Obviously this is a massive public health issue [...] if it gets into the ocean obviously this could be spread throughout the Pacific, could also get into the food supply. - Michael Arnold, WSJOnlineBBC: Water crisis at #Fukushima has only just begun — “Plant sits smack in the middle of an underground aquifer” — It’s rapidly being overwhelmed deep beneath ground (VIDEO)
NYTimes: 400 tons of highly radioactive water going into Pacific each day from Fukushima plant, says Tepco — Top Nuclear Regulator: This is a crisis
Published: August 6th, 2013 at 1:26 pm ET
Source: Wall St. Journal
Date: August 6, 2013
The WSJ’s Michael Arnold and Phred Dvorak discuss the challenges for containment
At 3:00 in
Michael Arnold: Obviously this is a massive public health issue [...] if it gets into the ocean obviously this could be spread throughout the Pacific, could also get into the food supply.
At 4:00 in
Phred Dvorak: A lot of experts say you just can’t stop the water [...] it’s very hard to actually stop it. What many people are saying is that Tepco will eventually have to process water, remove as much of the radioactive elements as possible and dump a certain amount in to the ocean that’s ‘relatively’ clean. [...]
Arnold: Certainly this is a story we’re going to stay on top off [...] Something that much of the world is watching.
BBC: Water crisis at Fukushima has only just begun — “Plant sits smack in the middle of an underground aquifer” — It’s rapidly being overwhelmed deep beneath ground (VIDEO)
Oregon Health Officials: We are actively monitoring the situation in Japan — We are not ‘yet’ mobilizing in response to the news — We will respond with enhanced efforts as appropriate »
Tiny amounts of caesium-137 and caesium-134 were detected in 15 bluefin caught near San Diego in August last year, according to a study published on Monday in the Proceedings of the National Academy of Sciences journal.
The levels were 10 times higher than those found in tuna in the same area in previous years, but still well below those that the Japanese and US governments consider a risk to health. Japan recently introduced a new safety limit of 100 becquerels per kilogram in food.
The timing of the discovery suggests that the fish, a prized but dangerously overfished delicacy in Japan, had carried the radioactive materials across the Pacific ocean faster than those conveyed by wind or water.
The researchers, led by Daniel Madigan at Stanford University, said they had found evidence that the fish had been contaminated at "modestly elevated" levels with caesium. The chemical was released into the ocean in the wake of the accident at Fukushima Daiichi on 11 March 2011.
Madigan told Reuters: "I wouldn't tell anyone what's safe to eat or what's not safe to eat. It's become clear that some people feel that any amount of radioactivity, in their minds, is bad and they'd like to avoid it. But compared to what's there naturally ... and what's established as safety limits, it's not a large amount at all."
The fish are thought to have been exposed to radiation for about a month before beginning their journey east across the Pacific. They were found to contain 4 becquerels per kilogram of caesium-134 and 6.3 becquerels per kilogram of caesium-137, the report said. A 2008 study of fish in the area found no evidence of caesium-134, which is produced only by nuclear power plants and weapons, and caesium-137 only at levels that naturally occur in the environment.
The results "are unequivocal. Fukushima was the source", said Ken Buesseler of the Woods Hole Oceanographic Institution, who played no part in the research.
Japan's chief cabinet secretary, Osamu Fujimura, conceded that the findings suggested the monitoring of radiation levels in fish outside Japanese waters may have to be stepped up.
The spawning and migratory patterns of bluefin tuna indicate that the issue of contaminated fish will be confined to Pacific coastlines.
Bluefin spawn only in the western Pacific, off the coasts of Japan and the Philippines. Some juvenile or adolescent fish migrate east to the coast of California coast and remain there to fatten up.
Scientists say they do not believe contamination will linger in large fish capable of swimming farther afield, as they are able to metabolise and excrete radioactive substances.
The fish examined in the US study weighed an average of 15 pounds. They had shed some of the radionuclides during their journey but had been unable to flush them out altogether.
"We were frankly kind of startled," said Nicholas Fisher, an expert at Stony Brook University in New York who took part in the study. "That's a big ocean. To swim across it and still retain these radionuclides is pretty amazing."
The operator of the Fukushima Daiichi plant, Tokyo Electric Power, estimates that 18,000 terabecquerels of radioactive materials flowed into the Pacific after the accident, either in the form of fallout, or through mixing with water that leaked from the facility. A terabecquerel is equal to 1tn becquerels.
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