them with the depleted fuel from the aged (1982) Galileo spare RTG. The inadequacy of the aged fuel was disappointing,because heat source modules made from it already exist, and their use in PFF could result in substantial cost savings. The present paper describes additional analyses which showed that a six-module RTG with the aged fuel can meet JPL's stipulated power margin with a relatively simple design modification, that a second design modification makes it possible to recover all of the mass and size penalty for going from five to six heat source modules, and that a third modification could raise the EOM power margin to 16%.
; ;
Publication Date:
OSTI Identifier:
Report Number(s):
AIAA-94-4129-CP; FSC-ESD-217-94-531
Orbital ID: 8572; Call Number: ESD files
Resource Type:
Technical Report
Fairchild Space and Defense Corporation; Germantown, MD
Research Org:
Fairchild Space and Defense Corporation
Sponsoring Org:
NE Office of Space and Defense Power Systems
Country of Publication:
United States
NESDPS Office of Nuclear Energy Space and Defense Power Systems; Pluto Fast Flyby; Analysis; Power Performance