Radioactive water travelling from Fukushima power plant being measured by scientists
Researchers are attempting to predict the amount of radioactive water from Japan that will hit the North American coast.
The concentration of radioactive water from the Fukushima power plant in Japan expected to hit North American coasts should be known in the next two months.
So far only small traces of pollution have been recorded in Canadian continental waters, but this is expected to increase as contaminants move eastwards on Pacific currents, BBC News has reported.
In 2011, three nuclear reactors at the Japanese facility went into meltdown, leaking radiation into the Pacific Ocean.
Researchers from the Bedford Institute of Oceanography in Canada have been analysing water along a line running almost 2,000km due west of Vancouver, British Columbia, since the 2011 Fukushima accident.
In June 2013, radioactive caesium-137 and 134 were detected in the entire line of the sampling length.
Scientists stress that even with the probable increases taken into account, the measurements will be well within limits set by safety authorities.
Researchers have harnessed the radioactive water to test two forecasting models to try and map the probable future progression of the plume of radioactive water.
Using one model, the scientists have predicted that a maximum concentration of 27 becquerels per cubic metre of water will appear on the Canadian coast by mid-2015, but the other model predicts no more than about two becquerels per cubic metre of water.
Bedford’s Dr John Smith told BBC News that further measurements currently being taken in the ocean should give researchers a fair idea of which model is correct.
How Radioactive Is Our Ocean: current sample locations
Speaking to reporters at the Ocean Sciences Meeting 2014 in Honolulu, Hawaii, he also stressed: “These levels are still well below maximum permissible concentrations in drinking water in Canada for caesium-137 of 10,000 becquerels per cubic metre of water – so, it’s clearly not an environmental or human-health radiological threat.”
Dr Ken Buesseler from the Woods Hole Oceanographic Institution (WHOI), who was also speaking on a Fukushima panel at the event, described how citizens are involved in the effort to record radioactivity in beach waters on the western United States.
Members of the public are being recruited to regularly gather water samples from California to Washington State and in Alaska and Hawaii.
Caesium-134 has not yet been detected in these areas, but Caesium-137, which was also released by the damaged power plant, is already present in the water after A-bomb tests in the 1950s and 1960s.
However, Dr Buesseler expects a specific Fukushima signal from both radionuclides to be evident very shortly in US waters.
The ourradioactiveocean.org sampling project, which is organised at the website, is being funded through private donation because no federal agency has picked up the monitoring responsibility.
“What we have to go by right now are models, and as John Smith showed these predict numbers as high as 30 of these becquerels per cubic metre of water,” he told the BBC.
“It’s interesting: if this was of greater health concern, we’d be very worried about these factors of ten differences in the models.
“To my mind, this is not really acceptable," he said.
Mr Smith added: "We need better studies and resources to do a better job, because there are many reactors on coasts and rivers and if we can’t predict within a factor of 10 what caesium or some other isotope is downstream - I think that’s a pretty poor job.“
Chimpanzees may have a similar sense of right and wrong to humans, new study finds
Greenham Reach: The families trying to prove that compact, ecological farms can make a living
Thousands of people killed by extreme weather in 2015 as El Nino arrives to bring more chaos
The Eastern Cougar will be officially listed as extinct — almost 80 years after last sighting
A spotter's guide to a wild orchid summer
- 1 Kim Jong-un shows off airport designed by architect he likely had executed
- 2 Tunisia hotel attack: Locals form 'human shield' to protect hotel from gunman Seifeddine Rezgui
- 3 Why it matters 26 million people have changed their Facebook profile picture to a rainbow flag
- 4 German ethics council calls for incest between siblings to be legalised by Government
- 5 Fifty Shades of Grey author E.L James's Twitter Q&A didn't go exactly as planned
The moment a Queen's Guard soldier lost it and drew his gun at annoying tourist
Greece crisis: The wider lesson is that it’s time to abandon this failed experiment in currencies
'I wish the BBC would stop calling it Islamic State' – David Cameron unleashes frustration at broadcaster
David Cameron struck double blow in his hopes to win Britain a new EU deal
Extend Right To Buy to tenants of private landlords, Labour's Jeremy Corbyn says
Pentagon accuses Russia of 'playing with fire' over nuclear threats towards Nato
£15000 - £18000 per annum: Recruitment Genius: An On-line Sales & Customer Ser...
£15000 per annum: Recruitment Genius: One of the largest hospitality companies...
£28000 - £32000 per annum: Recruitment Genius: As a result of significant cont...
£16575 - £19000 per annum: Recruitment Genius: An excellent opportunity is ava...