subcritical

[ suhb-krit-i-kuhl ]

adjective

1. Physics. pertaining to a state, value, or quantity that is less than critical, especially to a mass of radioactive material.
2. being of less than critical importance.

subcritical

/ sʌbˈkrɪtɪkəl /

adjective

1. physics (of a nuclear reaction, power station, etc) having or involving a chain reaction that is not self-sustaining; not yet critical

Word History and Origins

Origin of subcritical¹

First recorded in 1940–45; sub- + critical

Example Sentences

To the east that spring, Russian troops frequently shelled the Kharkiv Institute of Physics and Technology, damaging a hall containing a subcritical nuclear reactor.

From Science Magazine

Washington, however, is preparing to conduct next year at the Nevada Test Site two so-called subcritical experiments involving fissile materials in amounts too small to ignite a nuclear explosion.

From Reuters

National Nuclear Security Administration, which oversees the U.S. nuclear arsenal, announced in June that the United States is open to having international observers monitor the subcritical experiments.

From Reuters

Scorpius will be fully assembled in an underground complex at the facility formerly known as the Nevada Test Site, where scientists have been conducting subcritical experiments since 1995 and nuclear testing dates to 1951.

From Seattle Times

“We are looking forward to establishing this capability in 2027, conducting the first subcritical experiments using these new capabilities to support our nuclear deterrent and demonstrate once again our technical prowess as a nation,” said Dave Funk, vice-president for Enhanced Capabilities for Subcritical Experiments at the Nevada National Security Site.

From Seattle Times