| 单词 | fissionable |
| 例句 | Chemically distinct from uranium and therefore theoretically separable by chemical means, element 94 appeared to be about five times more fissionable than uranium. Big Science 2015-07-07T00:00:00Z The “alpha racetracks” like this one at Oak Ridge separated fissionable U-235 from natural uranium at a high volume, though not enough to build more than a single bomb. Big Science 2015-07-07T00:00:00Z Their task was to choose the most effective method for producing the fissionable fuel for an atomic bomb from among five options, none of which was appreciably better than the others. Big Science 2015-07-07T00:00:00Z There were also four possible approaches for separating fissionable U-235 from natural ore. Big Science 2015-07-07T00:00:00Z But a long-lived fissionable isotope, especially one that could be chemically separated from its uranium grandparent, might be especially suitable for a bomb. Big Science 2015-07-07T00:00:00Z The sample weighed about a thousandth of a grain of sand, but it was thirty-four times more concentrated with the fissionable isotope than was natural uranium. Big Science 2015-07-07T00:00:00Z The main problem, Ernest concluded, was the difficulty of tracking fissionable material in the Soviet Union to ensure that it was not finding its way into weapons. Big Science 2015-07-07T00:00:00Z The report discussed three possible military applications for fissionable uranium: dropping radioactive materials over enemy territory; generating power for submarines and other oceangoing vessels; and development of a bomb based on U-235. Big Science 2015-07-07T00:00:00Z By transmuting common uranium into a fissionable product that could be extracted chemically, Seaborg calculated, they could increase the supply of raw material available for a bomb by a hundredfold. Big Science 2015-07-07T00:00:00Z Oppenheimer once called the atomic bomb “a weapon for aggressors” wherein “the elements of surprise and terror are as intrinsic to it as are the fissionable nuclei.” Movie Review: A bomb and its fallout in Christopher Nolan’s ‘Oppenheimer’ 2023-07-19T04:00:00Z We can enhance the number of fissions produced by neutrons by having a large amount of fissionable material. College Physics for AP Courses 2015-08-12T00:00:00Z The amount of a fissionable material that will support a self-sustaining chain reaction is a critical mass. Chemistry 2019-02-14T00:00:00Z When the pieces came together, they created a supercritical mass of fissionable, explosive uranium. Column: 75 years ago today, the Trinity A-Bomb test ushered in the era of nuclear warfare 2020-07-16T04:00:00Z Such a big presence would be needed to secure and remove WMD any materials with "enough fissionable plutonium and uranium by build up to 75 weapons by 2020," the report said. What is OPLAN 5029? The 'Mission Impossible'-style plan in place to secure North Korea's nukes 2020-05-02T04:00:00Z Iran waited a year before beginning to break limits of the accord, each move slightly narrowing the estimated year it would need to have enough fissionable material for a nuclear weapon. Downing of jet in Iran reveals Islamic Republic’s wider woes 2020-01-26T05:00:00Z Some neutrons escape the fissionable material, while others interact with a nucleus without making it fission. College Physics for AP Courses 2015-08-12T00:00:00Z The reactor works by separating the fissionable nuclear material such that a critical mass cannot be formed, controlling both the flux and absorption of neutrons to allow shutting down the fission reactions. Chemistry 2019-02-14T00:00:00Z All such potential articles would be fissionable enough to incinerate many a political career if a lawmaker were to vote the wrong way. Reporter's Notebook: House votes on impeachment articles would be monumental decisions 2019-12-08T05:00:00Z Any such claim should be “objectively” true, relating to weapons, war, fissionable nuclear materials or an “emergency in international relations”, according to the ruling. U.S. says WTO national security ruling 'seriously flawed' 2019-04-26T04:00:00Z Meanwhile, the National Nuclear Security Administration and Department of Defense have floated the idea of converting surplus weapons-grade plutonium at SRS into “pits” - the fissionable core of bombs. South Carolina editorial roundup 2019-01-23T05:00:00Z Two things are needed—a minimum level of technical expertise and sufficient fissionable material. College Physics for AP Courses 2015-08-12T00:00:00Z Since then, hundreds of different isotopes have been observed among the products of fissionable substances. Chemistry 2019-02-14T00:00:00Z But inventions that would be useful only in the production of fissionable material, or when using such material or atomic energy in a military weapon, were non-patentable. Use the patent system to regulate gene editing 2018-10-22T04:00:00Z When work began there in 1943, construction of the site at Oak Ridge, Tennessee, had not begun, and the methods for producing a fissionable material were still theoretical. My nuclear family: The legacy of the Manhattan Project 2018-09-30T04:00:00Z A criticality accident is an uncontrolled chain reaction involving a fissionable material such as plutonium that releases energy and generates a deadly burst of radiation. Safety lapses undermine nuclear warhead work at Los Alamos 2017-06-17T04:00:00Z There are international agreements and organizations that attempt to control nuclear proliferation, but it is increasingly difficult given the availability of fissionable material and the small amount needed for a crude bomb. College Physics for AP Courses 2015-08-12T00:00:00Z Material that can sustain a nuclear fission chain reaction is said to be fissile or fissionable. Chemistry 2019-02-14T00:00:00Z Crucially, the relative amounts of the four fissionable isotopes change as a reactor consumes its fuel. Weird sterile neutrinos may not exist, suggest new data from nuclear reactors 2017-04-06T04:00:00Z For example, not long after 9/11 the CIA was told of an al Qaeda effort to obtain nuclear fissionable material. Sorry Mad Dog, Waterboarding Works 2016-12-09T05:00:00Z The payment made to Iran was giving Iran its own money back, in return for which the International Atomic Energy Agency says Iran offloaded at least 90 percent of its fissionable material. Donald Trump is hardly Churchillian 2016-08-23T04:00:00Z The production of fissionable fuel itself is technologically difficult. College Physics for AP Courses 2015-08-12T00:00:00Z An amount of fissionable material that cannot sustain a chain reaction is a subcritical mass. Chemistry 2019-02-14T00:00:00Z U-235, or enriched uranium, is the fissionable isotope that creates the chain reaction in nuclear weapons and nuclear reactors. Depleted uranium at Wah Chang led to decades of health woes 2016-06-21T04:00:00Z Clearly even with a very small amount of fissionable material, multiplying it by the square of 300 million yields a very big number. The Smart Way to Play God with Earth's Limited Land 2012-01-20T22:15:00.427Z You'll have Geiger counters and a krypton analyser of course, although the analyser is no guarantee in detecting fissionable material production. The Image and the Likeness 2011-08-23T02:00:33.617Z Eventually, the fissionable uranium-235 was depleted, and the Gabon natural nuclear reactors shut down. Nature's Nuclear Reactors: The Two Billion Year Old Natural Fission Reactors in Gabon, Western Africa 2011-07-13T11:15:00.240Z Nuclear power plants are designed in such a way that they cannot form a supercritical mass of fissionable material and therefore cannot create a nuclear explosion. Chemistry 2019-02-14T00:00:00Z MOX fuel, on the other hand, substitutes plutonium 239 as the fissionable component, reducing the need for uranium 235. MOX Battle: Mixed Oxide Nuclear Fuel Raises Safety Questions 2011-03-25T20:46:17.520Z A key calculation is how much fissionable material is available at each step. Slide Rule Cedes to 'the Traveling Wave' 2010-06-16T15:02:00Z "Stockpiles of fissionable material," said the President, "which could quickly be converted to weapons use should also be discussed." Check and Checkmate Each full of precious equipment, to say nothing of invaluable fissionable material!' Wait for Weight A fissionable isotope must be present in large enough quantities to sustain a controlled chain reaction. Chemistry 2019-02-14T00:00:00Z I hope, doctor, that your termite species is neither explosive nor fissionable in any way. The Brain What makes the whole thing terrible is that the freighter is loaded with fissionable material exported from Ganymede. Jack of No Trades An astonishing amount of fissionable material would be fashioned into bombs—a concession by Calhoun—and plastic factories make an astonishing number of plastic sag-suits. Pariah Planet "There are, or were, three chief sources of fissionable ores," Harkaman said. Space Viking Patents relating to fissionable materials must be filed with the Commission, the "just compensation" payable to the owners to be determined by a Patent Compensation Board designated by the Commission from among its employees. The Constitution of the United States of America: Analysis and Interpretation Annotations of Cases Decided by the Supreme Court of the United States to June 30, 1952 An astonishing amount of fissionable material would be fashioned into bombs—a concession by Calhoun—and plastic factories would make an astonishing number of plastic sag-suits. This World Is Taboo The range of alpha particles from the unused active material and fissionable material of the bomb is even smaller. The Atomic Bombings of Hiroshima and Nagasaki Not only would the psychological impact of the weapon be lost, but the enemy might recover large amounts of fissionable material. Project Trinity 1945-1946 Do you know why that planet was so extensively colonized by the Federation, when there don't seem to be any fissionable ores? Space Viking |
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