The head of France’s nuclear power giant will step down as nationalization looms.

Jean-Bernard Lévy, the chairman and chief executive of Électricité de France, the French state-backed electricity giant, plans to step down before his term is up next year,

The French government said the previous day that it would renationalize EDF, as the company is known, to give it more control to fix problems plaguing its nuclear power program and shield consumers from soaring energy prices. The French…