Aktuelle Themen Atomkraftwerk in Nebraska - alles unter Kontrolle?

Declaration at Cooper Nuclear Station
As the Missouri River rises, the Nebraska Public Power District has declared a "Notification of Unusual Event" for the Cooper Nuclear Station. The notification was made at 4:02am Sunday. It is part of the safety and emergency preparedness plan that the station follows when certain flooding conditions are present.
Posted: 5:23 AM Jun 19, 2011
Reporter: WOWT-TV
Email Address: [email protected]

WOWT
Record River Surge Recorded In Southeast Nebraska
River overflowing levees In northwest Missouri
The Missouri River surged to a new record at Brownville in southeast Nebraska Sunday afternoon as workers have been adding sandbags to the levee.
Posted: 11:44 AM Jun 19, 2011 | Updated: 12:14 AM Jun 20, 2011
Reporter: Jeff Sabin, The Associated Press
Email Address: [email protected]

The National Weather Service said the river measured at 44.75 feet surpassing a record of 44.3 feet set in 1993. Flood stage is 33 feet.

The U.S. Army Corps of Engineers said the river level at Brownville surged two feet from Saturday morning to Sunday morning. Col. Bob Ruch attributed that to heavy rain on the Nishnabotna River, which flows into the Missouri, and to some erosion along a levee upstream at Hamburg, Iowa, that created a water pulse.

The Nebraska Emergency Management Agency says water was flowing over a levee there and into farmland, but the levee is being built up.

Nemaha County emergency manager Renee Critser said when workers built up one section of the levee to alleviate the overtopping, water would flow over in another spot.

Downstream in northwest Missouri, several levees were failing to hold back the surge of water being released from upstream dams. A hole in the side of a Holt County levee continued to grow Sunday, deluging the recreational area of Big Lake.

Authorities said water began pouring over levees Saturday night in Holt and Atchison counties, flooding farmland and numerous homes and cabins. Residents with swamps for back yards said worrying is worthless. “It's just kind of part of living near the Missouri River," said one.

Homeowners and farmers are beginning to count their losses. “The best crop we've ever seen and the best prices and we're gonna get a zero paycheck this year."

Presiding Holt County commissioner Mark Sitherwood said water is seeping underneath levees in numerous spots, too. U.S. 159 is closed south of Big Lake because water is flowing over the road.

Sitherwood said most people evacuated in advance of the flooding. The Big Lake area has experienced flooding in three of the last five years, but Sitherwood said this year promises to be much worse.

The overtopping follows weeks of high flows and increasing releases from the main stem dams in Montana and the Dakotas.

The U.S. Army Corps of Engineers said the release of water from Gavins Point Dam in Yankton is now up to 150,000-cubic-feet-per-second, the maximum anticipated.

Highway 2 in Fremont County, Iowa is now closed between I-29 and Nebraska City. It’s expected to be a long-term closure. An alternate route is posted on the department's Web site. The exit and entrance ramps at Thurman, Iowa are also closed.

Interstate 29 continues to be closed from Nebraska City to Rock Port, Missouri and from north of Council Bluffs to the Loveland exit. The I-29/I-680 interchange was reopened Friday.


WOWT
Cooper Nuclear Station On Lowest Warning Level
Flooding precaution at southeast Nebraska plant along river
As the Missouri River rises, the Nebraska Public Power District declared a Notification of Unusual Event Sunday for the Cooper Nuclear Station located three miles southeast of Brownville, Nebraska along the riverfront.
Posted: 3:21 PM Jun 19, 2011 | Updated: 11:03 AM Jun 20, 2011
Reporter: WOWT
Email Address: [email protected]

It is part of the safety and emergency preparedness plan that the station follows when certain flooding conditions are present.

NPPD says there is no threat to plant employees or the general public. The plant continues to operate safely. The Omaha Public Power District made the same declaration nearly two weeks ago when the Missouri River continued to rise near the Fort Calhoun Nuclear Station.

The Missouri River surged to a new record at Brownville Sunday afternoon. The National Weather Service said the river measured at 44.75 feet surpassing a record of 44.3 feet set in 1993. Flood stage is 33 feet. The U.S. Army Corps of Engineers said the river level at Brownville surged two feet from Saturday morning to Sunday morning.

NPPD plans dictate that when the Missouri River’s water level reaches 42.5 feet or greater than 899 feet above sea level, the notification of an unusual event is declared. If the river’s level increases to 900 feet above sea level, plant personnel will barricade internal doorways as another layer of protection for facility equipment. At 902 feet, the plant would be taken offline as a protective safety measure.

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.

CNN.com
June 27, 2011
Updated 0236 GMT (1036 HKT)
Flood berm bursts at Nebraska nuclear plant
By the CNN Wire Staff

(CNN) -- A water-filled berm protecting a nuclear power plant in Nebraska from rising floodwaters collapsed Sunday, according to a spokesman, who said the plant remains secure.

Some sort of machinery came in contact with the berm, puncturing it and causing the berm to deflate, said Mike Jones, a spokesman for the Omaha Public Power District (OPPD), which owns the Fort Calhoun plant.

[...]