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GRAND RAPIDS (WZZM) -- U.S. Senator Debbie Stabenow says the Palisades nuclear power plant in southwest Michigan should stay offline until recent problems there are fixed "permanently."

A water leak was discovered at the plant last Sunday, and 79 gallons of radioactive water entered Lake Michigan.

Republican Congressman Fred Upton, who represents the district and chairs the House Committee on Energy and Commerce, will tour the plant Monday with one of five members of the U.S. Nuclear Regulatory Commission.

Upton said the situation at the plant "is not acceptable and demands full accountability."

Friday, democratic U.S. Senator Debbie Stabenow said she too has written the company operating the plant, Entergy, urging it remain closed until the problem is fixed permanently.

"I hope they can fix it, I hope we can see a safe facility going forward, but I'm very concerned about this," Stabenow said in Grand Rapids.