NASA NTRS · 19740000051
Radioisotope heater
Abstract
One-watt heater unit is about size of flashlight cell and can be safely handled for several minutes without danger. Unit is completely sealed and can withstand buildup of helium pressure from isotope disintegration for up to 30 years. Number of units can be safely grouped together.
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Smith, T. H., III, Evans, D. B., Steinberger, A. J.. 1974-05-01. Radioisotope heater. https://ntrs.nasa.gov/citations/19740000051
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