Nuclear Regulatory Commission Chairman Gregory Jaczko is resigning, effective upon the confirmation of his successor, he announced Monday.
He has served seven years on the commission, including nearly three as chairman.
As chairman, he led the NRC’s response to the accident at the Fukushima nuclear plants in Japan following the 2011 earthquake and tsunami in Sendai.
He said in his written statement that the commission also completed safety reviews for the first new reactor licenses in three decades.
The agency also finalized regulations that require all nuclear plants to be able to withstand a plane crash.
Jaczko conducted administrative, organizational, long-range planning, budgetary and personnel functions of the agency as chairman.