MINNEAPOLIS (AP) — Xcel Energy Inc. is no longer backing a proposed upgrade at its Prairie Island nuclear power plant near Red Wing, the company told Minnesota regulators in a filing.

The Minneapolis-based utility no longer believes that spending $237 million to boost power at the plant’s two reactors is a good deal for customers, the Star Tribune (http://bit.ly/UxBXaM) reported. Xcel told state regulators of its decision in the filing late Monday.