Thulium-170 heat source

Technical Report · Thu Sep 06 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/5148872· OSTI ID:5148872

Walter, C E; Van Konynenburg, R; VanSant, J H

An isotopic heat source is formed using stacks of thin individual layers of a refractory isotopic fuel, preferably thulium oxide, alternating with layers of a low atomic weight diluent, preferably graphite. The graphite serves several functions: to act as a moderator during neutron irradiation, to minimize bremsstrahlung radiation, and to facilitate heat transfer. The fuel stacks are inserted into a heat block, which is encased in a sealed, insulated and shielded structural container. Heat pipes are inserted in the heat block and contain a working fluid. The heat pipe working fluid transfers heat from the heat block to a heat exchanger for power conversion. Single phase gas pressure controls the flow of the working fluid for maximum heat exchange and to provide passive cooling.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5148872
• Report Number(s): PATENTS-US-A7578118; ON: DE92016877; PPN: US 7-578118
• Country of Publication: United States
• Language: English

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DAYS LIVING RADIOISOTOPES
DESIGN
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ELEMENTAL MINERALS
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THULIUM 170
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WORKING FLUIDS