The Brunswick plant is near Cape Fear and just south of Wilmington, North Carolina.
The agency said that "plant procedures require operators to shut down the reactor well before hurricane-force winds arrive on site". Two they have backup generators for power and we will rapidly assess any impacts to a nuclear power plant post-storm.
Nuclear plants have procedures that require they shut a safe amount of time before hurricane force winds of at least 74 miles per hour are expected to reach the site.
Florence was downgraded to a Category 1 hurricane as it made landfall near Wrightsville Beach, North Carolina.
One megawatt can power about 1,000 USA homes.
"These facilities have proven their ability to withstand hurricanes and provide electricity to homes and businesses as soon as off-site power is restored and the electricity grid can accommodate the power", he added.
The National Hurricane Center, as of Wednesday, is expecting the storm surge from Florence, for the Wilmington area, to reach between 2.5-4.0 metres (9-13 feet).
With public dread over a Fukushima-like accident in the USA, how will these plants weather this storm?
"They have everything they need to operate the plant safely", he told the News-Observer.
Smith stated that the reactor buildings at Brunswick are virtually impenetrable, with concrete and rebar walls several feet thick.
The locations of nuclear power plants in North and SC.
With a major storm bearing down on these power plants, some thoughts are turning back to 2011, when Japan's Fukushima Daichi nuclear power plant was impacted in the wake of the devastating March 11 natural disaster and tsunami.
Since Fukushima, all USA reactors have been upgraded with additional safety equipment, including portable pumps and generators to keep cooling water circulating through the reactor in case the plant loses offsite power. Heat from the reactors caused hydrogen explosions that ruptured the reactor vessels, releasing radioactivity.
Following that disaster, federal regulators required all US nuclear plants to perform upgrades to better withstand earthquakes and flooding.