zero-power reactor

zero-power reactor

[′zir·ō ¦pau̇·ər rē′ak·tər]
(nucleonics)
An experimental nuclear reactor operated at low neutron flux and at a power level so low that no forced cooling is required; fission product activity in the fuel is then sufficiently low to permit handling the fuel after use.
References in periodicals archive ?
never progressed past that point, but a year later, when the Canadians began to explore nuclear technology, their first experiment, a zero-power reactor that began operating in September 1945, used heavy water for moderation.