A sign announces the closing of the observation center for the Three Mile Island nuclear plant in ... [+] Pennsylvania, following an accident on March 28, 1979. A pump failed in the reactor cooling system, shutting down the plant and threatening a nuclear meltdown. (Photo by Owen Franken/Corbis via Getty Images) Corbis via Getty Images Nvidia stock has soared 156% in 2024. Meanwhile, shares of Constellation Energy — a provider of nuclear power services and owner of the Three Mile Island facility that suffer ...