Électricité de France, the French utility originally planning to expand nuclear energy in the U.S. through construction of the French EPR reactor, is backing away from the U.S. market. Having already been left stranded by its US partner, Constellation, at the planned Calvert Cliffs, MD new reactor site, EDF's French chairman and chief executive, Henri Proglio, now says EDF will look for business elsewhere. For EDF, the world's biggest nuclear operator, the U.S. represents "a significant stake but not an essential one," he told The Wall Street Journal in an interview in his central Paris office.