radioisotope heating unit

radioisotope heating unit

[¦rād·ē·ō‚ī·sə‚tōp ′hēd·iŋ ‚yü·nət]
(nucleonics)
A unit that contains a small amount of plutonium and may be carried on board a spacecraft to heat nearby components. Abbreviated RHU.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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