TOKYO - Perhaps in order not to alarm the Japanese authorities do not have much information about the incident at the nuclear plant in Fukushima. In the Italian night, the situation back under control seems to - as confirmed by the International Atomic Energy Agency - the first while they are contaminated.
Three are chosen to sample between the 90 patients evacuated to a hospital, five kilometers from the central place. The authorities ordered the expulsion of 140 000 people living within a radius of twenty kilometers from the plant, a measure "purely precautionary," said the Agency for Nuclear and Industrial Safety in Japan.
According to the World Health Organization (WHO), the overall risk to health is "probably pretty low." VIDEO of the incident. The No. 1 reactor of the plant in Fukushima has had serious problems to the cooling system: first the escape of smoke, then an explosion - the nature of which is unclear - has shattered the containment cage, forcing the Japanese government to declare emergency "atomic" and expand the size of the evacuation of 10 to 20 km, for a total of 140 thousand evacuated.
Prime Minister Naoto Kan reassures that there are no serious damage, but admitted the loss "minimum" of radioactive material. TEPCO, the operator of the plant, said the body of the reactor is not damaged, despite the powerful explosion. However, the radiation level reached around the area is 1,000 times higher than normal ", tells the Japanese Agency for Nuclear Safety.
Another incident in the evening. Another problem reported to the reactor plant three Fukushima, ddopo that to number one. The cooling system had a technical problem and the safety systems are trying to enter the water to prevent overheating. Nine people could be contaminated. Opposing thesis.
For the American nuclear expert Joseph Cirincione, director of Ploughsares Fund, the incident "is already blocked if one of the three worst" after the Chernobyl disaster in 1986 and that of Three Mile Island reactor in Pennsylvania in 1979. According to Cirincione, the information provided by the Japanese authorities in this regard is currently lacking.
"The question that remains unanswered is whether there are still structural damage to the facility that could worsen the situation. And for this the company has not given precise information." The presence of radioactive Celsius in the atmosphere, the expert explained, "indicates that a partial melting of the reactor core is already in progress." At the moment, and with the information now available, there are "significant release" of radioactivity, "where they continue the procedures of cooling" and "container ensures its function," said Lamberto Matteocci Ansa, in charge of monitoring the nuclear activities of Department of the Higher Institute for Nuclear Protection and Environmental Research (Ispra).
Substantial agreement also Russian nuclear experts, who consider the likely risk of another Chernobyl. The head of Russian Atomic Energy Agency (Rosatom), Serghiei Kirienko, called unlikely to trigger a nuclear reaction: "In our opinion, there should be," he said in the afternoon. The same opinion was that the Deputy Director of the Institute of Nuclear Physics of Moscow Kurciatov, Yaroslav Strombach: the incident "does not look like that of Chernobyl and a similar reaction" to one that occurred 25 years ago, "there can be." Incident at level 4.
Difficult at present to determine exactly the level of radioactivity released into the environment, but the incident was assessed at level 4 on a scale from 0 to 7: 4 shows a nuclear reactor accident "with local consequences." To illustrate the gravity compared to other disasters cited by the experts, the accident at Three Mile Island in 1979 was valued at 5, 7 and arrived at Chernobyl.
Scenarios. Incident, the physical Cnr Valerio Rossi Albertini suggested "overheating due to lack of coolant that has produced an explosion of traditional and non-nuclear kind, a kind of" radiator effect "where excessive pressure has produced an explosion. So there was a burst of steam "controlled to avoid hazards and prevent further".
At worst, the uranium fuel rods inside the reactor can overheat to the point above that of melting and melt. The material could escape from the restraints and spread in the environment. At the moment the most plausible scenario appears to coincide with the hypothesis less worrying is that the explosion, according to reconstruct what the expert has "focused on the conventional part of the system and not the containment of the reactor." The procedures of cooling and still keep the "container ensures its function." Contamination and health risks.
There are three elements to be monitored to determine possible contamination of nearby residents to the central Fukushima: Iodine-131 (I-131), Cesium 137 (Cs-137) and Strontium 90 (Sr-90). He explains it - always agency Ansa - Professor Mauro Liberatore expert in nuclear medicine of the University Sapienza of Rome.
These elements, a sign of possible radioactive leak from the plant can be harmful if taken in high doses, especially for the formation of tumors. The possible health risks depend on the absorbed radiation doses: If we talk about low probability assessments, and if the risk is high. The pills of iodine 131 that the Japanese government is preparing to distribute to residents in the areas of nuclear power plants affected by yesterday's earthquake is the only antidote currently available in large quantities in cases of emergency.
"The radiation contamination - said Professor Paul Vitti Institute of Nuclear Medicine of Pisa - occurs mainly in two ways, by direct radiation or by ingestion of contaminated food. Iodine pills 'stable' are used to saturate the thyroid blocking that is contaminated by iodine 'unstable', which damages the cell at the level of DNA and thereby facilitate the development of cancer.
" The cesium 137 and strontium 89 are deposited in the food, but they have much longer. Usually lead to leukemia and cancer spread throughout the body. In particular, iodine 131 is absorbed by the thyroid gland and has a half life of one week. For this reason, iodine tablets are given the 'cold' to prevent the accumulation of the external called 'hot' organ and facilitate elimination via the urine.
The Cesium 137 is an element which is mobile, does not disperse easily in the environment but there is deposited and thus can enter the food chain (grass, animals and milk) and accumulates in bones. It has a half-life of approximately 30 years. Strontium 90 on the other hand is very mobile in the environment and is soluble in water, it disperses easily and is also at great distances from the crash site, taken with water and fishery products accumulates in the bones.
"At the time of Chernobyl," said Vitti, "made in Poland in time to put in place a prior distribution of iodine and this significantly reduced the number of tumors compared to neighboring Ukraine." "At the moment - he said - is not yet clear what kind of radioactive exposure is. The lack or absence of iodine is a key factor in the spread of these cancers." In this sense - he concludes Vitti - Japan is relatively protected as is one of the world where there is a very high iodine intake, 3-4 times as much of Europe, thanks to food linked to the fish.
" 
Three are chosen to sample between the 90 patients evacuated to a hospital, five kilometers from the central place. The authorities ordered the expulsion of 140 000 people living within a radius of twenty kilometers from the plant, a measure "purely precautionary," said the Agency for Nuclear and Industrial Safety in Japan.
According to the World Health Organization (WHO), the overall risk to health is "probably pretty low." VIDEO of the incident. The No. 1 reactor of the plant in Fukushima has had serious problems to the cooling system: first the escape of smoke, then an explosion - the nature of which is unclear - has shattered the containment cage, forcing the Japanese government to declare emergency "atomic" and expand the size of the evacuation of 10 to 20 km, for a total of 140 thousand evacuated.
Prime Minister Naoto Kan reassures that there are no serious damage, but admitted the loss "minimum" of radioactive material. TEPCO, the operator of the plant, said the body of the reactor is not damaged, despite the powerful explosion. However, the radiation level reached around the area is 1,000 times higher than normal ", tells the Japanese Agency for Nuclear Safety.
Another incident in the evening. Another problem reported to the reactor plant three Fukushima, ddopo that to number one. The cooling system had a technical problem and the safety systems are trying to enter the water to prevent overheating. Nine people could be contaminated. Opposing thesis.
For the American nuclear expert Joseph Cirincione, director of Ploughsares Fund, the incident "is already blocked if one of the three worst" after the Chernobyl disaster in 1986 and that of Three Mile Island reactor in Pennsylvania in 1979. According to Cirincione, the information provided by the Japanese authorities in this regard is currently lacking.
"The question that remains unanswered is whether there are still structural damage to the facility that could worsen the situation. And for this the company has not given precise information." The presence of radioactive Celsius in the atmosphere, the expert explained, "indicates that a partial melting of the reactor core is already in progress." At the moment, and with the information now available, there are "significant release" of radioactivity, "where they continue the procedures of cooling" and "container ensures its function," said Lamberto Matteocci Ansa, in charge of monitoring the nuclear activities of Department of the Higher Institute for Nuclear Protection and Environmental Research (Ispra).
Substantial agreement also Russian nuclear experts, who consider the likely risk of another Chernobyl. The head of Russian Atomic Energy Agency (Rosatom), Serghiei Kirienko, called unlikely to trigger a nuclear reaction: "In our opinion, there should be," he said in the afternoon. The same opinion was that the Deputy Director of the Institute of Nuclear Physics of Moscow Kurciatov, Yaroslav Strombach: the incident "does not look like that of Chernobyl and a similar reaction" to one that occurred 25 years ago, "there can be." Incident at level 4.
Difficult at present to determine exactly the level of radioactivity released into the environment, but the incident was assessed at level 4 on a scale from 0 to 7: 4 shows a nuclear reactor accident "with local consequences." To illustrate the gravity compared to other disasters cited by the experts, the accident at Three Mile Island in 1979 was valued at 5, 7 and arrived at Chernobyl.
Scenarios. Incident, the physical Cnr Valerio Rossi Albertini suggested "overheating due to lack of coolant that has produced an explosion of traditional and non-nuclear kind, a kind of" radiator effect "where excessive pressure has produced an explosion. So there was a burst of steam "controlled to avoid hazards and prevent further".
At worst, the uranium fuel rods inside the reactor can overheat to the point above that of melting and melt. The material could escape from the restraints and spread in the environment. At the moment the most plausible scenario appears to coincide with the hypothesis less worrying is that the explosion, according to reconstruct what the expert has "focused on the conventional part of the system and not the containment of the reactor." The procedures of cooling and still keep the "container ensures its function." Contamination and health risks.
There are three elements to be monitored to determine possible contamination of nearby residents to the central Fukushima: Iodine-131 (I-131), Cesium 137 (Cs-137) and Strontium 90 (Sr-90). He explains it - always agency Ansa - Professor Mauro Liberatore expert in nuclear medicine of the University Sapienza of Rome.
These elements, a sign of possible radioactive leak from the plant can be harmful if taken in high doses, especially for the formation of tumors. The possible health risks depend on the absorbed radiation doses: If we talk about low probability assessments, and if the risk is high. The pills of iodine 131 that the Japanese government is preparing to distribute to residents in the areas of nuclear power plants affected by yesterday's earthquake is the only antidote currently available in large quantities in cases of emergency.
"The radiation contamination - said Professor Paul Vitti Institute of Nuclear Medicine of Pisa - occurs mainly in two ways, by direct radiation or by ingestion of contaminated food. Iodine pills 'stable' are used to saturate the thyroid blocking that is contaminated by iodine 'unstable', which damages the cell at the level of DNA and thereby facilitate the development of cancer.
" The cesium 137 and strontium 89 are deposited in the food, but they have much longer. Usually lead to leukemia and cancer spread throughout the body. In particular, iodine 131 is absorbed by the thyroid gland and has a half life of one week. For this reason, iodine tablets are given the 'cold' to prevent the accumulation of the external called 'hot' organ and facilitate elimination via the urine.
The Cesium 137 is an element which is mobile, does not disperse easily in the environment but there is deposited and thus can enter the food chain (grass, animals and milk) and accumulates in bones. It has a half-life of approximately 30 years. Strontium 90 on the other hand is very mobile in the environment and is soluble in water, it disperses easily and is also at great distances from the crash site, taken with water and fishery products accumulates in the bones.
"At the time of Chernobyl," said Vitti, "made in Poland in time to put in place a prior distribution of iodine and this significantly reduced the number of tumors compared to neighboring Ukraine." "At the moment - he said - is not yet clear what kind of radioactive exposure is. The lack or absence of iodine is a key factor in the spread of these cancers." In this sense - he concludes Vitti - Japan is relatively protected as is one of the world where there is a very high iodine intake, 3-4 times as much of Europe, thanks to food linked to the fish.
"
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