UPDATE 1-U.S. nuclear power plants prepare for Hurricane Florence

Several nuclear power reactors in North and South Carolina and Virginia on Tuesday started to prepare for Hurricane Florence, which is expected to hit the coast as a major hurricane on Friday. The storm threatened to make landfall with massive waves and winds of up to 130 mile per hour (209 km per hour), making it a Category 3 or 4 storm on a five-step scale, the National Hurricane Center in Miami wa