Sentences with phrase «nuclear chain»

This led to the discovery of nuclear chain reactions and took physics into the unprecedented territories of nuclear power and nuclear weapons.

A student of Enrico Fermi, Fano played a central role in the early development of modern atomic physics, carrying out the first controlled nuclear chain reaction in 1942.

Forty - five years after Humanae Vitae, it now seems clear that the invention of the oral contraceptive pill (to adopt one reference point for the broader contraceptive revolution) was one of the three achievements of 20th - century science with truly world - historical impact, the other two being the creation of the self - sustaining nuclear chain reaction and the unraveling of the DNA double helix.

So they drafted a second set of letters in drafts to the President of the United States, warning him about nuclear chain reactions and their military potential.

When that same nuclear chain reaction is channelled into electricity generation, a single gram of uranium can provide 1 kilowatt of power for a year.

«It may become possible to set up nuclear chain reactions,» the letter told President Roosevelt.

«Closed cycle» means quarantining the entire nuclear chain — from uranium mining to spent fuel burial — at a single, isolated, secure, safeguarded place.

Photograph, titled Site of the First Self - sustaining Controlled Nuclear Chain Reaction December 2, 1942; Chicago, Illinois, by James Welling.

In December 1942 Enrico Fermi achieved the first self - sustaining nuclear chain reaction, harnessing the process that would be used to lay waste to the Japanese cities of Nagasaki and Hiroshima in August 1945.

The anniversary of the first controlled nuclear chain reaction marks an achievement of immigrants who served America in World War II.

After Szilárd fled the Nazis, he made his way to England and then New York, where he worked at Columbia University on ways to create a nuclear chain reaction, an idea he had conceived while waiting at a stoplight in London a few years earlier.

Thus began the quest to experimentally prove that a nuclear chain reaction was possible — and 75 years ago, researchers at the University of Chicago succeeded, opening the door to what would become the nuclear era.

Sometimes, a few seconds after the fission occurs in a nuclear chain reaction, additional neutrons are released.

They called this 20x6x25 - foot setup Chicago Pile Number One, or CP - 1 for short — and it was here they obtained world's the first controlled nuclear chain reaction on December 2, 1942.

Figuring out how to create and control the nuclear chain reaction was the foundation for the 448 nuclear reactors producing energy worldwide today.

The science has come a long way since Szilard's vision and Fermi's proof of a controlled nuclear chain reaction.

As a result, the nuclear chain reaction in their Chicago experiment could have spiraled out of control, with potentially devastating results.

These reactors have the intriguing feature that the water used to cool the core and run the generating turbine is also essential to maintaining a nuclear chain reaction.

And though it would irk Jules Verne no end, there's also the fact that Leo Szilard, the man who first theorized about a nuclear chain reaction, said he was directly inspired by the work of H. G. Wells, in whose book The World Set Free, the term «atomic bomb,» as well as the vague mechanics of same, were first published.

In the movie, a «chain reaction» occurred, but it was difficult to determine if this was a nuclear chain reaction or just a big hydrogen explosion.

It is the intellectual equivalent of a nuclear chain reaction, which might very well be the most powerful force most of us will ever experience.

Some of these emitted neutrons then strike other nearby fissile atoms, causing them to break apart, thus propagating a nuclear chain reaction.

For one thing, there's a chance that enough plutonium could congregate to trigger a nuclear chain reaction, or criticality — the self - sustaining cascade of atomic fission that releases massive amounts of energy.

By SPENCER WEART The team that started up the first nuclear chain reaction, 50 years ago, was as nervous as if it was supervising the birth of Frankenstein's monster.

On 2 December 1942, some of the world's leading scientists crowded into a disused squash court to stage the first controlled nuclear chain reaction

The reactor in an ADS contains too little fissile material in its core to sustain a nuclear chain reaction.

Like a story by Victor Hugo as told to Neil Simon, the events leading up to the first controlled nuclear chain reaction involved accidental encounters among larger - than - life figures, especially two who did not exactly get along — but had to

In certain circumstances it might be possible to set up a nuclear chain reaction, liberate energy on an industrial scale, and construct atomic bombs.»

But the basic fact seems to remain: Leo Szilard thought up the nuclear chain reaction over five years before fission was discovered.

«As the light changed to green and I crossed the street,» Szilard recalls, «it... suddenly occurred to me that if we could find an element which is split by neutrons and which would emit two neutrons when it absorbs one neutron, such an element, if assembled in sufficiently large mass, could sustain a nuclear chain reaction.

«Subsequently, because of his conviction that if a nuclear chain reaction could be made to work it might be used as an instrument of war to set up violent explosions, Szilard separated that part of the application which related to the nuclear chain reaction and incorporated it in modified form into a later filed application, No. 19157, which he assigned to the British Admiralty in order to prevent its publication.

So Einstein realized just how special the nuclear chain reaction and the release of the energy in an atom would be.

So there were four or five sites that would have been the site for the first nuclear chain reaction and the first operating reactor, but for the further intervention of the U.S. Government.

They went out and they explained to Einstein that «There is this incredible concept which we've tested which is a nuclear chain reaction.

In December 1938 he sat down frustrated and he wrote a letter to the Admiralty and he said, «The idea of a nuclear chain reaction won't work.

The following spring he patented the chain reaction and he mentioned indium and beryllium and uranium as possible elements to sustain his nuclear chain reaction.

Having this now certified, Szilard was really scared of what would happen with a nuclear chain reaction in the wrong hands.

So Fermi went back to Columbia and reported, «There's just no interest in this at all,» which only drove Szilard to be madder and more determined to find ways to understand the nuclear chain reaction.

Nov. 13, 2017 - Gathered in a control room deep in the Nevada desert, a team of researchers from Lawrence Livermore and Los Alamos national laboratories watched safety monitors as a carefully layered stack of plutonium inched toward «critical» — the point at which fissile material can sustain a nuclear chain...

We invented the Twinkie and started the first nuclear chain reaction.

Commissioned to commemorate the 25th anniversary of the first controlled nuclear chain reaction.

The problem comes mainly from the State of Nevada's fierce opposition to the planned repository on the grounds that it is unsafe and vulnerable to potential volcanic activity, earthquakes, water infiltration, underground flooding, and nuclear chain reactions.