supercritical reactor(redirected from Supercritical water reactor)
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supercritical reactor[¦sü·pər′krid·ə·kəl rē′ak·tər]
A nuclear reactor in which the effective multiplication constant is greater than 1 and consequently a reactor that is increasing its power level; if uncontrolled, a supercritical reactor will undergo a sudden and dangerous rise in power level.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.