electricity generator florida power light say thursday shut two nuclear power plant irma come ashore powerful hurricane fpl subsidiary nextera energy inc generate enough power 1.9 million home turkey point st. lucie plant along florida atlantic coast 20 feet meter sea level safely shut nuclear plant well advance hurricane-force wind finalize plan shutdown fpl spokesman rob gould tell news conference company adjust plan necessary depend upon path storm gould say would comment exactly plant would take long could shut energy department say late thursday nuclear regulatory commission expect turkey point close friday even st. lucie shut 12 hours late depend storm path irma category hurricane top saffir-simpson hurricane wind scale pack wind 180 miles 290 km per hour present forecast model show hit tip florida sunday morning rake whole state move north peninsula follow couple days miami-based national hurricane center say fpl say invest billion protect electricity grid since 2005 last major hurricane damage power facilities florida grid hurricane-proof irma stay path many fpl customers lose power gould say company serve 10 million power customers across nearly half florida may physically rebuild part power system gould say could take weeks long irma bad fear realize say gould say fpl might turn substations ahead major flood technique could help company restore power fast floodwaters recede rather keep allow storm damage fpl nuclear plant protect thick concrete reinforce steel like many plant around world bolster 2011 fukushima nuclear disaster japan gould say series explosions meltdowns occur fukushima nuclear plant massive earthquake unleash powerful tsunami shut facility cool systems lead meltdowns florida nuclear plant shut ahead hurricane irma