Sentences with phrase «of hydrogen explosions»

The U.S. Institute of Nuclear Power Operations (INPO), in a report last November, related desperate actions by TEPCO crews to contain the reactor accident in the critical first week of the crisis, as they tried to operate crucial valves and instruments with truck batteries; hauled massive emergency power cables over flooded passageways where manhole covers had been dislodged; and faced a series of hydrogen explosions and sudden spikes in radiation.

Not exact matches

The tank containing hydrogen fluoride was not damaged by the explosion or fire and none of the chemical leaked, company officials said.

Saying the chemical is too much of a risk, the mayors of Duluth and Superior, Wis., are calling on Husky Energy to stop using hydrogen fluoride at the company's Superior refinery following last week's explosion and fire.

While the IAEA could not determine if the explosion came from a hydrogen bomb as North Korea claimed, Amano said the bigger yield of this latest test means «it is safe to assume North Korea is making significant progress.»

This allowed the international team to determine that the explosion was a Type IIb supernova: the explosion of a massive star that had previously lost most of its hydrogen envelope, a species of exploding star first observationally identified by Filippenko in 1987.

Because all elements in the universe heavier than hydrogen, helium, and lithium have been forged by nuclear fusion in the cores of stars and then scattered into space by supernova explosions, the find indicates that the galaxy, at the age we're now observing it, was old enough for at least one generation of stars to have formed, lived, and died.

In fact, throughout the first week of the Fukushima crisis, emergency workers tried to figure out a way to open up a larger hole in the Unit 2 reactor building, which had not suffered an explosion, to allow better access to inject cooling water without creating the kind of spark that might cause another hydrogen blast.

The United States followed in January 1958 with the 31 - pound satellite Explorer I. Even as the nascent U.S. space program focused on pint - size payloads, however, a research team at an obscure division of the General Dynamics Corporation was secretly drawing up plans for a monstrous 4,000 - ton spaceship that would be powered by the sequential explosions of thousands of hydrogen bombs and would ferry hundreds of astronauts at a time across the solar system.

By March 14, hydrogen gas explosions captured live on television had blown out the walls and roofs of the Unit 1 and 3 reactor buildings.

Typical hydrogen storage materials are limited by factors like water sensitivity, risk of explosion, difficulty of control of hydrogen - generation.

Metals (elements heavier than hydrogen and helium) are created in the interiors of stars as they evolve and then released into surrounding gas through supernova explosions or stellar winds (often referred to as chemical evolution).

When more hydrogen settles onto the star and heaps up to a critical density, another explosion occurs, releasing another burst of X-rays, and so on.

The sun's core is literally a nonstop hydrogen - bomb explosion that keeps the solar furnace revved up to tens of millions of degrees.

Energetic eruptions leading to a peculiar hydrogen - rich explosion of a massive star.

Radio waves emitted by cool hydrogen (third inset) trace a pool of gas left behind by the explosion and merger.

Nor was there any report that we know of about the hydrogen tank explosion that killed postdoc Meng Xiangjian at Tsinghua University in Beijing in December.

The terrifying meltdowns and hydrogen explosions at the Fukushima Daiichi nuclear power station in the days following 11 March 2011 made the importance of backup electricity generators painfully clear.

Units 1 and 3 have experienced explosions that destroyed exterior walls, apparently from buildups of hydrogen gas produced by the zirconium in the fuel rods reacting with coolant water at extremely high temperatures — but the interior containment vessels there thus far seem to be intact.

Hydrogen has proven notoriously difficult to store in sufficient quantities without placing it under enormous pressure, something that greatly adds to the weight of a vehicle and adds a serious explosion hazard.

This type of explosion occurs in massive stars that have a thick layer of hydrogen.

Elements heavier than hydrogen and helium are forged in the nuclear furnaces of stars or during supernova explosions.

Leaks of hydrogen from damaged reactors at units Nos. 1 and 3 is blamed for explosions at the tops of the outer, secondary containment structures, and an explosion within the No. 2 primary containment structure.

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

Type Ic supernovae, the explosions after the core collapse of massive stars that have previously lost their hydrogen and helium envelopes, are particularly interesting because of their link with long - duration gamma ray bursts.

NIF is designed to achieve nuclear fusion by crushing capsules of hydrogen fuel with immensely energetic lasers, both for energy research and to help nuclear weapons designers simulate explosions.

But the greatest damage to the complex, and the greatest release of radiation, may have been caused by explosions of hydrogen gas that built up inside some of the reactors.

The buildings housing reactors Nos. 1, 2, 3 and 4 have all suffered damage from hydrogen explosions, caused by the high - temperature, high - speed interaction of fuel rods and steam.

With the roofs off and other paths for hydrogen to escape — hydrogen is the only element capable of escaping Earth's gravity — the chance of suffering another such explosion has been diminished, except at reactors No. 5 and 6.

Supernova explosions blew these heavier elements into interstellar space, where they mixed with clouds of primordial hydrogen and helium and were recycled into subsequent generations of stars.

Made entirely of hydrogen and helium, these stars produced heavier elements in the process of consuming their fuel and ultimately died in explosions that spewed out the newly forged elements into interstellar space.

Although the Cambrian explosion generated a large number of new phyla of Earth - type life, it actually crashed in a mass extinction not long after it began when oxygen levels fell and hydrogen sulphide levels rose again so that biodiversity at the family, genus, and species levels was decreasing around 515 million years ago (Gill et al, 2011; and Michael Marshall, New Scientist, January 5, 2011).

When a star less than eight times the mass of our Sun runs out of the supply of hydrogen fueling the thermonuclear reaction raging in its stellar core, it may transform into a red giant instead of ending its life in a dramatic supernova explosion.

A hydrogen explosion like that of the Hindenburg could occur on Earth, but not on one of the outer planets.

iPTF14hls expelled 50 times the mass of the sun in hydrogen in the explosion in 2014.

The theory predicts that such a star should blow off all of its hydrogen in the first explosion.

Second generation stars do not just burn hydrogen, they also burn heavier elements, like helium and metals (elements heavier than hydrogen and helium), and were formed from supernova explosions (the debris of exploded population II stars).

The danger of explosion derives not from the ignition of hydrogen but of the 2:1 mixture of hydrogen and oxygen.

The risk of explosion is lower than in older battery designs due to less venting of hydrogen gas in current designs.

The National Highway Traffic Safety Administration said that failure of the part, called a transducer, could cause a sudden hydrogen leak and an explosion.

A future hydrogen economy could use the gas as an energy carrier As this method doesn't produce oxygen which needs to be kept separate from hydrogen, safety from explosion of the two gases is much less of a problem with electricity in the national grids carried by ageing cables, it would be useful to replace them by passing the hydrogen along gas pipes used currently for natural methane gas.

The explosion would have been the equivalent of two million hydrogen bombs.

Although radiation leakage has been reported, the reactor core containment is said still to be intact, But if the cooling operation is not successful then there is a risk that, aside from the (hopefully low) possibility of a explosion as at Chernobyl, or a hydrogen explosion (as was feared at one time at Three Mile Island in the USA), melting fuel could burn through the core and the floor of the reactor building and enter the soil, a risk that would be heightened if the floor structure was cracked by the earthquake.

In a matter of days, venting of hydrogen from overpressurized reactor vessels led to large explosions at reactors 1, 2, and 3, which experienced full meltdown.

This can have negative safety consequences, including a greater probability of damage from hydrogen explosions.

In fact, certain of TEPCO's actions in the aftermath of the explosions have been confused and, some might opine, lacking discipline of purpose to the extent that expedient decisions have been made without proper forethought and judiciousness to avoid knock - on consequences: for example, the injection of seawater may have resulted in salt deposits sufficient to foul cooling flows in the lower regions of the RPV [reactor pressure vessel]; the liberation of hydrogen from seawater is more rampant than from freshwater and radiolysis of oxygen from the cooling water could provide stoichiometric conditions and ignition with hydrogen in the absence of air in the containments; and the latest and most recent announcement to deploy a nitrogen purge to the Unit 1 reactor seems yet another ill - explained and unjustified desperate measure».

On Sept. 15, 2011, N.C. labor officials fined Progress Energy $ 31,500 for safety violations that contributed to the death of Corey Rogers, 24, who was killed March 15, 2011 by a hydrogen explosion while performing maintenance at the Sutton coal - fired plant near Wilmington, N.C. [50]