"Those pushing this review are lying about the dump's safety," Berkley said. "They know Yucca Mountain is smack in the middle of an earthquake zone. There's volcanic activity. There's groundwater issues. Have we learned nothing about what's happening now in Japan?"

Berkley added that the investigation is being prompted by the nuclear industry and aided by its "nuked-up buddies" in Congress.

Republicans on the House Energy and Commerce Committee on Thursday sent questions about the Yucca Mountain decision to the Department of Energy and the Nuclear Regulatory Commission.