In his State of the Union speech, President Barack Obama said new nuclear power plants must be part of the nation’s energy portfolio; Republicans cheered, Democrats grumbled. Is it realistic to build such plants? Is nuclear power safe? Is it too costly? Should plants be built without a plan to dispose of the waste? Was the Maine Yankee nuclear plant in

Wiscasset, which closed after experiencing problems with steam tubes, an asset for Maine? Or did it end up costing rate payers too much?