Silkwood (1983)

Fairly accurate recounting of the story of Karen Silkwood, the Oklahoma nuclear-plant worker who blew the whistle on dangerous practices at the Kerr-McGee plant and who died under circumstances which are still under debate. Karen Silkwood lives a free-spirited existence with two friends, Drew Stephens and Dolly Pelliker, who work with her at an Oklahoma nuclear facility. It's only when she discovers she has been exposed to radiation that Karen's conscience awakens, and soon she is digging for evidence of wrongdoing. But her sudden zeal for safer working conditions may come at a high price as she alienates friends...and possibly even puts her own life in peril.