Maine Public Broadcasting Network: President Obama is calling for $54 billion in loan guarantees for a “new generation of safe, clean nuclear power plants.” His administration also announced this week that it is dropping plans for underground storage of highly radioactive nuclear waste at Yucca Mountain. The position is drawing mixed reactions from around the country, including Maine, where waste from the decommissioned Maine Yankee plant will have to stay for the indefinite future, and in the rest of New England where …