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TECH SPACE
Six workers exposed to high radiation at Japan plant

Fukushima cloud now at the Atlantic, no risk - France
Paris (AFP) March 19, 2011 - The plume from Fukushima has now reached the western Atlantic but its radioactivity is likely to be "extremely low" and have no impact on health or the environment, France's Institute for Radiological Protection and Nuclear Safety (IRSN) said on Saturday. "As of yesterday, the cloud covered most of North America and northeastern Siberia. It is currently passing over the North Atlantic," it said, naming French terroritories in the Caribbean and off Canada's eastern coast. The cloud has been progressively thinning as it heads eastwards around the northern hemisphere at high altitude and will reach mainland Europe on Wednesday or Thursday, it said, citing a computer model jointly compiled with the French weather service, Meteo France.

"The concentrations of caesium 137 in the air over land traversed by the plume are expected to be extremely low," it said. In France, "these concentrations will be at a level that is too low to be detected." Caesium 137 is a long-lasting radioactive contaminant that caused the worst environmental problems in the 1986 Chernobyl disaster. "The IRSN shares the view of the US Environmental Protection Agency (EPA), which judges that these levels will have no impact on health and the environment," the agency said in a press statement. "Furthermore, they will be so minimal that they will probably will only be detected in the environment by measuring samples carried out by specialised laboratories." The map will be placed on the IRSN website (www.irsn.fr), it said.
by Staff Writers
Osaka, Japan (AFP) March 20, 2011
Six workers at a quake-stricken nuclear power plant have been exposed to high levels of radiation but are continuing working there, its operator said Sunday.

They have been exposed to more than 100 millisieverts of radiation, an official at the Tokyo Electric Power Co. said, adding he had no information on what tasks they were assigned to.

"There has been no adverse effect on their health," Takeo Iwamoto said. It was not immediately known if they had been reassigned to different tasks.

The government set 100 millisieverts as a limit for work in an emergency operation at a nuclear power plant in Japan. But the threshold has been raised to 250 for the on-going crisis at the Fukushima No. 1 plant.

The limit for work in a normal situation at a nuclear power plant is 50 millisieverts.

A 9.0-magnitude quake on March 11, followed by aftershocks and colossal tsunami waves, damaged the cooling systems of the plant, some 250 kilometres (155 miles) northeast of Tokyo, leaving it on the brink of a meltdown.

earlier related report
IAEA warns of risks in radioactive contaminated food
Vienna (AFP) March 19, 2011 - UN nuclear watchdog IAEA warned Saturday of the risks to humans of ingesting contaminated food products, after Japan said it had detected abnormal levels of radioactivity in milk and spinach.

Japan's health ministry had confirmed that the substance found in higher-than-usual doses in foods near the quake-damaged Fukushima No.1 plant northeast of Tokyo was radioactive iodine, the International Atomic Energy Agency said in a statement.

"Though radioactive iodine has a short half-life of about eight days and decays naturally within a matter of weeks, there is a short-term risk to human health if radioactive iodine in food is absorbed into the human body," the Vienna-based body warned.

"If ingested, it can accumulate in and cause damage to the thyroid."

"Children and young people are particularly at risk of thyroid damage due to the ingestion of radioactive iodine," it added.

Taking stable iodine -- as opposed to radioactive iodine -- tablets could however help prevent the harmful substance from accumulating in the thyroid, the watchdog said, noting that Japanese authorities had recommended evacuees from the plant's vicinity to take these precautions and that tablets and syrups had been distributed in evacuation centres around Japan.

No other radioactive isotopes had been found in food products in unusual doses, it added.

Japan announced earlier Saturday that it had detected abnormal levels of radiation in milk and spinach near the nuclear plant, which was critically damaged after last week's earthquake and tsunami, sending radioactive substances into the air.

Traces of radioactive substances were also detected in Japan's tap water.

However, the government reassured that both the food and the water did not present "an immediate health threat."

The food contamination was measured between March 16 and 18, said the IAEA, which has been monitoring developments at the nuclear plant for the past week.

IAEA director general Yukiya Amano also flew to Japan on Thursday to talk to nuclear and government officials there.

earlier related report
No contamination risk to Russia from Japan: Putin
Moscow (AFP) March 19, 2011 - Russian Prime Minister Vladimir Putin said Saturday that Russia runs no risk of radiocative contamination after the incidents at the Japanese Fukushima nuclear power plant.

"There is no scenario that foresees a worsening of the situation on the territory of Russia," he said during a visit to the island of Sakhalin, which lies close to Japan, according to Russian news agencies.

There is anxiety in the Russian Far East about the possible arrival of nuclear contamination from Fukushima.

Vladimir Asmolov, deputy director of the Russian nuclear energy company Rosenergoatom, backed up Putin's remarks.

"There is no radioactive risk, everything else is speculation," he said.

Local authorities in the Russian Far East say that since Sunday they have increased measurements of radioactivity and that so far levels are within normal limits.

But the 175,000 inhabitants of Sakhalin and those living in the Primorie region, the capital of which is Vladivostok, have shown signs of anxiety, buying dosimeters and iodine capsules to swallow in case of contamination.

Putin, president from 2000 to 2008, makes a habit of visits or spectacular actions in crisis situations, helping his popularity and strongman image.



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Miyako, Japan (AFP) March 19, 2011
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