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NASA Glenn Research Center Support of the ASRG ProjectA high efficiency radioisotope power system is being developed for long-duration NASA space science missions. The U.S. Department of Energy (DOE) managed a flight contract with Lockheed Martin Space Systems Company (LMSSC) to build Advanced Stirling Radioisotope Generators (ASRGs), with support from NASA Glenn Research Center (GRC). Sunpower Inc. held two parallel contracts to produce Advanced Stirling Convertors (ASCs), one with DOELockheed Martin to produce ASC-F flight units, and one with GRC for the production of ASC-E3 engineering unit pathfinders that are built to the flight design. In support of those contracts, GRC provided testing, materials expertise, government furnished equipment, inspections, and related data products to DOELockheed Martin and Sunpower. The technical support includes material evaluations, component tests, convertor characterization, and technology transfer. Material evaluations and component tests have been performed on various ASC components in order to assess potential life-limiting mechanisms and provide data for reliability models. Convertor level tests have been used to characterize performance under operating conditions that are representative of various mission conditions. Technology transfers enhanced contractor capabilities for specialized production processes and tests. Despite termination of flight ASRG contract, NASA continues to develop the high efficiency ASC conversion technology under the ASC-E3 contract. This paper describes key government furnished services performed for ASRG and future tests used to provide data for ongoing reliability assessments.
Document ID
Document Type
Conference Paper
Wilson, Scott D.
(NASA Glenn Research Center Cleveland, OH United States)
Wong, Wayne A.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
December 30, 2014
Publication Date
July 28, 2014
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
Meeting Information
Propulsion and Energy Forum 2014(Cleveland, OH)
Funding Number(s)
WBS: WBS 138494.01.99.01
Distribution Limits
Work of the US Gov. Public Use Permitted.
Technology Transfer
Stirling Cycle
Aerospace systems
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