Meanings

light-water nuclear reactor

core meltdown

boiling-water reactor

wind furnace

hearth

electric furnace

nuclear fusion reactor

fireplace or hearth dug into the ground or floor

sunken hearth

containment vessel

advanced thermal converter reactor

nuclear-powered satellite

swimming pool reactor

magnox reactor

fast reactor

decommissioning (of a nuclear reactor, furnace, incinerator etc.)

high-temperature gas-cooled reactor

thermal-neutron reactor

heavy-water reactor

first lighting of the hearth in a Zen temple (first day of the 10th or 11th month)