Board zum Unfall von Fukushima vom physikBlog

Das Containment wurde geflutet...

http://enenews.com/containment-building-flooded-nebraska-nuke-plant-order-cool-fuel-rods

Gibt es eine INES-Einstufung?

Level 4 s.o.^^

Auch an anderer Stelle gefunden:
http://hawaiinewsdaily.com/2011/06/nebraska-nuclear-plant-at-level-4-disaster/

Moment, ist das überhaupt INES? Das wäre dann ja wohl schon in aller Munde...

Merkwuerdig, gibt es denn gar keine weiteren Infos?

@ Kürsche

Laut englischsprachiger Wikipedia wurde dort am 6. Juni INES-1 und am 7. Juni INES-2 gemeldet. Laut gestern oder heute laut hawaiinewsdaily.com (siehe oben) Level 4, womit INES gemeint ist. Deshalb auch das Flugverbot im Radius von zwei Seemeilen um die Anlage:

http://ncrenegade.com/editorial/no-fly-zone-over-fort-calhoun-nuclear-plant-due-to-hazards/

Offizielle Informationen kriege ich nicht...komme leider nur bis zur Seite
http://www.nrc.gov/reading-rm/doc-collections/event-status/prelim-notice/2011/
Der Link zum eigentlichen Bericht
http://pbadupws.nrc.gov/docs/ML1115/ML111590877.pdf
liefert bei mir eine leere Seite, warum auch immer.

http://www.file-upload.net/download-3510886/ML111590877.pdf.html

Würde n Plugin empfehlen welches PDFs automatisch auf den PC lädt, statt es im Browser zu öffnen.

Also ich kann den Bericht öffnen
http://pbadupws.nrc.gov/docs/ML1115/ML111590877.pdf
und da ist eigentlich nur von einem zeitweiligen Feuer in elektrischen Einrichtungen die Rede und das die Kühlung des Fuel Pools anschließend sichergestellt werden konnte. Ansonsten steht die Anlage in einem Überschwemmungsgebiet und ist mittlerweile ringsum von Wasser umgeben. Das liest sich in der Pressemitteilung eigentlich so als wenn da etwas völlig falsch verstanden wurde.

@eng
Es soll ja seit gestern/heute schlimmer sein.
Ob das wirklich zutrifft, lässt sich bei den fehlenden Informationen kaum sagen.

Aber wenn das wirklich zutreffen würde müsste es doch entsprechende Meldungen geben.

OMAHA, NE (KIOS) - Rising Missouri River flood water has forced OPPD to declare a Notification of Unusual Event at its Fort Calhoun Nuclear Plant.
OPPD made the announcement in a news release this afternoon. Such notifications are made when events are happening or have happened that will impact the plant. In the news release, OPPD says the river is expected to rise to 1,004 feet above sea level this week and remain there for at least a month.

http://www.publicbroadcasting.net/kios/news.newsmain/article/0/0/1812305/Omaha.Public.Radio.News/OPPD.issues.Notification.of.Unusual.Event.for.Ft..Calhoun.nuclear.plant

"Flood Rumour Control" des Betreibers OPPD:
http://www.oppd.com/AboutUs/22_007105

Source: http://www.beyondnuclear.org/home/2011/6/15/it-doesnt-take-a-tsunami.html


> Ft Calhoun Spent Fuel In Ground - Pools, Flooded Already?
http://rense.com/general94/ftcal.htm


Hinter findet man von jump-ball bei June 14, 2011 at 9:17 pm eine grobe Zusammenfassung:
http://enenews.com/nebraska-nuke-plant-totally-surrounded-floodwaters-omaha-levees-hold-dykes-designed-weeks-water-3-4-months-expected


Hier noch angeblich was von der NRC zur Flood Protection der Anlage:
http://conservativenc.com/index.php/national/4067

Sehr guter Artikel:

> NRC: No flood danger at reactor
http://www.omaha.com/article/20110617/NEWS01/706179913/0

Ft Calhoun meldet der NRC:
> ADDITIONAL PENETRATION IDENTIFIED FOR MITIGATION DURING WALKDOWN
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/en.html#en46965

Dieses Problem war der NRC aber schon letztes Jahr aufgefallen:
http://enenews.com/breaking-may-16-report-predicted-yesterdays-event-at-calhoun-nuke-plant-intake-structure-flooding-could-affect-abilty-to-cool-reactor



Cooper Nuclear Station:
>Second Nebraska Nuclear Plant Threatened By Flooding
http://www.businessinsider.com/second-nebraska-nuclear-plant-threatened-by-flooding-but-everything-should-be-fine-2011-6

1993 hatte dieses KKW schon einmal Probleme mit Hochwasser:
http://www.nirs.org/factsheets/naturaldisaster&nuclearpower.pdf

Irgendwie ist es verdächtig ruhig geworden um Nebraska für ein Lvl4-Ereignis.

Und vor kurzer Zeit gab es hier noch einen Messpunkt in Nebraska, jetzt ist er weg...
http://www.radiationnetwork.com/

Eben weil's kein Level 4 Ereignis ist. Level 4 bezog sich afaik nur auf das Hochwasser, hab jetzt aber keine Quelle zur Hand. Bei Level 4 wäre es schon zu Schäden am Reaktor gekommen.

Das Flugverbot würde übrigens verhängt, damit keine Flugzeuge und Hubschrauber der Presse darüber fliegen um Bilder von der Überschwemmung zu machen und dabei dann zusammenkrachen.

Dann hoffen wir mal, dass das stimmt und die japanische heute-hü-und-morgen-hott-Taktik inklusive der Salamimethode keine Nachahmer in den USA findet...

Ganz überstanden ist die Sache hier auch noch nicht.

Der Wasserstand soll über einige Wochen so hoch bleiben, und teilweise sogar noch etwas höher werden, wenn ich es richtig verstanden habe.
Wenn die Barrieren das Wasser nicht mehr zurück halten könnte, mag das hier nochmal unangenehm werden.

Wie jedoch in den Artikeln oben beschrieben, hatte man hier Wochen im Voraus Zeit sich auf die zu erwartenden Umstände vorzubereiten - was man auch getan hat.

Wie erwartet hat jetzt auch das zweite KKW einen Notfall der geringsten Stufe erklärt:
>Cooper Nuclear Station declares “Notification of Unusual Event”
http://www.nppd.com/Newsroom/NewsRelease.asp?NewsReleaseID=503


Hier sind übrigens die vier Notfallstufen bei Nuklearzwischenfällen in den USA:
http://en.wikipedia.org/wiki/Nuclear_safety_in_the_United_States#Emergency_Classifications

Cooper Nuclear Station, Überflutung der "fire training facility":
>RELEASE OF OIL TO THE MISSOURI RIVER
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/en.html#en46970

Von unseren "Freunden" der iranischen Staatsmedien:

> Floods threaten central US nuclear plant
http://www.presstv.ir/detail/185477.html

As the Missouri River continues to swell, the US state of Nebraska has issued an emergency flood warning at the Cooper Nuclear Power Station.


The Nebraska Public Power District has issued a flood alert for the state's southeast Cooper nuclear plant, the Associated Press reported.

"We knew the river was going to rise for some time," said Columbus-based utility spokesman Mark Becker, adding that it was just a matter of time.

The water level at the Cooper plant station currently stands at 13.6 meters. If water levels reach 13.9 meters, the station may be shut down.

Flash flood warnings have also been issued for several counties in the state of Missouri.

Nebraska's Fort Calhoun nuclear plant has been shut down, as water is currently being held back by a series of barriers, including an 8-foot rubber wall.

The Cooper and Fort Calhoun nuclear plants are the only plants along the Missouri River.

Heavy rainfall and melting snow on the Rocky Mountains are expected to keep the river's water level high until August.

Ma abwarten (ob et)was passiert.

http://www.blacklistednews.com/?news_id=14369&utm_source=twitterfeed&utm_medium=twitter

Inches away from being America's Fukushima: Nuclear plant dangerously close to being engulfed by Missouri floods
June 21, 2011

Source: Daily Mail

Nuclear plant inches from being totally flooded, but is saved - for now
Damage would be likely to cause energy prices to soar
Six to 12 inches of heavy rainfall over the last few weeks
Record floods hit 44.4 feet, topping 44.3 feet record set in 1993
Levees fail to stem surge of water and sand is running out
Flooding expected to continue until August
Residents begin burning wood to avoid it becoming flood debris
Meanwhile, engineers close the Bonnet Carre Spillway near New Orleans

A nuclear plant was inches away from being engulfed by the bloated Missouri River after several levees in the area failed to hold back its surging waters, raising fears it could become America's Fukushima.

Dramatic pictures show the moment the plant was threatened with being shut down today, as water levels rose ominously to within 18 inches of its walls.


The river has to hit 902 feet above sea level at Brownville before officials will shut down the Cooper Nuclear Plant, which sits at 903 feet. It stopped and ebbed slightly yesterday, a reprieve caused by levee breaches in northwest Missouri - for now.

Die lassen die Anlage(n) bis zum letzten Moment laufen? Hart.

Hier sind die Missouri-Wasserstände für den jeweils nächstgelegenen Meßpunkt:

Blair für Fort Calhoun:
http://www.nwd-mr.usace.army.mil/rcc/plots/jpegs/blne.jpg
http://water.weather.gov/ahps2/hydrograph.php?wfo=oax&gage=blan1

Brownville für Cooper Plant:
http://www.nwd-mr.usace.army.mil/rcc/plots/jpegs/bvne.jpg
http://water.weather.gov/ahps2/hydrograph.php?wfo=oax&gage=bron1

bei 45,5 Fuß Wasserstand (902 feet above sea level) schaltet Cooper ab...



Etwas mehr Informationen über Fort Calhoun:
http://www.nirs.org/reactorwatch/accidents/fortcalhoun.htm



Zu der Flut kommen jetzt auch noch Tornados. Der Betreiber von Cooper hat einige Stromleitungen (Aurora: ca. 200 km entfernt) verloren:

>Storms cause customer outages, extensive damage to NPPD transmission lines
http://www.nppd.com/Newsroom/NewsRelease.asp?NewsReleaseID=504

Hoffentlich bleiben die Kraftwerke verschont.

Hier gibt's ein paar Bilder:
http://www.cartoradiations.fr/Fort_Calhoun.php

@Tim: Danke für die Bilder. Der Aqua Dam ist ja ein tolles Teil.

Wasser gegen Wasser :)
Aber wenn es jetzt drüberschwappt... ?

Dann ist es eine Überschwemmung. ;)

So, am Montag will sich jetzt wohl der Chef von der NRC persönlich ein Bild von der Lage vor Ort machen:

http://missouri-news.org/midwest-news/nebraska/exclusive-with-nuke-plants-threatened-nrc-chief-is-heading-to-nebraska/6283

http://www.kvnonews.com/2011/06/top-nuke-official-likely-to-visit-nebraska-monday/

June 23rd, 2011

Omaha, NE – KVNO News has confirmed that the head of the Nuclear Regulatory Commission, Gregory Jaczko, will likely be stopping in Nebraska on Monday. Senator Mike Johanns’ office confirms the NRC has told his office to expect the Chairman Monday, although the NRC will not confirm the visit. Typically, these announcements are not confirmed until all scheduling is finalized.

Ganz so harmlos scheint die Situation dort dann wohl doch nicht zu sein...

> Floodwater Flowing into Sewage Lagoon at Fort Calhoun Station
http://www.oppd.com/AboutUs/NewsEvents/22_000812#flow_062311

Ich hatte mich schon gefragt, was hier los ist, ein Rückgang des Wasserpegels war nicht erwartet worden:
http://water.weather.gov/ahps2/hydrograph.php?wfo=oax&gage=bron1


und tatsächlich, ein Dammbruch oberhalb von Brownville:
>Levee Fails Upstream From Cooper Nuclear Station
http://nebraska.statepaper.com/vnews/display.v/ART/2011/06/24/4e0444e29756b

>Levee fails, but Brownville OK
http://www.omaha.com/article/20110624/NEWS01/706249885

Das Kernkraftwerk soll aber ok sein.

NRC-Chef doch schon am Sonntag im Cooper Kernkraftwerk:

>NRC chairman to tour both Neb. nuclear plants
http://www.kttc.com/story/14972486/nrc-chairman-to-tour-both-neb-nuclear-plants

The commission says Gregory Jaczko will visit Cooper nuclear power plant near Brownville on Sunday, and then tour Fort Calhoun nuclear power plant near Blair on Monday. He will also take a helicopter tour of flooding on the river.

http://www.dailymail.co.uk/news/article-2007885/Flood-waters-subside-Nebraska-nuclear-plant--set-rise-dangerously-high-coming-days.html?ito=feeds-newsxml


Fort Calhoun


Cooper Nuclear Station

>NRC spokesman: No need for Nebraska spent nuclear fuel casks to be protected
http://iowaindependent.com/57751/nrc-spokesman-no-need-for-nebraska-spent-nuclear-fuel-casks-to-be-protected

A Nuclear Regulatory Commission spokesman told The Iowa Independent Friday that dry cask storage of spent nuclear fuel rods at two Nebraska facilities are not being protected from flood waters because the situation poses no public or environmental threat.

“They are not within the flood protection barrier,” Dricks said. “There’s no reason for them to be. Those are large, sealed canisters that are bolted down — no risk with the floodwaters.”

Spent fuel rods are first cooled in a spent fuel pool for a year before being placed in dry cask storage. The fuel is surrounded by inert gas inside a large container, typically steel cylinders that are either welded or bolted closed. That container is then surrounded by another protective layer — typically steel or concrete — as a further radiation shield. Additional technical information on the process of dry storage can be found in a December 2010 report by the U.S. Nuclear Waste Technical Review Board (PDF).

Because of their protected state, Dricks said, there is no danger associated with these storage casks being exposed to the ongoing flood.

Gibt eine handvoll neue Bilder auf der Seite von weiter oben:
http://www.cartoradiations.fr/Fort_Calhoun.php

Man könnte sagen: das wasser steht bis zum Hals

Die Bilder von cartoradiations sind wirklich gut, der Rest ist aber leider nicht wirklich eine sachliche Information.

Auxiliary building at Ft. Calhoun surrounded by water after berm failure — NRC letter said if water enters auxilary building, could have station blackout with core damage in hours

http://enenews.com/auxiliary-building-ft-calhoun-surrounded-water-nrc-letter-water-enters-auxilary-building-could-station-blackout-core-damage-hours


Ft. Calhoun nuke plant now running on emergency generators as workers try to restore electricity — Power supply cut after water surrounded main electrical transformers

http://enenews.com/ft-calhoun-nuke-plant-now-running-on-emergency-generators-as-workers-try-to-restore-electricity-power-supply-cut-after-water-surrounded-main-electrical-transformers

Die wahrscheinlich unnötigste Seite zum Thema:
http://www.physicsforums.com/showthread.php?t=508209

http://www.oppd.com/AboutUs/NewsEvents/22_000812#news_062611

Ft. Calhoun Betreiber OPPD:

At approximately 1:25 a.m. Sunday, June 26, the aqua berm providing enhanced flood protection for Fort Calhoun Station was deflated due to onsite activities. The plant is secure. At no time were the fuel cooling systems lost.

The plant, basically, is in the same situation it would have been in had the extra layer of protection of the aqua berm not been added. It is designed to withstand waters up to 1014 feet above mean sea level (MSL). The river level currently is at 1006.3 feet MSL and stable. River levels are not expected to exceed 1008 feet MSL.

Flood gates and additional sandbagging around the plant were in place many days ago.

As a precaution, per plant procedure, the operators started the diesel generators and temporarily disconnected from off-site power. Plant operators later reconnected to off-site power once all safety checks had been completed. U.S. Nuclear Regulatory Commission personnel stationed onsite for flood monitoring have been informed.



>Nebraska residents shrug off flood risk to nuclear plant
http://www.chicagotribune.com/news/nationworld/sns-rt-us-flooding-nucleartre75p1vj-20110626,0,4443757.story

Local shop owner Katy Morgan, 28, said her fears have been assuaged by information she has received via plant officials, who give out emergency radio equipment to residents within a 10-mile radius of the Cooper plant.

Das Cooper-KKW verteilt Notfall-Radio-Equipment an Anwohner?
Interessant.

@ stephan_k

Danke für den Link. Auf was beziehst du dich mit deinem Kommentar?

> Flood berm collapses at Nebraska nuclear plant
http://www.google.com/hostednews/ap/article/ALeqM5hwsIdVXW-V7xE60P0dUnI_qSIaIw?docId=252989d1dda94c1d83ee47ba8907e484

A berm holding the flooded Missouri River back from a Nebraska nuclear power station collapsed early Sunday, but federal regulators said they were monitoring the situation and there was no danger.

The Fort Calhoun Nuclear Station shut down in early April for refueling, and there is no water inside the plant, the U.S. Nuclear Regulatory Commission said. Also, the river is not expected to rise higher than the level the plant was designed to handle. NRC spokesman Victor Dricks said the plant remains safe.

...

The berm's collapse didn't affect the reactor shutdown cooling or the spent fuel pool cooling, but the power supply was cut after water surrounded the main electrical transformers, the NRC said. Emergency generators powered the plant until an off-site power supply was connected Sunday afternoon, according to OPPD.

...

Flooding remains a concern all along the Missouri because of massive amounts of water the U.S. Army Corps of Engineers has released from upstream reservoirs. The river is expected to rise as much as 5 to 7 feet above flood stage in much of Nebraska and Iowa and as much as 10 feet over flood stage in parts of Missouri.

The corps expects the river to remain high at least into August because of heavy spring rains in the upper Plains and substantial Rocky Mountain snowpack melting into the river basin.

Hoffen wir es bleibt "safe".

@Tim
Auf die Posts auf den ersten beiden Seiten des Blogs, die ziemlich opportunistisch und teilweise zensiert waren. Anscheinend entwickelt sich ja doch noch eine lebendige Diskussion in diesem Forum, also ziehe ich meinen Kommentar zurück!

Tja "der Freund eines Arbeiters des Kraftwerks" .. was will man da groß erwarten.

An einem trockeneren Ort, gar nicht so weit entfernt:

[NY Daily News] New Mexico wildfires force evacuation at Los Alamos nuclear labratory

Raging wildfires in New Mexico forced the evacuation of the famed nuclear lab at Los Alamos Monday, though officials insist that radioactive material is secure.

Fires have burned as close as one mile from the government lab - threatening buildings, power lines and gas lines, officials said.

"Lab emergency crews have been dispatched across the lab to protect key facilities and materials," said lab spokesman Jeff Berger.

"Protected areas include all hazardous and radioactive facilities and our proton accelerator and super-computing centers."

>FORT CALHOUN
>OFFSITE NOTIFICATION DUE TO PETROLEUM RELEASE TO THE MISSOURI RIVER
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/en.html#en46989

At approximately 0125 CDT, the AquaDam providing enhanced flood protection for Fort Calhoun Station Unit 1 failed.
This resulted in approximately 100 gallons of petroleum being released into the river after a protective barrier was breached and many fuel containers were washed out to the river. The fuel/oil containers were staged around the facility to supply fuel for pumps which remove water within the flood containment barriers.

Ft. Calhoun - jetzt haben sie kleinere Leckagen im Turbinengebäude:

>Floodwater seeps into Nebraska nuke plant building
http://www.gazette.com/articles/omaha-120463-plant-building.html

OMAHA — Missouri River floodwater seeped into the turbine building at a nuclear power plant near Omaha on Monday, but plant officials said the seepage was expected and posed no safety risk because the building contains no nuclear material.
<...>
Omaha Public Power District spokesman Jeff Hanson said pumps were handling the problem at the Fort Calhoun Nuclear Station and that "everything is secure and safe."

>A Nuclear Situation in Nebraska?
http://motherjones.com/blue-marble/2011/06/nuclear-situation-nebraska