Is a nuclear renaissance about to begin on the very site of the public relations catastrophe that practically destroyed the industry 45 years ago? Constellation Energy recently announced a deal with Microsoft to restore a retired reactor on Pennsylvania’s Three Mile Island. Microsoft has agreed to purchase energy from the plant for 20 years to power its AI data centers. A U.S. nuclear reactor has never before been brought out of retirement. Nuclear power was once considered the clean energy source of the future, with dozens of new plants coming online in the late ’60s and early ’70s. But in Ma…