A leak in a discharge pipe caused some contaminated water to seep into the ground at a nuclear plant in York County, according to an event report from the Nuclear Regulatory Commission.
The NRC says Duke Energy notified the agency that more than 100 gallons of water with traces of tritium leaked out of an underground pipe at the Catawba Nuclear Station. Tritium is a mildly-radioactive isotope of hydrogen that is not dangerous unless ingested in large amounts via food or water.
The leak has been classified as a “non-emergency event” by the NRC for now. Spokesman Roger Hannah said Duke found the contamination in the spill was 9,000 picocuries per liter (pCi/L), while the EPA drinking water standard is 20,000 pCi/L.