Monticello nuclear plant to be shut down after second radioactive water leak.

Xcel Energy will temporarily shut down its Nuclear Generating Plant in Monticello, Minnesota, to repair a recurring leak of radioactive water containing tritium, a mildly radioactive form of hydrogen. The leak is fully contained on-site and has not been detected beyond the facility or in any local drinking water. The incident comes after a previous leak of 400,000 gallons of radioactive water in November 2020, which was only made public in March 2021. State officials said they waited to inform the public because they wanted to understand the full scope of the leak and Xcel had not immediately identified the source.