Xcel Energy’s Prairie Island nuclear plant cleaned up a spill containing a miniscule amount of tritium after a pump circulating condensate failed Friday.An event report filed with the Nuclear Regulatory Commission indicated 27 gallons overflowed onto the ground at the plant near Minneapolis, Minn. The water contained 11.2 parts per billion of hydrazine and 15,000 picocuries per liter of tritium, which is below EPA limits for drinking water.According to the report: "The condensate was released from [the] parts warehouse 1 heating steam system overflow vent. Condensate return pumps failed to operate causing 27 gallons of condensate to back up and overflow onto the ground. A catch basin has been installed and the steam inlet valve has been closed preventing the addition of steam into the system.”Both of the roughly 550 megawatt Westinghouse pressurized water reactors at Prairie Island continued to operate at full power after the leak was found. A spokeswoman told Bloomberg the leak occurred in a building heated by steam from the non-nuclear loop that drives the turbines, and that it did not compromise the safety of workers or the public.