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Nuclear power unit in southwest Michigan shut down after steam release

Cook Nuclear Plant in southwestern Michigan
U.S. Nuclear Regulatory Commission
The D.C. Cook Nuclear Plant in southwestern Michigan.

A steam line rupture at a nuclear power plant in southwestern Michigan forced a utility to shut down one of the two units early Wednesday morning.

Indiana Michigan Power says the steam released was not radioactive, but it did damage a wall at one of the two D.C. Cook Nuclear Plant units.

Bill Schalk with Cook Nuclear Plant says plant operators made the decision to manually shut down the reactor following the rupture.

"When they did that, all the systems responded appropriately as designed, and the reactor was safely shut down," Schalk said.

Schalk says no one was injured, and Cook Unit 1 continues to operate at 100% power.

Inspectors from the U.S. Nuclear Regulatory Commission are investigating the incident.

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