Sentences with phrase «of radioactive releases»

His MSc thesis (1987) dealt with the description and application of a system for calculating radiation doses due to long range transport of radioactive releases and his Licentiates's thesis (1998) studied the effective choice of NOx - emission control measures.

In the wake of radioactive releases from Japan's Fukushima Daiichi nuclear plant, critics are saying a California nuclear plant's susceptibility to earthquakes and tsunamis could affect its chances of renewing its operating license.

The NRC nonetheless permits its use because «the Mark I can survive long enough to allow for actions that keep the public safe in the event of a radioactive release,» Burnell says.

Not exact matches

On April 26, 1986, a radioactive release many times as large as the that of the Hiroshima bomb occurred at the Chernobyl nuclear power plant in the Soviet Union.

And yet, exposure occurs constantly, since radiation is released regularly from Indian Point in the form of liquid, gaseous, and solid radioactive wastes.

As a matter of regular operation, radiation is released from Indian Point in the form of liquid, gaseous, and solid radioactive wastes.

The amount of radioactive tritium leaking from the Indian Point nuclear power plant is growing, according to tests released today.

«This is not the first such release of radioactive water at Indian Point, nor is this the first time that Indian Point has experienced significant failure in its operation and maintenance,» Cuomo said in a statement.

The release of radioactive contaminants from the Fukushima Daiichi nuclear power plant remains an unprecedented event for the people of Japan and the Pacific Ocean.

In 1957, an explosion occurred at a plutonium production plant, releasing about 80 tonnes of radioactive material.

News of multiple core meltdowns and radiation releases spurred governments to drop nuke projects like radioactive hot potatoes.

«It was nowhere near as complex of a release as Chernobyl, which was everything from the core of the reactor,» says Peter Caracappa, a radiation safety officer and clinical assistant professor of nuclear engineering at Rensselaer Polytechnic Institute in Troy, N.Y. «This was a slow release,» he adds, and it was limited to a few radioactive materials, including iodine 131, which has a half - life of just eight days and therefore does not lead to long - term contamination.

«The WHO report shamelessly downplays the impact of early radioactive releases from the Fukushima disaster on people inside the 20 km evacuation zone who were not able to leave the area quickly,» says Rianne Teule, a nuclear expert at Greenpeace International.

«We have to take care, because there are huge amounts of materials around the Fukushima nuclear plant,» he says, concerned that radioactive materials in the debris could be released into the atmosphere all over again if ignited.

The pattern of prevailing winds during the accident meant that most of the radioactive materials released from the plant were blown out to sea.

Gummer approved limits for the amounts of radioactive substances that can be released from the Sellafield complex with a few minor changes.

The TEPCO operators of the stricken nuclear power plant — a minimal staff of 50 as all non-essential personnel have been evacuated — now face a balance between venting the steam building up in the reactor (since the main danger for a widespread release of radioactive material is steam bursting the thick steel container holding the reactor) and keeping any radioactive materials inside the power plant itself.

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.

The NRC analysis found that a fire in a spent - fuel pool at an average nuclear reactor site would cause $ 125 billion in damages, while expedited transfer of spent fuel to dry casks could reduce radioactive releases from pool fires by 99 percent.

The fire in the spent fuel store of reactor unit 4 has probably released the worst of the radioactive materials so far.

This is potentially more worrying than the venting of contaminated gases from reactors 1, 2 and 3, as the fire released radioactive material straight into the atmosphere.

«The result could be a runaway oxidation reaction» and the release of radioactive fission gases» and some of the radioactive fuel material.

Densely packed pools are highly vulnerable to catching fire and releasing huge amounts of radioactive material into the atmosphere.

There's also a peculiar glow in the center, believed to be energy released by a radioactive isotope of titanium created in the first second of the explosion.

This led to core meltdowns at three of the six reactors at the facility, hydrogen explosions, and a release of radioactive material.

Highly packed spent fuel pools at the Japanese facility have caught fire, lost coolant, and released unknown quantities of radioactive material, underscoring the need to remove as much fuel from overcrowded pools as possible.

The pools — water - filled basins that store and cool used radioactive fuel rods — are so densely packed with nuclear waste that a fire could release enough radioactive material to contaminate an area twice the size of New Jersey.

A report to Congress in 2006 by a National Research Council panel investigating terrorist threats to spent fuel storage concluded that «under some conditions,» if a pool were partially or completely drained, that «could lead to a propagating zirconium cladding fire and the release of large quantities of radioactive materials to the environment.»

Cromolyn inhibited histamine release from mast cells that was induced by a classic secretagogue and correspondingly increased incorporation of radioactive phosphate into a 78,000 - dalton protein.

The machines handle the decaying element's radiation better than human miners and can tolerate the radon gas released by the ore; early Navajo miners of uranium in the U.S. — and their families exposed to residual radioactive dust and debris as well as contaminated water — developed lung cancer and other ailments by the 1970s and 1980s.

The organisation set up to verify the Comprehensive Nuclear - Test - Ban Treaty (CTBT) has a global network of air samplers that monitor and trace the origin of around a dozen radionuclides, the radioactive elements released by atomic bomb blasts — and nuclear accidents.

This raised the original rating from level 5 and puts the Fukushima Daiichi disaster technically in the same category as Chernobyl, although the quantity of discharged radioactive materials in Japan so far is about 10 percent of what was released by the Chernobyl reactor explosion, considered history's worst nuclear accident.

The difference between this accident and Chernobyl, they say, is that at Chernobyl a huge fire released large amounts of many radioactive materials, including fuel particles, in smoke.

Marine scientists have calculated that, based on all the radioactive particles released (or leaking) from Fukushima, a dose due to this most recent nuclear accident would add up to a total of roughly one microsievert (a unit of radiation exposure) of extra radiation — roughly one tenth the average daily dose most Americans experience, one fortieth the amount from a cross — North America flight and one one - hundredth the exposure from a dental x-ray.

With more than 17 million Americans now living within one mile of an oil and gas well, there is concern about the possible contamination of surface and groundwater by trace metals, radioactive isotopes and other inorganic compounds released in these areas, they point out.

Wheeler likes to use the example of a high - energy particle released by a radioactive element like radium in Earth's crust.

As Formaggio explains it, when a radioactive atom such as tritium decays, it turns into an isotope of helium and, in the process, also releases an electron and a neutrino.

To meet the ’10 000 year criterion», set by the DOE, the repository must not release «significant» amounts of its radioactive content into the environment during that period, no matter what changes occur in the local climate, geology or water table.

Personnel at the Fukushima Daiichi plant responded to the accident with courage and resilience, and their actions likely reduced its severity and the magnitude of offsite radioactive material releases, the committee said.

«The study raises an important issue, how climate change can result in unanticipated release into the environment of toxic and radioactive wastes that were optimistically presumed at the time to be stably isolated,» Daniel Hirsch, director of the Program on Environmental and Nuclear Policy at the University of California, Santa Cruz, said in an email.

That plane was loaded with four hydrogen bombs when it went down on the sea ice near the Thule Air Base — 200 kilometers west of Camp Century — releasing radioactive elements including uranium and plutonium.

Further complicating this option, there was an accidental release of radioactive material from WIPP in February.

The method, which has taken Spalding more than a decade to develop, hinges on a massive pulse of radioactive carbon - 14 isotopes released by nuclear explosions in the 1950s and»60s, which doubled the amount of carbon - 14 in the atmosphere.

To illustrate this effect, Schrödinger imagined putting a cat in a box along with a device that would release poison to kill it, depending on the random decay of a radioactive atom.

The first system — radioisotope thermoelectric generators, or RTGs — taps heat released from the natural decay of a radioactive element, such as plutonium.

Besides posing a serious health risk to those in PF - 4, glove box releases of radioactive material each cost the government $ 23,000 to clean up, on average, the Los Alamos study said.

NuScale's design incorporates seven layers of defense to prevent the release of radiation or radioactive contamination into the environment.

Thus, WIPP's mission has been to demonstrate whether the federal government and its contractors, at the cost of unknown billions of dollars can: (1) safely operate WIPP to meet the «start clean, stay clean» standard; (2) safely transport plutonium - contaminated waste through more than 20 states without serious accidents or release of radioactive or hazardous contaminants; (3) meet commitments to clean up transuranic waste at about 20 DOE nuclear weapons sites; and (4) safely close, decontaminate, and decommission the WIPP site, beginning in 2030 or sooner.

Such electrical equipment and systems are classed as essential to emergency reactor shutdown, containment isolation, reactor core cooling, and containment and reactor heat removal, or otherwise are essential in preventing a significant release of radioactive material to the environment.

A very severe transportation accident or successful terrorist attack in an urban area could release radioactive materials to the environment, causing hundreds of latent cancer fatalities, and costing hundreds of millions, or even billions, of dollars for cleanup and compensation.