Mirada schumpeteriana de la crisis
http://www.project-syndicate.org/commentary/technological-stagnation-and-advanced-countries--slow-growth-by-kenneth-rogoff/spanish
17. TASAS DE INTERES Peru
16. tipo de cambio sol/dolar-consulta del dia
V. SECCION: M. PRIMAS
1. SECCION:materias primas en linea:precios
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METALES A 30 DIAS click sobre la imagen
(click sur l´image)
2. PRECIOS MATERIAS PRIMAS
9. prix du petrole
10. PRIX essence
petrole on line
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Mostrando entradas con la etiqueta JAPON. Mostrar todas las entradas
Mostrando entradas con la etiqueta JAPON. Mostrar todas las entradas
4 dic 2012
CRISIS,CIENCIA,TECNOLOGIA,INNOVACION
Etiquetas: 2012, ciencia, dic12, ECONOMIA, EURO, innova, JAPON, MACROECONOMICS, TECNOLOGIA, USA
28 ago 2012
Fwd: LEAP/E2020 Press Review on the Global Systemic Crisis
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sobre crisis financiera global
http://www.betaggarcian.blogspot.com/
24 ago 2011
Dile a los alemanes que los "austriacos " tenían razón
What is the secret to Germany's economic success, part 2?
Economy | Edward Harrison | 16 August 2011 09:00
Data out today show that German economic growth slowed sharply in the last quarter, with the economy growing at a weak 0.1% rate in the April-June quarter. Growth in the previous quarter was also revised down. to 1.3% from 1.5%.
Moreover while the euro zone-wide slowdown was not as severe, the data do show growth slowing from 0.8% in Q1 to 0.2% in the latest quarter. In essence, the euro zone economy is at stall speed and on the verge of recession.
Let me say a few words about Germany's economic success in light of the latest data.
First, whenever I write a post, I like to look into my archives and see what I have said about the topic in the past. That usually means I end up linking to and quoting those posts as a mental note for myself, but also as a quality check. It's easy to say one thing due to the exigent circumstances of the times and then flip-flop to saying something else three months later. my links serve as my way of avoiding this.
When I checked in the archives, here's what I found first:
The bottom line: the fundamentals of the German economy are relatively good and support continued long-term growth.I stole the title from that post because I want to expand on it here. Germany has a large internal domestic economy that insulates it from exogenous shocks much as America's large economy does. However, this effect only goes so far. So, this time, rather than extol Germany for the virtues of its economic success I want to talk more at length about the growth problems there.
Nevertheless, I am sceptical of the pace of German recovery for two reasons. First, Germany is fully integrated with the rest of Europe where many economies are struggling with debt issues, weakening demand for German exports…
Second, domestic demand remains weak in Germany. …German retail sales increased 1.2% in 2010… That this weak 1.2% increase in 2010 is the highest reading since 2005 and cause for optimism tells you that domestic demand growth is a sticky wicket for the German economy. Demographic factors almost certainly come into play here… [Claus Vistesen's] post on an aging… points to an increasing burden from Germany's social programs for pensioners. And German national debt of over 77% of GDP reflects this burden.
These headwinds point to moderating growth. And if the European periphery spirals down, it will drag Germany down with it via trade and financial linkages. Germany needs to develop internal demand, especially if it is going to pay for its social programs…
Overall, we should credit Germany for building a recovery based not just on exports, but on capital investment and saving. One reason that Germany is a manufacturing and export powerhouse is because it has invested in those businesses… And that is definitely worthy of emulation.
-What is the secret to Germany's economic success?
Demographics
First, Notice that a decline in household spending was a major contributor to the fall in Germany's growth. Germany is aging. And that speaks to declining consumption demand and declining growth - just as it does in Italy and Japan, two other advanced economies mired in near zero growth with similar demographics. This is what is killing those highly indebted nations.
Look at the chart below and you can see the slowing growth.

Germany is trade-dependent
Moreover, there is also the trade connection. Germany's export machinery creates a lot of economic volatility. That's why German's lead export group is pushing for Eurobonds. As I put it when the sovereign debt crisis was first beginning, Spain's debt woes and Germany's intransigence lead to double dip.
If Spain is forced to run austerity measures as seems likely, in stage two, this shifts their government deficit markedly down. Given Spain's poor labour competitiveness, sticky wage prices and inability to depreciate the currency, all of the adjustment falls onto the private sector in the form of reduced net savings (which could include larger debt burdens). But, the thing to realize is that total GDP in Spain is lower in this scenario, which means total imports are lower, which means Germany's total export volume is lower. This is a deflationary scenario.And I use Spain here as a metaphor for the entire periphery. The euro zone is on the verge of a double dip, especially in view of the contractionary fiscal policies in the periphery. There is zero chance Germany can escape this unscathed.
Germany's banks are under-capitalised
Everyone knows the peripheral bailouts are about German and French banks. The European banks were undercapitalised before the crisis and are still undercapitalised today. The real problem for the Germans is the recklessness of their banking sector. We saw the bailouts of Commerzbank, IKB and WestLB, HSH Nordbanken, and so on. The Irish debacle is about bankers gone wild in Ireland AND Germany. I should also point out how reckless German banks like Hypo Real Estate have been implicated in misadventures in Spain. And just to reinforce how wild German banks went, we have to remember that even Deutsche Bank, the biggest and most well-respected German bank, was getting hand outs from the U.S Federal Reserve to prevent its insolvency during the liquidity crisis in 2008-2009. In terms of economic weakness, this may be less relevant. But in terms of potential sovereign defaults or a banking crisis it is very relevant.
Germany does have a high debt load
I think this graphic from Die Welt makes that clear. Germany's fiscal record is significantly worse than Spain's over the last decade before the credit crisis such that it still has a higher debt-to-GDP ratio even today.

My point: There are a lot of reasons Germany has been doing well: wage restraint, educated workforce, low unemployment, etc. I could go on and on. But in a global growth slowdown, the Germans will not be immune any more this go round than they were last time when their contracted more violently than most along with the other export-dependent aging society, Japan. Austerity in the west, debt overhangs in the periphery and monetary tightening in emerging markets will act to slow demand globally. And this will certainly impact Germany.
If Germany wants continued economic success, its government must do a much better job in leading the euro zone out of its existential crisis. If the periphery sinks, we all sink.
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16 ago 2011
Científicos rusos pronosticaron terremoto de Japón hace 14 años
Científicos rusos pronosticaron terremoto de Japón hace 14 años
Tema de actualidad: Fuertes terremotos sacuden Japón
15:40 16/03/2011
Vladivostok (Rusia), 16 de marzo, RIA Novosti.
Científicos de la ciudad rusa de Vladivostok pronosticaron en 1997 que habría un seísmo devastador en el noreste de Japón este año.
"Auguramos que en 2011 habría una serie de sacudidas de magnitud equivalente o superior a 10 grados en la zona de Kanto. Y es precisamente esta parte de Japón la que ha sufrido ahora los mayores estragos", manifestó a RIA Novosti Valeri Abrámov, jefe del laboratorio de Geología y Tectonofísica Regional en el Instituto del Pacífico anexo a la filial de la Academia de Ciencias de Rusia en el Lejano Oriente.
Para avalar sus palabras, Abrámov enseñó el ejemplar de una revista local, "Obras del club de profesores de la UNESCO", que publicó aquel pronóstico en 1997. El vaticinio se sustentaba en una inmensa base de datos acerca de la actividad sísmica en el Lejano Oriente y se remitía, entre otras cosas, al poderoso terremoto de 1923 en Japón. Tras analizar toda la información, los investigadores usaron fórmulas especiales para comprobar el carácter cíclico de tales seísmos.
El Consulado General de Japón en Vladivostok, según Abrámov, solicitó y recibió en mayo de 2006 el pronóstico y los materiales relacionados pero se ignora qué uso les dio finalmente. Por las mismas fechas se produjo en Japón un terremoto bastante fuerte que, a juicio del investigador ruso, presagiaba lo ocurrido el 11 de marzo de 2011.
Las autoridades de Japón, en su opinión, estaban avisadas del terremoto y podían haber evitado una parte de los daños. "Si hubieran disminuido desde principios de 2011 la presión energética sobre las centrales nucleares, habrían prevenido fugas de radiación desde los reactores. Todo parece indicar que científicos japoneses, basándose en estudios propios, descartaban la posibilidad de un temblor", señaló.
"Auguramos que en 2011 habría una serie de sacudidas de magnitud equivalente o superior a 10 grados en la zona de Kanto. Y es precisamente esta parte de Japón la que ha sufrido ahora los mayores estragos", manifestó a RIA Novosti Valeri Abrámov, jefe del laboratorio de Geología y Tectonofísica Regional en el Instituto del Pacífico anexo a la filial de la Academia de Ciencias de Rusia en el Lejano Oriente.
Para avalar sus palabras, Abrámov enseñó el ejemplar de una revista local, "Obras del club de profesores de la UNESCO", que publicó aquel pronóstico en 1997. El vaticinio se sustentaba en una inmensa base de datos acerca de la actividad sísmica en el Lejano Oriente y se remitía, entre otras cosas, al poderoso terremoto de 1923 en Japón. Tras analizar toda la información, los investigadores usaron fórmulas especiales para comprobar el carácter cíclico de tales seísmos.
El Consulado General de Japón en Vladivostok, según Abrámov, solicitó y recibió en mayo de 2006 el pronóstico y los materiales relacionados pero se ignora qué uso les dio finalmente. Por las mismas fechas se produjo en Japón un terremoto bastante fuerte que, a juicio del investigador ruso, presagiaba lo ocurrido el 11 de marzo de 2011.
Las autoridades de Japón, en su opinión, estaban avisadas del terremoto y podían haber evitado una parte de los daños. "Si hubieran disminuido desde principios de 2011 la presión energética sobre las centrales nucleares, habrían prevenido fugas de radiación desde los reactores. Todo parece indicar que científicos japoneses, basándose en estudios propios, descartaban la posibilidad de un temblor", señaló.
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Uranio y otras timbas
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15 ago 2011
Has The Tsunami In Japan Destroyed The Japanese Economy?
Has The Tsunami In Japan Destroyed The Japanese Economy?
The Economic Collapse ^ | 03/12/2011 | Michael Snyder
The Economic Collapse ^ | 03/12/2011 | Michael Snyder
Posted on sáb 12 mar 2011 15:07:47
The entire world is in a state of mourning today as details regarding the horrific damage caused by the massive tsunami in Japan continue to trickle in. The magnitude 8.9 earthquake that caused the tsunami was the largest earthquake that Japan has ever experienced in modern times. Waves as high as 30 feet swept over northern Japan. The tsunami waters reached as far as 6 miles inland, and authorities have already recovered hundreds of dead bodies. Those of us that have seen footage of this disaster on television will never forget it. But this nightmare is not over yet. There have been dozens of aftershocks, and many of them have been quite large. In fact, there have been 19 earthquakes of at least magnitude 6.0 in the area over the last 24 hours. So what is this disaster going to do to the 3rd largest economy in the world? Japan already had a national debt that was well over 200 percent of GDP. Could this be the "tipping point" that pushes the Japanese economy over the edge and into oblivion?
It is hard to assess the full scope of the damage to Japan at this point, but virtually everyone agrees that much of northern Japan is a complete and total disaster area at this point. Many towns have essentially been destroyed. Some are estimating that the economic damage from this disaster will be in the hundreds of billions of dollars. Others believe that the final total will be in the trillions of dollars.
Fortunately, major cities such as Tokyo came through this event relatively unscathed and most of the major manufacturing facilities are not in the areas that were most directly affected by the earthquake and the tsunami.
But let there be no doubt, this was a nation-changing event. Japan will never quite be the same again.
Also, it isn't just Japan that will be affected by this. The truth is that economic ripples from this event will be felt all over the world.
An economist from High Frequency Economics, Carl Weinberg, told AFP the following about the economic consequences of this disaster....
The Japanese are a very resilient people and the Bank of Japan is already vowing that it will be doing whatever is necessary to ensure the stability of the financial markets. The Bank of Japan has announced that it is going to provide as much liquidity as necessary to keep the Japanese economy functioning normally.
But the truth is that the Bank of Japan has already been printing money like crazy....

Is a tsunami of new yen really going to solve the economic damage that has been done by the earthquake and the tsunami?
Of course not.
The truth is that the economy of Japan was already deeply struggling before this disaster.
The national debt of Japan is now well over 200% of GDP and there seems to be no doubt that they will need to borrow massive amounts of money to deal with the aftermath of this crisis.
Up until now the Japanese government has been able to borrow money at ultra-low interest rates of around 1.30 percent for 10-year bonds, drawing on a huge pool of savings from its own citizens.
But in light of what has just happened, will the citizens of Japan still have enough resources to continue to fund the rampant spending of the Japanese government?
At this point, it is estimated that this gigantic mountain of debt breaks down to 7.5 million yen for every single citizen of Japan.
Politicians in Japan have been pledging for years to do something about all of this debt, but nobody has been able to make much progress.
Even before this disaster, the major credit rating agencies were warning that they may have to downgrade Japanese government debt. The earthquake and the tsunami are certainly not going to make the Japanese even more credit-worthy.
Hideo Kumano, the chief economist at Dai-ichi Life Research Institute, has said that a "tipping point" will come when world financial markets finally recognize that the government of Japan simply cannot afford to service its debt any longer....
Other countries such as Greece and Ireland would have already collapsed if it had not been for the massive international bailouts that they received.
So who is going to bail Japan out?
This could potentially be one of the greatest economic disasters that the world has seen since World War 2.
With the world already on the verge of a major financial collapse, this is the last thing that world financial markets needed.
In fact, much of the rest of the world had been hoping that an influx of capital from Japan would help to stabilize things.
For example, Japanese insurance companies had recently announced that they were planning on buying up lots of European sovereign debt, but now obviously those plans are on hold. As a result of this disaster, Japanese insurance companies will be forced to sell off assets like crazy in order to pay settlements. But as Zero Hedge is correctly pointing out, without Japanese financial institutions stepping in to soak up Eurozone bonds this is going to make the European sovereign debt crisis even worse.
But right now the focus in on the devastation in Japan. At the moment it is unclear how much of the economic infrastructure of Japan has survived.
For example, as USA Today is reporting, some factories cannot even be reached by phone at this point....
Julian Jessop of Capital Economics certainly does not sound optimistic about what this is going to mean for the Japanese economy....
But the truth is that this is a huge, huge event for a world economy that was already on the verge of collapse.
May our thoughts and our prayers be with the Japanese people at this time.
This is truly one of the biggest disasters that any of us have ever seen, and Japan will never be the same again.
It is hard to assess the full scope of the damage to Japan at this point, but virtually everyone agrees that much of northern Japan is a complete and total disaster area at this point. Many towns have essentially been destroyed. Some are estimating that the economic damage from this disaster will be in the hundreds of billions of dollars. Others believe that the final total will be in the trillions of dollars.
Fortunately, major cities such as Tokyo came through this event relatively unscathed and most of the major manufacturing facilities are not in the areas that were most directly affected by the earthquake and the tsunami.
But let there be no doubt, this was a nation-changing event. Japan will never quite be the same again.
Also, it isn't just Japan that will be affected by this. The truth is that economic ripples from this event will be felt all over the world.
An economist from High Frequency Economics, Carl Weinberg, told AFP the following about the economic consequences of this disaster....
"There is no way to assess even the direct damage to Japan's economy or to the global economy. This is a sad day for Japan, and economic aftershocks could affect the whole world's economy."It is literally going to take months to figure out exactly how much damage has been done. Let us just hope that we don't see any more major earthquakes in the area.
The Japanese are a very resilient people and the Bank of Japan is already vowing that it will be doing whatever is necessary to ensure the stability of the financial markets. The Bank of Japan has announced that it is going to provide as much liquidity as necessary to keep the Japanese economy functioning normally.
But the truth is that the Bank of Japan has already been printing money like crazy....

Is a tsunami of new yen really going to solve the economic damage that has been done by the earthquake and the tsunami?
Of course not.
The truth is that the economy of Japan was already deeply struggling before this disaster.
The national debt of Japan is now well over 200% of GDP and there seems to be no doubt that they will need to borrow massive amounts of money to deal with the aftermath of this crisis.
Up until now the Japanese government has been able to borrow money at ultra-low interest rates of around 1.30 percent for 10-year bonds, drawing on a huge pool of savings from its own citizens.
But in light of what has just happened, will the citizens of Japan still have enough resources to continue to fund the rampant spending of the Japanese government?
At this point, it is estimated that this gigantic mountain of debt breaks down to 7.5 million yen for every single citizen of Japan.
Politicians in Japan have been pledging for years to do something about all of this debt, but nobody has been able to make much progress.
Even before this disaster, the major credit rating agencies were warning that they may have to downgrade Japanese government debt. The earthquake and the tsunami are certainly not going to make the Japanese even more credit-worthy.
Hideo Kumano, the chief economist at Dai-ichi Life Research Institute, has said that a "tipping point" will come when world financial markets finally recognize that the government of Japan simply cannot afford to service its debt any longer....
"It's hard to predict when the bond market might collapse, but it would happen when the market judges that Japan's ability to finance its debt is not sustainable anymore."Is the massive tsunami that just hit Japan such a tipping point?
Other countries such as Greece and Ireland would have already collapsed if it had not been for the massive international bailouts that they received.
So who is going to bail Japan out?
This could potentially be one of the greatest economic disasters that the world has seen since World War 2.
With the world already on the verge of a major financial collapse, this is the last thing that world financial markets needed.
In fact, much of the rest of the world had been hoping that an influx of capital from Japan would help to stabilize things.
For example, Japanese insurance companies had recently announced that they were planning on buying up lots of European sovereign debt, but now obviously those plans are on hold. As a result of this disaster, Japanese insurance companies will be forced to sell off assets like crazy in order to pay settlements. But as Zero Hedge is correctly pointing out, without Japanese financial institutions stepping in to soak up Eurozone bonds this is going to make the European sovereign debt crisis even worse.
But right now the focus in on the devastation in Japan. At the moment it is unclear how much of the economic infrastructure of Japan has survived.
For example, as USA Today is reporting, some factories cannot even be reached by phone at this point....
Toyota's phone calls to its plants in affected areas were not being answered, said Shiori Hashimoto, a spokeswoman in Tokyo. The Toyota City-based carmaker began production at a new plant in Miyagi this year that makes Yaris compact cars and has capacity to make 120,000 vehicles a year.What is clear is that the cost of recovering and rebuilding after this disaster is going to put extraordinary financial stress on the Japanese government.
Julian Jessop of Capital Economics certainly does not sound optimistic about what this is going to mean for the Japanese economy....
"Japan's economic recovery has lost momentum and a large part of the reconstruction costs will add to the government's significant debt burden."Hopefully the full extent of the damage is not as bad as many are now fearing.
But the truth is that this is a huge, huge event for a world economy that was already on the verge of collapse.
May our thoughts and our prayers be with the Japanese people at this time.
This is truly one of the biggest disasters that any of us have ever seen, and Japan will never be the same again.
.
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Scientific American: Chernobyl ahora
Contaminantes radioactivos vida "útil" en la atmósfera:
Iodine-131 decae rapidamente en unos 3 meses
cesio-137 y estroncio 90, ambos tienen aproximadamente 30 años de vida media,
plutonio-239, uno de los principales isótopos en los reactores nucleares, tiene una media la vida de más de 24.000 años.
CHERNOBYL, Ukraine—The face mask and three radiation monitors I'm wearing here are grim reminders that I'm at the site of the worst nuclear accident in history. On April 26, 1986, 1:23:44 A.M. local time, explosions destroyed reactor No. 4 at the Chernobyl nuclear power plant, releasing approximately 400 times more radioactive fallout than the atomic bomb dropped on Hiroshima, according to the International Atomic Energy Agency.
Now, almost 25 years after the disaster, the Ukrainian government has officially opened the area up for tourism. But just how safe is the zone now?
Radiation
After the explosions, it was unclear how contaminated the surroundings were, so the authorities declared an arbitrary 30-kilometer distance from the reactor off-limits, and roughly 115,000 people were evacuated from the area. This "exclusion zone" is now open to tourism.
I drove to Chernobyl with health physicist Vadim Chumak at the Research Center for Radiation Medicine at the
Academy of Medical Sciences of Ukraine and his colleagues. A car shuttles there every week to collect stool samples from workers to test for any plutonium they might have accidentally absorbed. (Science, like journalism, can be a dirty job, but someone has to do it.)
The world is normally bathed in a low level of radiation. In Kiev, where I started my trip, one normally receives 0.1 millionths of a sievert every hour. This is pretty much the level of radiation we saw on the road on the roughly two-hour, 150-kilometer drive into the exclusion zone, but readings on our dosimeter temporarily climb up to 4.76 millionths of a sievert per hour when our car passes through the old path of the radioactive plume from the destroyed reactor.
How safe this area is now after the accident depends on what radioactive material was released and where it went. There are four kinds of radionuclides or radioactive isotopes that are of special concern at the site. Iodine-131 is rapidly absorbed by the thyroid gland and increases the risk of childhood thyroid cancer. Cesium-137 mimics potassium inside the body, seeking out muscle. Strontium-90 acts like calcium, attracted to bone. Plutonium-239 and other isotopes can stay in the body indefinitely, irradiating organs.
These four materials escaped from the explosions to varying distances, given factors such as their mass and melting points. Iodine-131 and cesium-137 were both very broadly transported hundreds of kilometers, while strontium-90 remained in dust just 30 kilometers from the power plant and plutonium traveled only four kilometers or so.
Iodine-131 decays rapidly, and was virtually gone from the environment after only three months, Chumak says. However, cesium-137 and strontium-90 both have approximately 30-year half-lives, meaning they each take roughly three decades for half their material to decay, and plutonium-239, one the main isotopes in nuclear reactors, has a half-life of more than 24,000 years.
After the disaster, both emergency workers dubbed "liquidators" and natural forces helped to reduce airborne levels of radiation. The liquidators sprayed detergents and latex-like binding solutions from helicopters and automobiles to bind contaminants. The roads were paved to cover radioactive dust, while ploughs flipped soil over to bury polluted soil. Meanwhile, rain helped contaminants migrate down into the ground.
The exclusion zone was possibly safe for tourism "about five years after the accident," Chumak says. Still, just because one can tour the area does not mean everywhere here is safe to tread. There are hot spots that remain highly contaminated, especially in the path of the radioactive plume. Where tourists are allowed to go and how long they will be allowed to stay will be strictly controlled to keep their risks of exposure down.
And there are some places here that remain too dangerous for tourists to go, such as the sarcophagus.
Inside the sarcophagus
Soon after firefighters extinguished the blazes from the explosions at Chernobyl, workers quickly built a structure of steel and concrete technically known as the Shelter Object but commonly known as the sarcophagus to entomb the remains of the damaged reactor and keep any more contaminants from escaping. It remains one of the most radioactive areas in the zone.
Nowadays, workers here maintain the corroding sarcophagus, monitor the radioactive material inside, and decontaminate what they can. To enter the structure with them, I strip down to only my underwear in a "clean room" and walk in a hospital gown and slippers into a "hot room," where I put on the pure white outfit given to everyone on site—scrubs, a jacket, trousers, a scrub cap, socks, gloves and a mask with the highest-grade filter available for dust. On top of that I don an overcoat, a hardhat and crusty boots. In addition, I am carrying the radiation
badge I had when I entered the 30-kilometer exclusion zone, a second radiation badge I was given when I entered the area of the plant, and a personal electronic dosimeter to tell me exactly how much radiation I am receiving.
(The workers don't normally wear lead shielding, and neither do I. Although lead can protect against radiation, it slows you down, thus increasing the dose you ultimately receive.)
The maximum dose of radiation that workers here are generally allowed on a daily shift is 0.1 thousandths of a sievert, the level of radiation one gets from a 90-minute transatlantic flight or from four hours watching a plasma screen television, says Vladimir Malyshev, chief safety officer at the Chernobyl nuclear power plant. When I am standing right in front of the sarcophagus, the readings leap up to 0.12 thousandths of a sievert per hour, or 1,200 times that seen in Kiev.
After passing an electronic checkpoint—one of a half-dozen or so that I stopped at—I find myself in the dark, gutted remains of the control room for reactor No. 4. Here engineers made the fateful errors that poisoned the Earth.
After returning from the sarcophagus, I leave everything I wore outside in a locker in the hot zone and take a mandatory shower to wash away any potential contamination. I don't think I've ever wanted to be clean more in my life.
Life and wildlife
Although Chernobyl might be safe for a day of tourism, living there is another question. The Ukrainian government did allow people who originally lived in the exclusion zone to resettle on an individual basis. For instance, some areas within 30 kilometers of the explosions are relatively clean, and the elderly would probably not absorb unhealthy levels of radiation in what time they had left, Chumak says.
However, some places remain too dangerous for resettlement. "People might be allowed to live in the 30-kilometer zone, but I don't expect anyone to live within the 10-kilometer zone, ever," Chumak says. "There's some plutonium there."
Officials there did say I should look out for wildlife in the zone. "A mad wolf attacked six people here recently," Malyshev says.
The disaster's impact on wildlife in the zone remains hotly contested. For instance, radiation biologist Ron Chesser at Texas Tech University in Lubbock and his colleagues suggest the area is thriving with life now that humans have left, finding that the wild boar population there has grown 10 to 15 times than what it was before the accident, and that other fauna are often seen in the area, such as wolves, rabbits, red deer, black storks and moose. Their genetic work suggests that any effects of radiation are subtle enough to not lead to any mutations passed down across generations, with the animals perhaps acclimatizing to any damage by boosting their genetic repair mechanisms. As bad as the radiation is, the effects of humans on the environment might have been worse, Chesser concludes.
On the other hand, biologist Tim Mousseau at the University of South Carolina at Columbia and his colleagues have found that species richness of forest birds was reduced by more than half when comparing sites with normal background levels of radiation to sites with the highest levels in the exclusion zone, and the numbers of bumblebees, grasshoppers, butter ies, dragonflies and spiders decreased too. Analysis of more than 7,700 barn swallows in Chernobyl and other areas in Ukraine and Europe suggested ones from in or near the exclusion zone had higher levels of abnormalities such as deformed toes, beaks and eyes or aberrant coloration, and recent work also suggests that birds living in areas with high levels of radiation around Chernobyl have smaller brains.
Both teams stand by their own work and suggest the other made errors related to geographic variability.
Tourist attraction?
So what can tourists see at Chernobyl? One can often see and feed giant catfish in the 22-square-kilometer nuclear power plant cooling pond, although during cold weather, the pond is frozen over and covered in snow. In the distance, one can also see a giant radar grid roughly 150 meters high—taller than the Great Pyramid of Giza's current height—once meant to track any nuclear missiles launched from the United States. "It needed a lot of power, which is why it was near Chernobyl," Chumak explains.
The city of Pripyat, abandoned after the accident, is frozen in time, with the Communist hammer and sickle still adorning streetlights here. Nature is reclaiming the area, with white birch and green pines hiding many of the blocky Soviet buildings and animal tracks fresh on the snow still covering the ground here in the first week of March.
By a dock near a riverside cafe in Pripyat, the scientists I traveled with started gathering pussy willows, completely unbidden. These flowers bloom under the snow, and the men want to bring them back for International Women's Day on March 8. "These mean spring," says physicist Vitalii Volosky at the Research Center for Radiation Medicine in Kiev.
Despite the official announcement, tourism to Chernobyl is nothing new—trips have been going there for about a decade. The recent publicity regarding tourism may have its roots in the economic impact of Chernobyl—even two decades after the disaster, roughly 6 percent of the national budgets of both Ukraine and Belarus were still devoted to Chernobyl-related benefits and programs, according to a 2005 report from the Chernobyl Forum, comprised of eight United Nations agencies and the governments of Ukraine, Belarus and Russia. "There is this motivation there to do what can be done to return some of this land to productive use," Mousseau says.
Among those who lived through the disaster, the idea of tourism to Chernobyl brings up strong emotions, just as it might for New Yorkers dealing with 9/11. "If we are wise, we will make Chernobyl a museum for humankind just like Hiroshima and Nagasaki," Chumak says.
Among the younger generation in Kiev, there is real interest in visiting. "My son really wants to go, as do a couple of young students here," Chumak says.
Still, for others, tourism to Chernobyl holds no attraction. "Personally, every trip I make there is not a positive one," says physicist Elena Bakhanova at the Research Center for Radiation Medicine in Kiev. "It was a human error, a sign of human foolishness."
Images: Charles Q. Choi in the control room for destroyed reactor No. 4 at the Chernobyl nuclear power plant; Health physicist Vadim Chumak at the Research Center for Radiation Medicine at the Academy of Medical Sciences of Ukraine in Kiev. He is wearing a respirator mask with the highest-grade filter available against aerosols, to protect against airborne contamination; The entrance to a "hot room" at the facility where workers at Chernobyl change their clothing. In the "clean room," I took off all my clothing except my underwear. In the hot room, I was given clothing to wear in the sarcophagus; Visitor's badge and radiation badge. The visitor's badge has a microchip scannable at electronic checkpoints. The radiation badge is a dosimeter that measures my exposure to radiation—the silver disk on the badge measures the radiation my skin received, while the black bump measured the levels deeper tissues experienced; This giant radar grid relatively close to the Chernobyl nuclear power plant was once meant to track any nuclear missiles launched from the United States. It is roughly 150 meters high, taller than the Great Pyramid of Giza's current height. Credit for all images: Charles Q. Choi.
About the Author: Charles Q. Choi (@cqchoi) is a frequent contributor to Scientific American. His work has also appeared in The New York Times, Science, Nature and Wired, among others. In his spare time, he has traveled to all seven continents. This post is the first in a series of stories from Chernobyl that Choi has written for Scientific American.
The views expressed are those of the author and are not necessarily those of Scientific American.
http://www.scientificamerican.com/blog/post.cfm?id=the-worst-nuclear-plant-accident-in-2011-03-14
Iodine-131 decae rapidamente en unos 3 meses
cesio-137 y estroncio 90, ambos tienen aproximadamente 30 años de vida media,
plutonio-239, uno de los principales isótopos en los reactores nucleares, tiene una media la vida de más de 24.000 años.
The worst nuclear plant accident in history: Live from Chernobyl
By Charles Choi | Mar 15, 2011 08:00 AM | 3
CHERNOBYL, Ukraine—The face mask and three radiation monitors I'm wearing here are grim reminders that I'm at the site of the worst nuclear accident in history. On April 26, 1986, 1:23:44 A.M. local time, explosions destroyed reactor No. 4 at the Chernobyl nuclear power plant, releasing approximately 400 times more radioactive fallout than the atomic bomb dropped on Hiroshima, according to the International Atomic Energy Agency.Now, almost 25 years after the disaster, the Ukrainian government has officially opened the area up for tourism. But just how safe is the zone now?
Radiation
After the explosions, it was unclear how contaminated the surroundings were, so the authorities declared an arbitrary 30-kilometer distance from the reactor off-limits, and roughly 115,000 people were evacuated from the area. This "exclusion zone" is now open to tourism.
I drove to Chernobyl with health physicist Vadim Chumak at the Research Center for Radiation Medicine at the
Academy of Medical Sciences of Ukraine and his colleagues. A car shuttles there every week to collect stool samples from workers to test for any plutonium they might have accidentally absorbed. (Science, like journalism, can be a dirty job, but someone has to do it.)The world is normally bathed in a low level of radiation. In Kiev, where I started my trip, one normally receives 0.1 millionths of a sievert every hour. This is pretty much the level of radiation we saw on the road on the roughly two-hour, 150-kilometer drive into the exclusion zone, but readings on our dosimeter temporarily climb up to 4.76 millionths of a sievert per hour when our car passes through the old path of the radioactive plume from the destroyed reactor.
How safe this area is now after the accident depends on what radioactive material was released and where it went. There are four kinds of radionuclides or radioactive isotopes that are of special concern at the site. Iodine-131 is rapidly absorbed by the thyroid gland and increases the risk of childhood thyroid cancer. Cesium-137 mimics potassium inside the body, seeking out muscle. Strontium-90 acts like calcium, attracted to bone. Plutonium-239 and other isotopes can stay in the body indefinitely, irradiating organs.
These four materials escaped from the explosions to varying distances, given factors such as their mass and melting points. Iodine-131 and cesium-137 were both very broadly transported hundreds of kilometers, while strontium-90 remained in dust just 30 kilometers from the power plant and plutonium traveled only four kilometers or so.
Iodine-131 decays rapidly, and was virtually gone from the environment after only three months, Chumak says. However, cesium-137 and strontium-90 both have approximately 30-year half-lives, meaning they each take roughly three decades for half their material to decay, and plutonium-239, one the main isotopes in nuclear reactors, has a half-life of more than 24,000 years.
Chernobyl: Timeline of a Tragedy on Dipity.
After the disaster, both emergency workers dubbed "liquidators" and natural forces helped to reduce airborne levels of radiation. The liquidators sprayed detergents and latex-like binding solutions from helicopters and automobiles to bind contaminants. The roads were paved to cover radioactive dust, while ploughs flipped soil over to bury polluted soil. Meanwhile, rain helped contaminants migrate down into the ground.
The exclusion zone was possibly safe for tourism "about five years after the accident," Chumak says. Still, just because one can tour the area does not mean everywhere here is safe to tread. There are hot spots that remain highly contaminated, especially in the path of the radioactive plume. Where tourists are allowed to go and how long they will be allowed to stay will be strictly controlled to keep their risks of exposure down.
And there are some places here that remain too dangerous for tourists to go, such as the sarcophagus.
Inside the sarcophagus
Soon after firefighters extinguished the blazes from the explosions at Chernobyl, workers quickly built a structure of steel and concrete technically known as the Shelter Object but commonly known as the sarcophagus to entomb the remains of the damaged reactor and keep any more contaminants from escaping. It remains one of the most radioactive areas in the zone.
Nowadays, workers here maintain the corroding sarcophagus, monitor the radioactive material inside, and decontaminate what they can. To enter the structure with them, I strip down to only my underwear in a "clean room" and walk in a hospital gown and slippers into a "hot room," where I put on the pure white outfit given to everyone on site—scrubs, a jacket, trousers, a scrub cap, socks, gloves and a mask with the highest-grade filter available for dust. On top of that I don an overcoat, a hardhat and crusty boots. In addition, I am carrying the radiation
badge I had when I entered the 30-kilometer exclusion zone, a second radiation badge I was given when I entered the area of the plant, and a personal electronic dosimeter to tell me exactly how much radiation I am receiving. (The workers don't normally wear lead shielding, and neither do I. Although lead can protect against radiation, it slows you down, thus increasing the dose you ultimately receive.)
The maximum dose of radiation that workers here are generally allowed on a daily shift is 0.1 thousandths of a sievert, the level of radiation one gets from a 90-minute transatlantic flight or from four hours watching a plasma screen television, says Vladimir Malyshev, chief safety officer at the Chernobyl nuclear power plant. When I am standing right in front of the sarcophagus, the readings leap up to 0.12 thousandths of a sievert per hour, or 1,200 times that seen in Kiev.
After passing an electronic checkpoint—one of a half-dozen or so that I stopped at—I find myself in the dark, gutted remains of the control room for reactor No. 4. Here engineers made the fateful errors that poisoned the Earth.
After returning from the sarcophagus, I leave everything I wore outside in a locker in the hot zone and take a mandatory shower to wash away any potential contamination. I don't think I've ever wanted to be clean more in my life.
Life and wildlife
Although Chernobyl might be safe for a day of tourism, living there is another question. The Ukrainian government did allow people who originally lived in the exclusion zone to resettle on an individual basis. For instance, some areas within 30 kilometers of the explosions are relatively clean, and the elderly would probably not absorb unhealthy levels of radiation in what time they had left, Chumak says.
However, some places remain too dangerous for resettlement. "People might be allowed to live in the 30-kilometer zone, but I don't expect anyone to live within the 10-kilometer zone, ever," Chumak says. "There's some plutonium there."
Officials there did say I should look out for wildlife in the zone. "A mad wolf attacked six people here recently," Malyshev says.
The disaster's impact on wildlife in the zone remains hotly contested. For instance, radiation biologist Ron Chesser at Texas Tech University in Lubbock and his colleagues suggest the area is thriving with life now that humans have left, finding that the wild boar population there has grown 10 to 15 times than what it was before the accident, and that other fauna are often seen in the area, such as wolves, rabbits, red deer, black storks and moose. Their genetic work suggests that any effects of radiation are subtle enough to not lead to any mutations passed down across generations, with the animals perhaps acclimatizing to any damage by boosting their genetic repair mechanisms. As bad as the radiation is, the effects of humans on the environment might have been worse, Chesser concludes.
On the other hand, biologist Tim Mousseau at the University of South Carolina at Columbia and his colleagues have found that species richness of forest birds was reduced by more than half when comparing sites with normal background levels of radiation to sites with the highest levels in the exclusion zone, and the numbers of bumblebees, grasshoppers, butter ies, dragonflies and spiders decreased too. Analysis of more than 7,700 barn swallows in Chernobyl and other areas in Ukraine and Europe suggested ones from in or near the exclusion zone had higher levels of abnormalities such as deformed toes, beaks and eyes or aberrant coloration, and recent work also suggests that birds living in areas with high levels of radiation around Chernobyl have smaller brains.
Both teams stand by their own work and suggest the other made errors related to geographic variability.
Tourist attraction?So what can tourists see at Chernobyl? One can often see and feed giant catfish in the 22-square-kilometer nuclear power plant cooling pond, although during cold weather, the pond is frozen over and covered in snow. In the distance, one can also see a giant radar grid roughly 150 meters high—taller than the Great Pyramid of Giza's current height—once meant to track any nuclear missiles launched from the United States. "It needed a lot of power, which is why it was near Chernobyl," Chumak explains.
The city of Pripyat, abandoned after the accident, is frozen in time, with the Communist hammer and sickle still adorning streetlights here. Nature is reclaiming the area, with white birch and green pines hiding many of the blocky Soviet buildings and animal tracks fresh on the snow still covering the ground here in the first week of March.
By a dock near a riverside cafe in Pripyat, the scientists I traveled with started gathering pussy willows, completely unbidden. These flowers bloom under the snow, and the men want to bring them back for International Women's Day on March 8. "These mean spring," says physicist Vitalii Volosky at the Research Center for Radiation Medicine in Kiev.
Despite the official announcement, tourism to Chernobyl is nothing new—trips have been going there for about a decade. The recent publicity regarding tourism may have its roots in the economic impact of Chernobyl—even two decades after the disaster, roughly 6 percent of the national budgets of both Ukraine and Belarus were still devoted to Chernobyl-related benefits and programs, according to a 2005 report from the Chernobyl Forum, comprised of eight United Nations agencies and the governments of Ukraine, Belarus and Russia. "There is this motivation there to do what can be done to return some of this land to productive use," Mousseau says.
Among those who lived through the disaster, the idea of tourism to Chernobyl brings up strong emotions, just as it might for New Yorkers dealing with 9/11. "If we are wise, we will make Chernobyl a museum for humankind just like Hiroshima and Nagasaki," Chumak says.
Among the younger generation in Kiev, there is real interest in visiting. "My son really wants to go, as do a couple of young students here," Chumak says.
Still, for others, tourism to Chernobyl holds no attraction. "Personally, every trip I make there is not a positive one," says physicist Elena Bakhanova at the Research Center for Radiation Medicine in Kiev. "It was a human error, a sign of human foolishness."
Images: Charles Q. Choi in the control room for destroyed reactor No. 4 at the Chernobyl nuclear power plant; Health physicist Vadim Chumak at the Research Center for Radiation Medicine at the Academy of Medical Sciences of Ukraine in Kiev. He is wearing a respirator mask with the highest-grade filter available against aerosols, to protect against airborne contamination; The entrance to a "hot room" at the facility where workers at Chernobyl change their clothing. In the "clean room," I took off all my clothing except my underwear. In the hot room, I was given clothing to wear in the sarcophagus; Visitor's badge and radiation badge. The visitor's badge has a microchip scannable at electronic checkpoints. The radiation badge is a dosimeter that measures my exposure to radiation—the silver disk on the badge measures the radiation my skin received, while the black bump measured the levels deeper tissues experienced; This giant radar grid relatively close to the Chernobyl nuclear power plant was once meant to track any nuclear missiles launched from the United States. It is roughly 150 meters high, taller than the Great Pyramid of Giza's current height. Credit for all images: Charles Q. Choi.
About the Author: Charles Q. Choi (@cqchoi) is a frequent contributor to Scientific American. His work has also appeared in The New York Times, Science, Nature and Wired, among others. In his spare time, he has traveled to all seven continents. This post is the first in a series of stories from Chernobyl that Choi has written for Scientific American.The views expressed are those of the author and are not necessarily those of Scientific American.
http://www.scientificamerican.com/blog/post.cfm?id=the-worst-nuclear-plant-accident-in-2011-03-14
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