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Herr Rossi hat geschrieben:Ich has zrugggschickt, prophylaktisch

zwirrlibatz hat geschrieben:

geosnow hat geschrieben:die ganze ufruumarbeite sind für d füchs. in prypjat händs erscht nach jahre igxeh, dass die ganz süberigsarbet ide städtnüt bringt.

mir ischs eh nie ganz so klar gsi, wrum und wie me radioaktiv versüchti gägende mit schüüfeli und bürschteli chan suubermache.

Sie, da strahlts! - Ah easy, da tüe mer halt paar Erdschichte abträge.

BrainBug hat geschrieben:bloß was machste dann damit? verdichte oder verdünne?

In the intervening, post-Fukushima period, however, the country has been forced to boost its use of fossil fuels.

Die japanischen Behörden haben vor erhöhter Aktivität des Vulkans Sakurajima gewarnt. Anwohner machen sich nun für eine allfällige Evakuierung bereit. Der Vulkan befindet sich rund 50 Kilometer vom Atomkraftwerk Sendai entfernt.

Vulkan Sakurajima Bild in Lightbox öffnen.
Bildlegende: Beim Vulkan Sakurajima handelt es sich um einen der aktivsten Vulkane von Japan. REUTERS
In Japan haben die Behörden vor einer erhöhten Aktivität des Vulkans Sakurajima gewarnt, der rund 50 Kilometer von dem erst diese Woche wieder hochgefahrenen Atomkraftwerk Sendai entfernt ist.

Die Warnung gilt für zwei Städte, die sich rund 3 Kilometer vom Krater entfernt befinden. Es bestehe die Gefahr, dass am Fuss des Berges Steine herabregnen könnten. Die Bevölkerung in der Nähe des Sakurajima solle sich auf Evakuierungen vorbereiten, teilte Japans meteorologische Behörde mit. Betroffen seien rund hundert Menschen.

Der Sakurajima auf der im Süden Japans gelegenen Insel Kyushu ist einer der aktivsten Vulkane des Landes. Fast ununterbrochen kommt es zu Eruptionen. Doch nun könne es bald einen grösseren Ausbruch geben, sagte ein Vertreter der Meteorologischen Behörde.

Nach Tsunami abgeschaltet
Erst am Dienstag hatte der Betreiber Kyushu Electric Power einen Reaktor des AKW Sendai wieder hochgefahren. Es ist der erste seit der Katastrophe von Fukushima vor viereinhalb Jahren.

Die Atomaufsichtsbehörde schätzt die Chance, dass es während der Betriebsdauer des AKW Sendai zu einer grösseren Vulkan-Aktivität kommt, als vernachlässigbar ein. Erst vor zwei Jahren hatte der Sakurajima Asche rund fünf Kilometer hoch in die Luft gespien.

Armed police are evacuating everyone within three kilometres (1.9 miles) of the Tianjin blast site in China after fires reignited and seven to eight explosions rocked the area on Saturday, local media reported.

Hundreds of evacuees housed at a temporary shelter for the homeless in a nearby primary school were also being moved away, amid fears that highly toxic chemical sodium cyanide discovered at the site could lead to more casualties.

“Out of consideration for toxic substances spreading, the masses nearby have been asked to evacuate,” Xinhua said.

The chaotic scenes followed a rare glimmer of hope on Friday when Chinese rescue teams located the 19-year-old firefighter Zhou Ti at the site of the blast more than 30 hours after it occurred. Reports emerged on Saturday that he was only 20 metres away from the epicentre of the explosion when he was found alive.

ROBERT SIEGEL, HOST:

What caused Wednesday night's massive explosions in Tianjin, China, explosions that killed more than 50 people and injured hundreds more? What's known is that the explosions originated from a warehouse owned by a Chinese company that stored and handled dangerous chemicals. Chinese authorities have not given a detailed list of what those chemicals were, though. David Leggett is a consultant on hazardous chemical risk assessments, and he joins us now to talk about the chemicals that have been confirmed and chemicals that might have been at the site. Welcome to the program.

DAVID LEGGETT: Thank you.

SIEGEL: From what the company's website has acknowledged and what has been reported elsewhere, can you imagine what chemicals might've been at this warehouse that might've combined in such a way to produce such a massive explosion?

LEGGETT: As far as we can see right now, there are three chemicals that are confirmed - calcium carbide, potassium nitrate and sodium nitrate. And those three together, if left alone and not in the presence of fire, are relatively stable. However, in the presence of a fire - a very big fire, as we believe there was - the first thing that probably happens is that the containers of the calcium carbide start to fail. At the same time, one can expect to see that the water supplies in the warehouse may be beginning to fail. And if we get calcium carbide, especially if it's hot, mixed with water, we form a very, very flammable and highly explosive gas called acetylene.

SIEGEL: This is a transit warehouse, I gather, which means that at any given time, there could be different chemicals present in it depending on what the company is transporting where. Does that mean that local firefighters should be informed daily what's inside the warehouse, or is that practical?

LEGGETT: Yes and no. Let's take the example of America. America, where you have these sorts of transit warehouses, material safety data sheets accompany chemicals, and a good, well-run company will have a list of these material data safety sheets for every single chemical that will be in the facility, even if it's only there for 12 hours, with the result that when the firefighters have to show up to do a firefighting activity, they will have the ability to refer to the material safety data sheets which can help them understand the best way to fight a fire. Translate that into China, and the piece, I think, is missing is, what is the level of documentation that would go with the chemicals that are passing through this transit facility?

SIEGEL: You would question whether the documentation is thorough and accurate.

LEGGETT: Frankly, without knowing, and seeing the past history of China and their chemical explosions, yes, I would question that.

SIEGEL: A local safety administration official in Tianjin said that the chemical sodium cyanide was detected in the sewer system near the warehouse. If that's present, does that say anything to you about what might've caused or exacerbated the explosion?

LEGGETT: In an explosion, there is always the result of lots of debris being thrown around all over place. So finding it in the sewer, in my mind, is not a surprise.

SIEGEL: I mean, China is - has been noted for some terrible industrial accidents. When Americans see these pictures of a massive explosion at a port warehouse facility, should we be seriously concerned that this could happen at our local port and we could witness such a thing, or do we have a significantly better system than they do?

LEGGETT: I really believe we have a significantly better system, which does not mean that it can't happen. Handled properly and handled appropriately, it's a very safe system. If you don't get the handling right, then you are asking for trouble.

SIEGEL: Given the possibilities of what was in the warehouse - what chemicals were in the warehouse - would you assume that there are dangers going forward for the local air and water as a result of this?

LEGGETT: Depending upon the amount of sodium cyanide that is there, I would be concerned about the residues of sodium cyanide that may have been distributed across the area and how that cleanup will be managed. The other chemicals - calcium carbide is probably going to have been consumed either by the fire or by firefighting activities.

SIEGEL: Dr. Leggett, thank you very much for talking with us.

LEGGETT: You're very welcome. Thank you.

SIEGEL: David Leggett is as a consultant on hazardous chemical risk assessments, and he spoke to us from NPR West.