Nuclear reactor

Nuclear reactors were devices which sped up the rate of decay in radioactive materials in a controlled manner. They were usually found in nuclear power plants.

In 1939, the War Lords used a nuclear reactor to power their base at Drachensberg. The Seventh Doctor set the reactor to overload, destroying the castle and the advanced technology contained in it. (NA: Timewyrm: Exodus)

In the 1970s, Sarah Jane Smith, possessed by Eldrad, took his hand into the nuclear reactor room at the Nunton Experimental Complex. (DW: The Hand of Fear)

In 1986, the nuclear reactor at Chernobyl underwent a meltdown. (DWM: Black Destiny)

Also that year, Snowcap was powered by a nuclear reactor. Ben Jackson helped devise a plan to destroy the Cybermen by using the reactor fuel rods. (DW: The Tenth Planet)

In 2006, Blon Fel-Fotch Passameer-Day Slitheen plotted to destroy Earth by having the nuclear reactor at Blaidd Drwg undergo a meltdown. (DW: Boom Town)