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Memory Alpha

Sabotaged PXK reactor with replacement circulating pump

The missing original circulating pump

A PXK pergium reactor was a nuclear energy source used in the 23rd century. In 2267, it was used in the Janus VI pergium mining colony to provide all of its heat, air, and life support.

In that year, the silicon-based lifeform known as a Horta stole the main circulating pump from the Janus VI reactor, an action which would cause the reactor to go supercritical. Captain Kirk asked Montgomery Scott if they had any replacement parts on board the USS Enterprise, but Scott responded that the reactor had been out-of-date for roughly 20 years, forcing him to construct a makeshift replacement pump.

Eventually, Spock was able to make contact with the Horta via mind meld, and the Horta agreed to return the circulating pump. (TOS: "The Devil in the Dark")

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