Cooper Nuclear Station, an electric power plant in southeast Nebraska, declared a "Notification of Unusual Event" this morning at 4:02 a. m. The declaration was anticipated throughout Saturday by the power plant's operators, who closely tracked the river's steady increase in elevation due to the U.S. Army Corps of Engineers' releases from dams upstream.The notification was made as part of safety and emergency preparedness plan the station follows when flooding conditions are in effect. The plan's procedures dictate when the Missouri River's water level reaches 42.5 feet, or greater than 899 feet above sea level, a notification of unusual event is declared.
There is no threat to plant employees or to the public; the plant continues to operate safely. Appropriate local, county, state, and federal agencies were also notified.
Cooper staff continuously monitors the river's water levels as part of normal operations. However, on May 30, site personnel began additional preparations in anticipation of the Corps' release of higher volumes of water. Personnel have been proactive in preparing the station for flood conditions by filling sandbags, constructing barricades, procuring materials and supplies, and reinforcing the access road plant staff use to get to the station. More that 5,000 tons of sand was brought in for constructing barricades, such as Hesco barriers placed around the station's switchyard of transformers and other electrical equipment.
Should the river's level increase to 900 feet above sea level, plant personnel will also barricade internal doorways as another layer of protection for facility equipment. If the river's level increases to 45.5 feet or 902 feet above sea level, plant operators would take the station offline as a protective safety measure. The plant was built at 903' MSL, which is 13 feet above natural grade.
A Notification of Unusual Event is the lowest and least serious of four emergency classifications established by the Nuclear Regulatory Commission for nuclear power plants. If placed on a scale of 1 to 4, with 1 being the least serious level of an emergency and 4 being the most serious level of an emergency, a "Notification of Unusual Event" would equal a 1.
Cooper Nuclear Station is located three miles southeast of Brownville, Nebraska, near the Missouri River. It is owned and operated by the Nebraska Public Power District, with headquarters in Columbus, Nebraska
http://www.ncnewspress.com/topstories/x1774073316/Cooper-Nuclear-Station-declares-Notification-of-Unusual-Event
OMAHA, Neb. -- Nebraska Gov. Dave Heineman toured the flooded Missouri River this week and saw the Fort Calhoun Nuclear Plant, seemingly inundated by water.
The same image that the governor saw reached the Internet and had led to a wave of rumors. But Omaha Public Power District officials said the images don't tell the whole story.
They said the flood water pumped into a giant donut around the Fort Calhoun Nuclear Power Plant was put there to keep flood water out. Officials called it an "aqua berm."
The OPPD showed videos taken almost two weeks ago to demonstrate the efforts to keep the facility dry.
"I want (people) to understand the plant is safe (and) will continue to be safe," said Dave Bannister, an OPPD nuclear plant officer.
Officials said on Friday that the plant is on the lowest emergency status, but they are prepared if it rises another 10 feet.
"We have a lot of margin of where we are today. And, if things were to progress, we still have margins and actions to be able to address that," Bannister said.
Officials said they also want to dispel the rumors going around the Internet about a possible nuclear meltdown.
OPPD Chief Executive Officer Gary Gates said, "It's frustrating because some of the information is not right."
In April, OPPD asked for a no fly zone over the plant because they shut down the reactor for routine refueling.
"It has nothing to do with radiation. There is no release of radiation from the site," Bannister said.
Officials said the situation is totally different than the nuclear power plant in Japan that was hit by both earthquake and tsunami. They said they are confident with weeks they've had to prepare.
"I can assure you a Fukushima event will not occur at Fort Calhoun," Gates said.
OPPD said they will not restart the reactor until the river stabilizes.
http://www.ketv.com/r/28281114/detail.html