Excel Energy is conducting a study that will determine whether or not it keeps its Prairie Island Nuclear Power Plant running or files for early closure.  Citing economic concerns, Excel may close the Red Wing, MN plant earlier than its current 2034 shutdown date.  News reports cited "unexpected increases in costs that could reach $900 million from 2021 to 2034," as a significant reason for considering early closure, a common lament from an industry that has become too expensive and dangerous to remain relevant as the renewable energy revolution overtakes it.