USA Q&A: Illinois nuclear plant loses power. What got vented into the air?

A nuclear plant in Illinois shut down one reactor Monday after a transformer failed. The problem is growing for aging nuclear plants. But in this case, the public was never in danger, officials say.  

By , Staff writer

Robert Ray/AP/File

Nuclear regulators are keeping close tabs on an Illinois nuclear plant after a loss of off-site power to the plant Monday morning.