Britain may use the Green Investment Bank it plans to open in April 2012 to help fund nuclear power plants as it shifts the economy toward more low-carbon fuels. The Department for Business, Innovation and Skills said nuclear power investments are under a “high level appraisal” at the development bank and ministers are planning to spur more renewable forms of energy. The department released a document detailing the plans today. The U.K. government estimates it needs 200 billion pounds ($320 billion) to replace its aging power stations. It gets about a fifth of its electricity from nuclear plants and must replace all but one of them within the two decades.