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The Mox nuclear fuel plant at Sellafield was closed on Wednesday , with the loss of around 600 jobs.The closure is a consequence of the Fukushima incident in Japan in March, which has closed down much of the nuclear industry there and led to a rethink of nuclear power around the world. But the government said the move had "no implications" for the UK's plans for new nuclear reactors.

Workers at the plant were told on Wednesday morning that there was "considerable scope" for them to be re-employed in other parts of the Sellafield complex.It will take several months for the plant to close fully.The west Cumbrian mixed-oxide fuel plant has cost the taxpayer £1.4bn since it was commissioned in the early 1990s.

The NDA denied there were any repercussions for the troubled Thorp reprocessing plant, although Thorp is also involved in generating Mox fuel, which is made from plutonium and uranium.Tony Fountain, chief executive of the NDA, told workers on Wednesday morning: "The reason for this [closure] is directly related to the tragic events in Japan following the tsunami and its ongoing impact on the power markets. As a consequence we no longer have a customer for this facility, or funding."

Sellafield could become a deadly weapon, capable of contaminating Irish people with cancer, warns Aine O'ConnorIN THE Eighties the world worried about the possibility of nuclear war. The deployment of nuclear weapons was at its height, relations between the superpowers at their worst. All things nuclear posed a threat and as a by-product, Sellafield became a household name.

We learned that the Irish Sea was the most radioactive in the world, that mutated fish had been found in it, that there were serious health concerns in Co Louth and that an accident at Sellafield would have serious repercussions for our health.

The Norwegian Government is also considering legal action since radioactive pollution from the plant has been found along the Norwegian coastline as far north as the Arctic.

The manufacture of mixed oxide (MOX) nuclear fuel at Sellafield is to stop "at the earliest practical opportunity" to reduce the financial risks to British taxpayers from events in Japan.  

The closure comes as a result of the Fukushima accident, which dramatically increased uncertainty for the ten Japanese utilities that had placed contracts for supplies of MOX fuel. This is made by combining uranium with plutonium recovered by reprocessing used nuclear fuel. The Nuclear Decommissioning Authority (NDA), which owns all the UK state's nuclear assets, said it reviewed the risk profile for operation of Sellafield MOX Plant (SMP) and "concluded that in order to ensure that the UK taxpayer does not carry a future financial burden from SMP that the only reasonable course of action is to close SMP at the earliest practical opportunity."

Separately Areva last week announced the cancellation of orders for uranium and nuclear fuel amounting to €191 million ($273 million) as a result of the shutdown of reactors in Japan and Germany.The NDA's move to close SMP will be a grave disappointment for the plant's 600 workers, who had celebrated success in raising performance to commercially acceptable levels. Despite being designed to produce 120 tonnes of fuel per year, it never operated properly and was downrated to just 40 tonnes per year. In its nine years of operation to 2010 it produced only 15 tonnes of fuel.

The plan envisages the construction of twin nuclear "fast reactors" at Sellafield that can dispose of the plutonium directly as fuel to generate electricity while ridding the country of a nuclear-waste headache that has dogged governments for half a century.

Britain's Nuclear Decommissioning Authority (NDA), which is in overall charge of Sellafield, requested the study last year in a remarkable U-turn in its stated policy of dealing with the 112 tonnes of civil plutonium that has accumulated as a result of the reprocessing of spent nuclear fuel.

The American company behind the proposal, GE Hitachi Nuclear Energy, still has a long way to go to convince experts that it can deliver reactors that can work as promised, as well as being delivered on time and to budget.

While the 2011 earthquake and worries surrounding Fukushima have brought the threat of radioactivity back into the public consciousness, many people still don't realize that radioactive contamination is a worldwide danger. Radionuclides are in the top six toxic threats as listed in the 2010 report by The Blacksmith Institute, an NGO dedicated to tackling pollution. You might be surprised by the locations of some of the world’s most radioactive places — and thus the number of people living in fear of the effects radiation could have on them and their children.

10. Hanford, USA

The Hanford Site, in Washington, was an integral part of the US atomic bomb project, manufacturing plutonium for the first nuclear bomb and "Fat Man," used at Nagasaki. As the Cold War waged on, it ramped up production, supplying plutonium for most of America's 60,000 nuclear weapons. Although decommissioned, it still holds two thirds of the volume of the country’s high-level radioactive waste — about 53 million gallons of liquid waste, 25 million cubic feet of solid waste and 200 square miles of contaminated groundwater underneath the area, making it the most contaminated site in the US. The environmental devastation of this area makes it clear that the threat of radioactivity is not simply something that will arrive in a missile attack, but could be lurking in the heart of your own country.

THE nuclear company Sellafield Ltd was today fined £75,000 after pleading guilty to breaches of health and safety law after two contractors inhaled radioactive contamination.

UK authorities should ensure the Thorp plant at Sellafield remains permanently closed down, it was claimed today as the nuclear operators were fined €743,000 following a radioactive leak.Around 83,000 litres of acid containing 20 tonnes of uranium and 160kg of plutonium escaped from a broken pipe into a sealed concrete holding site at the Thorp plant in west Cumbria in April 2005.

Radioactive waste from Sellafield has been found in Scottish farmed salmon sold in major British supermarkets. Tests commissioned by Greenpeace revealed traces of radioactive waste in packets of fresh and smoked salmon. The tests, conducted independently by Southampton University's oceanography centre, found low levels Technetium-99 (Tc-99) in farmed Scottish salmon sold at Sainsbury's, Tesco, Asda, Safeway, Waitrose and Marks & Spencer. Tc-99 is a byproduct of Magnox fuel reprocessing. Dr David Santillo, a scientist at Greenpeace's research laboratories at Exeter University, said: "Tc-99 should not be there at all. It is inexplicable yet significant. Scottish salmon is marketed as something that comes from a pristine environment."

The huge £1.8bn plant at Sellafield imports spent nuclear fuel from around the world and returns it to countries as new reactor fuel. But a series of catastrophic technical failures with associated equipment means Thorp could be mothballed at a cost of millions of pounds.

Thorp is contracted to reprocess more than 700 tonnes of spent nuclear fuel, most of it for Germany, which could sue if Sella­field does not return it on time.

The latest technical hitches are embarrassing for the government, which hopes to use Sellafield as the centre of a huge British nuclear industry, with the Cumbrian coast expected to host a new enormous waste depository as well as possibly two new nuclear power stations.

The impacts on the ocean of releases of radionuclides from the Fukushima Dai-ichi nuclear power plants remain unclear. However, information has been made public regarding the concentrations of radioactive isotopes of iodine and cesium in ocean water near the discharge point. These data allow us to draw some basic conclusions about the relative levels of radionuclides released which can be compared to prior ocean studies and be used to address dose consequences as discussed by Garnier-Laplace et al. in this journal.(1) The data show peak ocean discharges in early April, one month after the earthquake and a factor of 1000 decrease in the month following. Interestingly, the concentrations through the end of July remain higher than expected implying continued releases from the reactors or other contaminated sources, such as groundwater or coastal sediments. By July, levels of 137Cs are still more than 10 000 times higher than levels measured in 2010 in the coastal waters off Japan. Although some radionuclides are significantly elevated, dose calculations suggest minimal impact on marine biota or humans due to direct exposure in surrounding ocean waters, though considerations for biological uptake and consumption of seafood are discussed and further study is warranted.

there was no large explosive release of core reactor material, so most of the isotopes reported to have spread thus far via atmospheric fallout are primarily the radioactive gases plus fission products such as cesium, which are volatilized at the high temperatures in the reactor core, or during explosions and fires. However, some nonvolatile activation products and fuel rod materials may have been released when the corrosive brines and acidic waters used to cool the reactors interacted with the ruptured fuel rods, carrying radioactive materials into the ground and ocean. The full magnitude of the release has not been well documented, nor is there data on many of the possible isotopes released, but we do have significant information on the concentration of several isotopes of Cs and I in the ocean near the release point which have been publically available since shortly after the accident started.

We present a comparison of selected data made publicly available from a Japanese company and agencies and compare these to prior published radionuclide concentrations in the oceans. The primary sources included TEPCO (Tokyo Electric Power Company), which reported data in regular press releases(3) and are compiled here (Supporting Information Table S1). These TEPCO data were obtained by initially sampling 500 mL surface ocean water from shore and direct counting on high-purity germanium gamma detectors for 15 min at laboratories at the Fukushima Dai-ni NPPs. They reported initially results for 131I (t1/2 = 8.02 days), 134Cs (t1/2 = 2.065 years) and 137Cs (t1/2 = 30.07 years). Data from MEXT (Ministry of Education, Culture, Sports, Science and Technology—Japan) were also released on a public Web site(4) and are based on similar direct counting methods. In general MEXT data were obtained by sampling 2000 mL seawater and direct counting on high-purity germanium gamma detectors for 1 h in a 2 L Marinelli beaker at laboratories in the Japan Atomic Energy Agency. The detection limit of 137Cs measurements are about 20 000 Bq m–3 for TEPCO data and 10 000 Bq m–3 for MEXT data, respectively. These measurements were conducted based on a guideline described by MEXT.(5) Both sources are considered reliable given the common activity ratios and prior studies and expertise evident by several Japanese groups involved in making these measurements. The purpose of these early monitoring activities was out of concern for immediate health effects, and thus were often reported relative to statutory limits adopted by Japanese authorities, and thus not in concentration units (reported as scaling factors above “normal”). Here we convert values from both sources to radionuclide activity units common to prior ocean studies of fallout in the ocean (Bq m–3) for ease of comparison to previously published data.

This is an estimation of Asahi newspaper so it is not trustworthy enough. However, it would be some kind milestone to judge something. One of the propaganda mass media – Asahi newspaper – yet tried to estimate the total amount of leakage of strontium. They are based on the Tepco’s press release. They assumed it only leaked from reactor 2 in April and from reactor 3 in May for some reason. Also, they ignored the strontium from the fall-out as well. However, it turned out to be as bad as the worst historical sea contamination of Sellafield in 1970′s, which was about 500 trillion Bq. Probably this “500 trillion Bq of leakage” is a false data as well. Even Asahi newspaper warns about the biological concentration in the sea. They requires radiation measuring of the sea to be conducted as soon as possible.