Design of the EPX-1 AMTEC Cell for the Advanced Radioisotope Power System 1999-01-2654
An Advanced Radioisotope Power System (ARPS) in the 150 watt class is currently under development for space applications. The ARPS is a potential power source for potential NASA missions to Europa in 2003 and Pluto/Kuiper in 2004. The ARPS system, which has been described in recent literature (Hendricks, 1997), will utilize a multi-tube Alkali Metal Thermal to Electric Converter (AMTEC) cell design. Designated EPX-1, the cell is designed to survive ground handling and launch stresses and provide reliable power for the duration of the missions. The EPX-1 AMTEC cell is based on the PX series of demonstration cells (Borkowski, 1997, and Sievers, 1998). The planned operating temperatures and life requirements for these missions have made an all refractory metal design a requirement. Several other design enhancements have been implemented to meet specific mission requirements and improve predicted cell reliability. The EPX-1 cell will use a porous molybdenum capillary system for sodium transport and a Nb-1Zr cylindrical housing as containment. The number of different materials in the cell is being kept to a minimum. The beta”-alumina solid electrolyte (BASE) tubes will utilize both ceramic to metal seals and mechanical restraints to provide a high reliability connection to the cell structure with the metal to metal joints in the Nb-1Zr structure electron beam welded. The final design EPX-1 cell will be tested and the results analyzed to assure that the cells will meet the mission requirements.
Citation: Carlson, M., Hendricks, T., Sievers, R., and Svedberg, R., "Design of the EPX-1 AMTEC Cell for the Advanced Radioisotope Power System," SAE Technical Paper 1999-01-2654, 1999, https://doi.org/10.4271/1999-01-2654. Download Citation
Author(s):
Michael E. Carlson, Terry J. Hendricks, Robert K. Sievers, Robert C. Svedberg
Affiliated:
Advanced Modular Power Systems, Inc
Pages: 7
Event:
34th Intersociety Energy Conversion Engineering Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Sodium
Metals
Ceramics
Electrolytes
Seals and gaskets
Reliability
Welding
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