The head of the Nuclear Regulatory Commission says allegations that he mistreats women are, in his words, `'categorically untrue."
NRC Chairman Gregory Jaczko says he has "the utmost respect" for men and women at the nuclear agency, which oversees safety at the nation's 104 commercial reactors.
A Democrat, Jaczko has led the NRC since 2009. He called an impromptu news conference Friday to address months-old claims about his behavior that resurfaced this week in a dispute over the reappointment of Republican Kristine Svinicki to the NRC.
Svinicki was one of four NRC members who told Congress last year that Jaczko was an intimidating bully who was responsible for a tense work environment. They said women felt particularly threatened.
President Barack Obama plans to nominate Svinicki to a new term.