Philadelphia Inquirer: Thirty years ago, the nuclear energy industry in the United States seemed all but headed for the scrapyard. Now it’s poised for a rebirth. The impetus is climate change. Nuclear power is touted as the one major electricity source that’s emission-free and reliable, able to generate massive amounts of power night and day, in wind and calm. But hovering over nuclear’s new dawn is an incident that began at 4 a.m. on March 28, 1979. Deep within Reactor 2 at the Three Mile …