| 单词 | control rod |
| 例句 | Operators vainly tried to stop a meltdown by planning to shove control rods in by hand. Looking Again at the Chernobyl Disaster 2019-04-03T04:00:00Z They include worn control rod switches, the 2,000-ton reactor lid nicknamed Elena, a core so huge that understanding its behavior was impossible. Looking Again at the Chernobyl Disaster 2019-04-03T04:00:00Z That’s a process in which all control rods are inserted into the reactor core to stop the nuclear fission reaction and generation of heat and pressure. U.N. nuclear chief says large Ukraine atomic power plant held by Russia faces ‘dangerous situation’ 2023-06-13T04:00:00Z That means control rods have been inserted into the reactor core to stop the nuclear fission reaction and generation of heat and pressure. Last Reactor at Zaporizhzhia Nuclear Plant Shut Down After Dam Collapse 2023-06-10T04:00:00Z Shutting down a nuclear reactor involves inserting control rods between the fuel rods to stop the fission reaction. Kakhovka dam breach raises risk for Zaporizhzhia nuclear plant 2023-06-07T04:00:00Z Within seconds, control rods positioned above reactors at Ukraine’s three working plants dropped into cores to absorb neutrons and stop the chain reaction that could lead to a meltdown. How Ukraine Won the War to Keep the Lights On 2023-04-11T04:00:00Z Follow-up work in the field and lab confirmed not just elevated levels of rare earths, but also niobium and zirconium, minerals used in jet engine components and nuclear control rods. A government program hopes to find critical minerals right beneath our feet 2023-03-19T04:00:00Z Palisades is out of nuclear fuel, needs to fix a control rod drive seal issue, and may need a new company to operate it, and a buyer for the power it generates, analysts have said. U.S. nuclear plants expect government decision on credits by year-end 2022-11-15T05:00:00Z Conversely, if the control rods are removed, fewer neutrons are absorbed, and the fission rate and energy production increase. Chemistry 2019-02-14T00:00:00Z Each of the two reactor cores is made up of 3,000 bricks which form vertical channels for nuclear fuel and control rods to slide in and out. Hunterston B nuclear power plant to close down after 46 years 2022-01-06T05:00:00Z The control rods absorb neutrons, which stops the nuclear fission process. Nuclear power plant north of New York City to start shutdown 2020-04-29T04:00:00Z Graphite control rods, which should drop into the core to absorb neutrons and stop the reaction, fail to respond. Smaller, safer, cheaper: One company aims to reinvent the nuclear reactor and save a warming planet 2019-02-21T05:00:00Z Inside the reactor a boron control rod will slide into a pile of uranium and start a nuclear chain reaction, splitting uranium atoms apart and releasing heat. Will NASA Go Nuclear to Return to the Moon? 2018-05-15T04:00:00Z In an emergency, the chain reaction can be shut down by fully inserting all of the control rods into the nuclear core between the fuel rods. Chemistry 2019-02-14T00:00:00Z The graphite bricks form channels which contain nuclear fuel and the reactor control rods, while allowing carbon dioxide coolant to remove heat from the reactor fuel and core. Cracks in British nuclear reactor ring power alarm bells 2018-05-09T04:00:00Z At every step of the process Fermi calculated the expected neutron emission, and slowly removed a control rod to confirm his expectations. Atomic Age Began 75 Years Ago with the First Controlled Nuclear Chain Reaction 2017-12-03T05:00:00Z With the cadmium control rods removed, the neutron count began to rise, until the reaction was self-sustaining. The atomic age began with a secret test 75 years ago. Meet the last surviving witness. 2017-12-01T05:00:00Z Now, the only bulwark against criticality is a single control rod piercing the heart of the reactor. U.S.-China mission rushes bomb-grade nuclear fuel out of Africa 2017-08-31T04:00:00Z In usual practice, both a moderator and control rods are necessary to operate a nuclear chain reaction safely for the purpose of energy production. Chemistry 2019-02-14T00:00:00Z A thoughtful museum that confronts history honestly is like the control rod inserted into a nuclear reaction, absorbing and nullifying rampant energies. Perspective | What to do with the noose left at the African American Museum? Make it part of the collection. 2017-06-01T04:00:00Z As a safety mechanism, the cadmium control rods could quickly be inserted if something started going wrong, to shut down the chain reaction. Atomic Age Began 75 Years Ago with the First Controlled Nuclear Chain Reaction 2017-12-03T05:00:00Z After 28 minutes, when the radiation risk from the reaction became unsafe, Fermi ordered the control rods dropped back into the pile. The atomic age began with a secret test 75 years ago. Meet the last surviving witness. 2017-12-01T05:00:00Z Li gives the order to raise the control rod 2 centimeters at a time. U.S.-China mission rushes bomb-grade nuclear fuel out of Africa 2017-08-31T04:00:00Z In the reactor, 69 control rods slid smoothly into the hellfire furnace, creating an atomic sponge to soak up the neutron bullets. AP WAS THERE: Three Mile Island nuclear power plant accident 2017-05-30T04:00:00Z The ONR, has since agreed the stations can continue operating safely after modifying the reactor shutdown process include introducing super-articulated control rods that can more easily bend down any distorted channels. Nuclear reactor cracks 'challenge safety case' - BBC News 2016-10-30T04:00:00Z To make sure they could safely control the chain reaction, the team rigged together what they called “control rods.” Atomic Age Began 75 Years Ago with the First Controlled Nuclear Chain Reaction 2017-12-03T05:00:00Z On that otherwise ordinary December afternoon, cadmium control rods were removed from a pile of uranium spheres encased in graphite bricks. The atomic age began with a secret test 75 years ago. Meet the last surviving witness. 2017-12-01T05:00:00Z The temperature spiked, causing the control rods to get stuck, and a runaway reaction began. The Battles of Chernobyl 2016-04-26T04:00:00Z Move control rods, start and stop equipment, monitor and adjust controls, and record data in logs. 35 High-Paying Jobs That Don't Require a Bachelor's Degree 2015-10-23T04:00:00Z The reactor “scrammed” on Christmas Day 2014, dropping control rods into the reactor’s fuel core to halt the nuclear fission reaction. Nuclear regulator: Simulator problems hurt shutdown response 2015-09-12T04:00:00Z The cadmium control rods made sure the process wouldn’t continue indefinitely, because Fermi and his team could choose exactly how and where to insert them to control the chain reaction. Atomic Age Began 75 Years Ago with the First Controlled Nuclear Chain Reaction 2017-12-03T05:00:00Z He said utilities want incentive fees to take the MOX fuel because it would force nuclear reactor operators to make plant modifications, such as in the control rods, and take new security precautions. Energy secretary is urged to end U.S. nuclear fuel program at Savannah River 2015-09-09T04:00:00Z When the operators realized this, they attempted to shut it down completely, reinserting the control rods in an operation known as a scram. The Battles of Chernobyl 2016-04-26T04:00:00Z You stop a nuclear reactor by inserting enough of these control rods. Why is Japan restarting Sendai reactor? - BBC News 2015-08-11T04:00:00Z The utility that owns the plant, Kyushu Electric Power, said it removed control rods from the core of the reactor at 10:30 a.m. on Tuesday, initiating the atomic reaction that will eventually produce electricity. Japan Restarts Reactor, Lifting 2-Year Ban on Nuclear Power 2015-08-11T04:00:00Z The reactor can hold several 17-foot metal control rods that are pumped continuously in and out of the core. Idaho brings nuclear test reactor back to life 2014-10-05T04:00:00Z That is, the mechanism was put into operation by pulling a wire running from the pilot to a lever actuating the cam which moved the control rod. The Wright Brothers' Engines and Their Design 2012-02-04T03:00:15.650Z They inserted the control rods—graphite-tipped cylinders of boron carbide that slow or stop a nuclear reaction—too far into the reactor. The Battles of Chernobyl 2016-04-26T04:00:00Z In an automatic shutdown, control rods slide between the fuel rods and choke off the flow of neutrons. Green Blog: When an Earthquake Shuts a Reactor 2011-09-08T12:44:17Z As his two charges reached for the switch — a single flip will shut down the reactor — automatic systems raced ahead and dropped control rods into the core, stopping the fission chain reaction. At North Anna nuclear plant, reassurances but no final data on quake impact 2011-09-03T00:02:00Z Boron either is added directly to the coolant water or used in the control rods for the chain reaction. Radioactive tritium found in river near Vermont Yankee plant 2011-08-18T18:40:52Z Because there is no danger of radiation, participants are allowed right into the heart of the tower to see the reactor itself, with its control rods still wrapped in their plastic packaging. Holiday in Hell? 2011-07-24T23:14:46Z In an attempt to bring the reactor back up to an appropriate level of power, they raised the control rods. The Battles of Chernobyl 2016-04-26T04:00:00Z To control or shut down a nuclear chain reaction, control rods are used. Nature's Nuclear Reactors: The Two Billion Year Old Natural Fission Reactors in Gabon, Western Africa 2011-07-13T11:15:00.240Z Within minutes, control rods were inserted to stop the nuclear fission. Japan Plant Had Earlier Alert 2011-06-15T09:25:48Z The power station's two can be shut down by inserting control rods, or injecting nitrogen gas, to halt the nuclear reaction. Nuclear shutdown system on trial 2011-04-21T07:23:44Z For instance, because weapons-grade plutonium fissions more readily than uranium 235, reactors may need more robust control rods—neutron absorbers that shut down the nuclear chain reaction when inserted into a reactor's core. MOX Battle: Mixed Oxide Nuclear Fuel Raises Safety Questions 2011-03-25T20:46:17.520Z In April 2009, a control rod—the shutdown device used to stop the nuclear reaction in a plant's core—malfunctioned in Reactor No. 3 due to a leaking valve. Japan Plant Had Troubled Past 2011-03-21T03:47:19Z Reactors employing mixed oxide fuel may require extra control rods, made of boron or other neutron-absorbing materials, to slow down more fissile plutonium. Fate of Nuclear Plant in Japan Hangs in the Balance as Melting Continues 2011-03-19T00:15:06.053Z Once the reactor's control rods are between sections of fuel rods, how is fission slowed to where it is controllable? Quake Question #10: Why Are Spent Rods So Deadly? 2011-03-18T19:11:38Z The new system involves a redesign of the control rods and an updated nitrogen gas injection system. Nuclear shutdown system on trial 2011-04-21T07:23:44Z Science answers: A reactor is shut down by inserting control rods between the fuel rods. Quake Question #9: Why Didn't Reactors Melt Down Immediately? 2011-03-17T23:17:06Z Nuclear reactors utilize control rods made from elements such as cadmium, boron or hafnium, all of which are efficient neutron absorbers. What Happens During a Nuclear Meltdown? 2011-03-15T14:15:00.257Z According to Ruth H. Howes and Caroline L. Herzenberg, the authors of “Their Day in the Sun: Women of the Manhattan Project,” she then helped design and construct the control rods for a second reactor. Joan Hinton, Physicist Who Chose China Over Atom Bomb, Is Dead at 88 2010-06-12T02:40:00Z When the control rods are inserted into the core, they absorb neutrons and stop the fission chain reaction. Quake Question #10: Why Are Spent Rods So Deadly? 2011-03-18T19:11:38Z You normally have three safety systems… the control rods, the nitrogen and boron. Nuclear shutdown system on trial 2011-04-21T07:23:44Z The control rods are made of a neutron-absorbing material, so that they slow the rate of fission reactions. Quake Question #9: Why Didn't Reactors Melt Down Immediately? 2011-03-17T23:17:06Z Once again, the parts prone to leaking are nozzles through which the control rods for the reactor pass. An Old Nuclear Problem Creeps Back 2010-06-07T20:24:00Z In that period of time, he rationalized, he ought to be able to insert a sufficient number of cadmium control rods to bring the pile under control. Spillthrough A fixed control rod attached to the tank over which a tube fastened to the bell slides telescope-fashion is sometimes adopted; but such an arrangement is in many respects less admirable than the former. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Buddy Briskow was running the rig, and the dexterity with which he handled brake and control rod gave him pride. Flowing Gold Accordingly, they made sure that they had mechanisms in place that would rapidly drop the control rods back into the reactor. The Jargon File, Version 4.2.2, 20 Aug 2000 These individuals stood next to the ropes or cables that raised and lowered the control rods. The Jargon File, Version 4.2.2, 20 Aug 2000 If necessary, they would cut the cables, and gravity would expeditiously return the control rods to the reactor, thereby averting yet another kind of core dump. The Jargon File, Version 4.2.2, 20 Aug 2000 Modern reactor control rods are held in place with claw-like devices, held closed by current. The Jargon File, Version 4.2.2, 20 Aug 2000 |
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