In his final news conference as chairman of the U.S. Nuclear Regulatory Commission, Gregory Jaczko said the NRC may not be able to renew licenses for operating nuclear plants for "a few years" because of a federal court ruling, but the practical impact of this will be limited. Jaczko said he expects nuclear reactors that have already applied for 20-year renewal of their operating licenses will be able to continue to operate while the agency addresses the ruling. Jaczko, who announced his impending resignation in May 2012, will lik...