单词 | plutonium 239 |
例句 | The report says the plutonium 239 at the Perma-Fix plant — about a mile from a child care center — poses a special risk because, if inhaled in small quantities, it can lead to cancer. New watchdog report documents fires, violations at company treating Hanford wastes 2020-11-25T05:00:00Z Carried out in secret, the tests examined how toxic substances, including uranium and plutonium 239, would react when burned or blown up. Australia’s Least Likely Tourist Spot: A Test Site for Atom Bombs 2018-04-15T04:00:00Z B-52 bomber and a refueling plane crashed into each other near the Spanish village of Palomares, releasing four hydrogen bombs and scattering highly radioactive plutonium 239. The Latest: Veterans Affairs mum on veterans’ court filing 2017-12-11T05:00:00Z The quantities of especially dangerous isotopes such as plutonium 239 and plutonium 240 appear to be insignificant. What it was like to live in Chernobyl's shadow in 1992 2016-04-26T04:00:00Z Two were recovered intact from the sea but the others leaked radiation into the surrounding countryside when their plutonium-filled detonators went off, strewing 3kg of highly radioactive plutonium 239 around Palomares. US to clean up Spanish radioactive site 49 years after plane crash 2015-10-19T04:00:00Z None exploded, but two detonators went off, spilling about seven pounds of plutonium 239 across the coastal landscape in the Spanish province of Almeria. Spain and U.S. Sign Agreement on Palomares Hydrogen-Bomb Cleanup 2015-10-19T04:00:00Z The Environmental Protection Agency found that sponges bore “readily measurable” amounts of plutonium 239 and plutonium 240 — types of man-made radioactive materials that seldom exist in nature. Drumbeat of Nuclear Fallout Fear Doesn?t Resound With Experts 2011-05-02T21:13:55Z If temperatures rise higher, threatening to melt the core entirely, he added, less volatile products such as strontium 90 and plutonium 239 join the rising plume. From Far Labs, a Vivid Picture Emerges of Japan Crisis 2011-04-02T19:55:19Z 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 The uranium 238 then captures the neutron and is transformed into a new element, plutonium 239, which is also fuel. Bridging 2 Kinds of Reactors 2010-06-23T13:30:00Z Yet some of the neutrons strike atoms of uranium 238 and are absorbed, transmuting the uranium into plutonium 239, which is also a good reactor fuel. Slide Rule Cedes to 'the Traveling Wave' 2010-06-16T15:02:00Z When the reactor begins operating and throwing off neutrons, some of those would be captured by the uranium 238 and would then be transmuted into plutonium 239, a good reactor fuel. TerraPower Gets $35 Million Investment 2010-06-15T03:10:00Z The United States used reactors to convert uranium 238 into plutonium 239 in making the bomb that it dropped on Nagasaki in 1945; that is also how North Korea built its bomb in recent years. Bridging 2 Kinds of Reactors 2010-06-23T13:30:00Z |
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