A nuclear plant in northern France shut down three reactors after a swarm of jellyfish clogged pumps used to cool the units, energy group EDF said on Tuesday. Three reactors were taken offline on Monday and output at a fourth was cut by half, EDF said in a statement, leaving just one operating at full capacity. A sixth reactor was already offline for scheduled maintenance. “This situation has no impact on the safety of the facilities, the safety of personnel, or the environment,” EDF...