Atlantic hurricanes, Atlantic Storms, Cape Fear, Cliff Edge, Cliff Edge Barriers, dangers of nuclear, environment, flooding, Flooding design basis, flooding reevaluation, Fukushima, Fukushima lessons learned, Hurricane Florence, loss of power, North Carolina, nuclear, nuclear accident, nuclear disaster, nuclear energy, nuclear meltdown, nuclear power, nuclear reactors, nuclear waste, radioactive waste, Rain, risk management, Spent Nuclear Fuel, Station Blackout, Storm Surge, US NRC
Hurricane Dorian is en route to Brunswick Nuclear Power Station. It appears that it may be ok from the vantage of flooding this time, but what about next time? As of 8 am Thursday morning, one reactor is at 100% and the other at 40%. They are supposed to power down for hurricanes. Flooding isn’t the only hazard. Loss of power is a major hazard. Hurricane Florence struck less than a year ago.
The US Nuclear Regulatory Commission NTTF [Near Term Task Force] observed that, “some [nuclear] plants have an overreliance on operator actions and temporary flood mitigation measures such as using sandbags, temporary flood walls and barriers, and portable equipment to perform safety functions.” The NTTF report also states that, “the Task Force has concluded that flooding risks are of concern due to a „cliff-edge‟ effect, in that the safely consequences of a flooding event may increase sharply with a small increase in the flooding level. Therefore, it would be very beneficial to safety for all licensees to confirm that structures, systems, and components (SSCs) important to safely are adequately protected from floods.” 
The NRC describes Brunswick Nuclear Power Station’s interim solution to flooding: “the licensee planned to install metal “Cliff Edge Barriers” at targeted areas on site. These barriers are installed 1 to 3 days prior to…
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