DETROIT (AP) — Seventy-nine gallons of “very slightly radioactive water” from a leaky tank at the troubled Palisades Nuclear Power Plant spilled into Lake Michigan, a Nuclear Regulatory Commission spokeswoman said Monday.
There is no risk to human health because the radioactive material was further diluted when it entered a storage basin before flowing into the lake, NRC spokeswoman Viktoria Mitlyng told The Associated Press. She said there is “absolutely” no risk to human health.
The plant is 80 miles east-northeast of Chicago in Van Buren County’s Covert Township. It’s been under heightened Nuclear Regulatory Commission attention because of a series of breakdown over two years.
The southwestern Michigan plant was shut down Sunday after officials discovered a growing leak the day before in a water storage tank.
Safety investigators reported Monday that 79 gallons from the 250,000-gallon tank leaked into a basin holding thousands of gallons of non-radioactive water, Mitlyng said. She said that water from the tank is no longer reaching the lake.
The “very slightly radioactive water” contained small amounts of tritium and may have had trace amounts of cobalt and cesium, she said. It was further diluted to the degree that it would have been undetectable at the point where it entered Lake Michigan, she said.
Mitlyng said the NRC is sending a metallurgy expert to the plant to inspect the leaky tank once it is fully drained and pinpoint the source of the leak.
The same tank sprang a leak in 2012, and some of the water caused water seepage into the plant’s control room. Afterward, the NRC set a cap of 38 gallons a day on how much water could leak each day, Mitlyng said.
The leak rate went from about 1 gallon on Friday to about 90 gallons Saturday, she said, leading to the shutdown.