Constellation Energy rallied after it announced plans to partially reopen the nuclear power plant at Three Mile Island. Is this a positive sign for NuScale Energy? Wall Street has a habit of getting overly excited by the news, both to the downside and the upside. So the oneday rally in Constellation Energy's (CEG 2.15%) share price after a news release about reopening part of the nuclear power plant at Three Mile Island needs to be taken with a grain of salt. And yet the excitement still might be a sign of ...