Moscow's renewed attacks on Ukraine's electricity infrastructure this winter have heightened scrutiny over the Ukrainian Energy Ministry's failure to protect the country's most critical energy facilities near nuclear power sites. Despite more than a year of warnings that the sites were vulnerable to potential Russian attacks, the Energy Ministry failed to act swiftly, current and former Ukrainian officials in Kyiv told The Associated Press. Two years of punishing Russian strikes on its power grid have left Ukraine reliant on nuclear power for more than half of its electricity generation. Especially vulnerable are the unprotected nuclear switchyards located outside the perimeters of its three functioning nuclear plants, which are crucial to transmitting power from the reactors to the rest of the country. The switchyards that handle electrical routing from nuclear power plants are a vital component of Ukraine's nuclear energy infrastructure powering homes, schools, hospitals, and oth