Crews are working to bring the Monticello Nuclear Plant back to full operations after a reactor shut down Wednesday morning. Xcel Energy officials say the reactor went offline after the system identified an issue with a control valve. Officials added the shut down should not impact electric service to customers.

The Trump administration’s latest idea to bring peace to Ukraine is for the U.S. to take control of the country’s power plants, including its nuclear facilities, as an insurance against further aggression by Moscow toward Kyiv.

The White House said taking ownership of Ukrainian plants would give them the “best protection.” The idea faces legal hurdles and operational challenges, and it’s unclear if Ukraine would agree to it.