Sodium Heat Pipe Module Processing For the SAFE-100 Reactor Concept

Details Sodium Heat Pipe Module Processing For the SAFE-100 Reactor Concept Sodium Heat Pipe Module Processing For the SAFE-100 Reactor Concept

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..699..148m&link_type=abstract

SPACE TECHNOLOGY AND APPLICATIONS INTERNAT.FORUM-STAIF 2004: Conf.on Thermophys.in Microgravity; Commercial/Civil Next Gen.Space

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Spaceborne And Space Research Instruments, Apparatus, And Components, Thermal Instruments And Apparatus

Scientific paper

To support development and hardware-based testing of various space reactor concepts, the Early Flight Fission-Test Facility (EFF-TF) team established a specialized glove box unit with ancillary systems to handle/process alkali metals. Recently, these systems have been commissioned with sodium supporting the fill of stainless steel heat pipe modules for use with a 100 kW thermal heat pipe reactor design. As part of this effort, procedures were developed and refined to govern each segment of the process covering: fill, leak check, vacuum processing, weld closeout, and final ``wet in''. A series of 316 stainless steel modules, used as precursors to the actual 321 stainless steel modules, were filled with 35 +/-1 grams of sodium using a known volume canister to control the dispensed mass. Each module was leak checked to <10-10 std cc/sec helium and vacuum conditioned at 250 °C to assist in the removal of trapped gases. A welding procedure was developed to close out the fill stem preventing external gases from entering the evacuated module. Finally the completed modules were vacuum fired at 750 °C allowing the sodium to fully wet the internal surface and wick structure of the heat pipe module.

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