There may be no end in sight for the European power crunch this year, even after the winter season ends. Low nuclear power generation in France, a major producer and exporter of nuclear-powered electricity in Europe, could send power prices on the continent higher in the spring. France gets more than 70 percent of its total electricity from nuclear power generation and is a major exporter of electricity, including to the UK. France’s EDF stopped two nuclear power plants at the end of last year after finding a fault at one during routine...