Sentences with phrase «of uranium fuel»

The costs are too high, they take too long to deploy, and I am VERY concerned that we are FAR more dependent on foreign sources of uranium fuel than we are for oil.

I * am * concerned about the astronomical cost, the decades long construction cycles, the massive cost overruns, the near 100 % dependence on government subsidies, the absolutely unacceptable practice of Toshiba and Areva declaring cost projections «proprietary», and in the United States, our near total dependence on foreign sources of uranium fuel.

American power plants are using over 40 million pounds of uranium fuel each year.

Nathalie Wall, assistant professor of chemistry, and Larissa Gribat, chemistry doctoral candidate, are investigating ways to contain technetium (Tc), a radioactive element produced during the burnup of uranium fuel.

The contaminated sites, on floodplains in the upper Colorado River basin, operated from the 1940s to the 1970s to produce «yellowcake,» a precursor of uranium fuel used in nuclear power plants and weapons.

M.I.T. nuclear engineer Charles Forsberg, another co-chair of the report, noted that a typical light - water reactor in the U.S. needs 200 metric tons of mined uranium resulting in 20 metric tons of uranium fuel per year.

And by 2070, Storm van Leeuwen found, the amount of energy it takes to mine, mill, enrich and fabricate one metric ton of uranium fuel may be larger than 160 terajoules — the amount of energy one can generate from it.

Not exact matches

However, when asked to comment, one CEO said Canada is in a strong position because Candu reactors use heavy water instead of boiled or pressurized water, which allows the reactor to run on natural uranium instead of enriched uranium fuel.

So Energy Fuels has a little bit more leverage to the uranium price than some of the other companies we cover.

When a uranium price recovery happens, Energy Fuels has a significant number of assets that could be brought into production, some former producers, some larger assets with large capital budgets.

Exelon Corp., owner of Nine Mile Point, estimated it would cost about $ 125 million to resupply FitzPatrick with uranium fuel rods next fall, which would allow the plant to continue operating two years beyond when plant owner Entergy Corp. plans to shut it down, the administration official said.

Reports suggest it could see the international community provide Tehran with a foreign supply of atomic fuel, so it need not enrich uranium itself, with a package of sanctions such as visa bans if it did not comply.

Instead of running on solid uranium — the industry's mainstay for more than 50 years — it would rely on liquid fuel suffused with thorium, which is three times as abundant as uranium.

One initiative that is slow off the mark is the transformation of the underground Fordow Fuel Enrichment Plant, which housed about 2700 centrifuges for enriching uranium, into an international physics center.

This concentrated atomic assault allows the reactor to extract 100 times as much energy from uranium fuel as do current thermal reactors, which use less than 1 percent of the fuel's potential energy.

The world's ample supply of uranium could fuel a much larger fleet of reactors than exists today throughout their 40 - to 50 - year life span.

Waste from the front end of the nuclear fuel cycle is usually alpha emitting waste from the extraction of uranium.

The back end of the nuclear fuel cycle, mostly spent fuel rods, often contains fission products that emit beta and gamma radiation, and may contain actinides that emit alpha particles, such as uranium - 234, neptunium - 237, plutonium - 238 and americium - 241, and even sometimes some neutron emitters such as Cf.

Most of Nangonya's training covered the subjects that might be expected: the ins and outs of the nuclear fuel cycle, how to verify that each and every reported gram of plutonium and uranium are where they are supposed to be, and how to spot signs of illicit activity.

The Bulletin acknowledges that the increased use of carbon - free nuclear energy could help mitigate global warming brought on by fossil fuels and greenhouse gas emissions but concludes that the possibility of misusing enriched uranium and separated plutonium to create bombs is a «terrible trade - off» for trying to control climate change.

The article, published recently in Open Chemistry may lead to the development of a process to remove uranium from wastewater at the front - end of the nuclear fuel cycle, or even extracting natural uranium from sea water.

The agency says the Hanford site in southeastern Washington, which manufactured more than 20 million pieces of uranium metal fuel for nine nuclear reactors near the Columbia River, is its biggest cleanup challenge.

Most nuclear reactors use uranium fuel that has been «enriched» in uranium 235, an isotope of uranium that fissions readily.

Nikolai Yegorov, Russia's deputy minister for atomic power, told deputies of the Russian parliament that the country imports between 300 and 400 tonnes a year of uranium reclaimed from reprocessed French fuel.

Enriched uranium is manufactured into fuel rods that are encased in metal cladding made of alloys such as zirconium.

Even though the plants begin with fuel that has had its uranium 235 content enriched, most of that easily fissioned uranium is gone after about three years.

Uranium makes up the bulk of the spent nuclear fuel (around 94 percent); this is unfissioned uranium that has lost most of its uranium 235 and resembles natural uranium (which is just 0.71 percent fissile uraniuUranium makes up the bulk of the spent nuclear fuel (around 94 percent); this is unfissioned uranium that has lost most of its uranium 235 and resembles natural uranium (which is just 0.71 percent fissile uraniuuranium that has lost most of its uranium 235 and resembles natural uranium (which is just 0.71 percent fissile uraniuuranium 235 and resembles natural uranium (which is just 0.71 percent fissile uraniuuranium (which is just 0.71 percent fissile uraniumuranium 235).

The 3.7 - meter - long nuclear fuel used at Fukushima is composed of uranium oxide pellets encased in a zirconium cladding.

In particular, a relatively new form of nuclear technology could overcome the principal drawbacks of current methods — namely, worries about reactor accidents, the potential for diversion of nuclear fuel into highly destructive weapons, the management of dangerous, long - lived radioactive waste, and the depletion of global reserves of economically available uranium.

Because the world's uranium supply is finite and the continued growth in the numbers of thermal reactors could exhaust the available low - cost uranium reserves in a few decades, it makes little sense to discard this spent fuel or the «tailings» left over from the enrichment process.

During the Cold War, private companies such as Tronox's former parent company, Kerr - McGee Corp., operated uranium mines under U.S. government contracts, removing four million tons of ore that went into making nuclear weapons and fuel.

The third stream, amounting to about 92 percent of the spent thermalreactor fuel, would contain the bulk of the uranium, now in a depleted state.

In addition, only about one tenth of the mined uranium ore is converted into fuel in the enrichment process (during which the concentration of uranium 235 is increased considerably), so less than a hundredth of the ore's total energy content is used to generate power in today's plants.

After all, the spent fuel pools that may have been exposed by the power plant explosions contain more than 200 metric tons of used uranium fuel rods that have been cooling for weeks, months or even years — and smoke or steam continues to billow from the exposed spent fuel pool of reactor No. 3.

If the fuel rods are no longer being cooled — as has happened at all three reactors at the Fukushima Daiichi power plant operating at the time of the earthquake — then the zirconium cladding will swell and crack, releasing the uranium fuel pellets and fission byproducts, such as radioactive cesium and iodine, among others.

After about three years of service, when technicians typically remove used fuel from one of today's reactors because of radiation - related degradation and the depletion of the uranium 235, plutonium is contributing more than half the power the plant generates.

The US government would also have to subsidise the manufacture of MOX fuel so that it would cost no more than conventional uranium fuel, says Holdren.

Earl Lane / AAAS There is enough highly enriched uranium on hand to fuel non-weapon uses of the fissile material for a century, a nonproliferation...

The fuel rods in most cases consist of uranium dioxide pellets encased in zirconium alloy tubes or cladding.

The problem of spent fuel storage Nuclear reactor operators must store spent fuel removed from reactor cores for several years at least, in large pools at reactor sites until the remaining heat from the uranium fuel cools sufficiently.

In addition to neutrons, the fission reaction of nuclear fuels like plutonium or uranium releases antineutrinos.

The U.S. should aggressively explore the offer made by Iran's president Mahmoud Ah madinejad last fall to end all enrichment beyond low - enriched uranium in exchange for the purchase of fuel for its Tehran Research Reactor.

In the 1980s the antineutrino spectra of three main fuel isotopes, uranium 235, plutonium 239 and plutonium 241, were determined.

Reactors around the world require their fuel to hold anywhere from 3 to 5 percent U235, or 30 to 50 atoms of the fissile isotope per 1,000 atoms of uranium.

In addition, nuclear engineers have uncovered ways to coax more heat out of fissile uranium fuel before it inevitably fizzles out.

That resurgence will require full utilization of existing and yet undiscovered stores of the uranium ore that fuels such power plants.

The concentration of this isotope must therefore be boosted in natural uranium before it can function as nuclear power plant fuel.

That is also enough to meet almost half the fuel needs of the 104 U.S. reactors, once various plants located throughout the country shape this uranium into half - inch -(1.27 - centimeter --RRB- diameter black pellets and then form them into rods by coating the pellets with zirconium cladding.

Meanwhile, Japan has struggled to bring its Rokkasho reprocessing plant online, even with the help of Areva, and currently relies on France and the U.K. to recycle its used uranium fuel rods.

Nuclear fuel Areva has also signed a contract to supply Chinese nuclear operating companies, including China Guangdong Nuclear Power Group (CGNPC) and CNNC, with uranium fuel — 20,000 tons of the fissile material between now and 2020 for $ 3.5 billion.