LAKE WYLIE, S.C. -- Federal regulators say more than 100 gallons of water with traces of a radioactive hydrogen isotope have leaked at the Catawba Nuclear Station.

The U.S. Nuclear Regulatory Commission said Wednesday the tritium leak isn’t an emergency, but says the leak could reach groundwater.

The NRC says issue was discovered late Tuesday when workers found a leak in a fiberglass discharge pipe.

Duke Energy, which runs the plant, has started taking steps to fix the problem. The NRC says Duke is putting in a temporary sump pump to try to isolate the leak.

The U.S. Environmental Protection Agency says drinking water that contains tritium can increase the risk of developing cancer.