题目内容
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Nuclear fuel will be used in the reactor after its ______ into the form. of rods.
A．having compressed
B．to have been compressed
C．having been compressed
D．have been compressed
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更多“Nuclear fuel will be used in the reactor after its ______ into the form. of rods.A．having”相关的问题
Iran is found to be______.
A．producing nuclear weapons
B．creating fuel for nuclear reactors
C．setting up about 100 centrifuges
D．enriching uranium
According to the news, what did Iran resume on Monday？
A．Production of fuel for nuclear reactors.
B．Small-scale uranium enrichment.
C．Completion of nuclear weapons.
D．Maintenance of atomic weapons.
A．withdrawing from the Nuclear Nonproliferation Treaty.
B．taking steps to restart frozen nuclear facilities.
C．having a covert nuclear program.
D．expelling U.N. monitors.
SECTION C NEWS BROADCAST
Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. At the end of each news item, you will be given 10 seconds to answer the questions.
听力原文： A top Russian official says his country and Iran will soon sign a deal paving the way for deliveries of nuclear fuel to the Iranians. Russian Atomic Energy Agency head Alexanda says the deal will require Iran to return all spent nuclear rods to Russia for storage and processing. He said the agreement is to be signed in Iran in the next three or four months with 'Russia starting fuel shipment shortly thereafter; The requirement that spent fuel rods be returned to Russia is intended to meet U. S. concerns over the possibility that Iran could divert nuclear materials for use in weaponry.
Which of the following is NOT included in the agreement to be signed between Russia and Iran？
A．Russia will deliver nuclear fuel to Iran.
B．Iran will ship waste nuclear rods back to Russia.
C．The two countries will build a road for the shipment of nuclear fuel.
D．Russia will be responsible for the storage of the waste nuclear rods.
A．We have already generated over 10,000 tons of nuclear waste.
B．Radioactivity could be released into the environmental from activities related to mining and processing nuclear fuel.
C．Only a part of nuclear fuel is fissionable.
D．A location for stainless steel tanks containing "high-level liquid waste" mixed with molten glass has not been found.
A、Profitable Nuclear Power Generation
B、International views on nuclear safety
C、Safety evaluation of spent fuel road transportation based on weighted nearest neighbor method
D、The International Safety Framework for nuclear power source applications in outer space—Useful and substantial guidance
In the United States, there is some disagreement (to say the least) over the risks and benefits .of nuclear power. There can be no question that with our electrical power needs increasing rapidly, we cannot rely indefinitely on the earth's remaining fossil fuel supply. The question is, can we safely shift our reliance to nuclear fission power plants—considering the present state of our knowledge and technology？ The American public has, in the past few years, developed a rather strong consensus regarding this question. Nuclear power has fallen into disfavor. The risks seem too great, the reward too small—at least for the immediate future.
It is not likely that an explosion of the type produced by atomic bombs can occur in the kinds of nuclear reactors being used today. However, we still don't know how close we came to a major tragedy at Three Mile Island. A far greater tragedy occurred at a nuclear plant at Chernobyl, in the Soviet Union's Ukraine in 1986. The risks associated with nuclear power, however, are not always so spectacular. Some are of a far subtler nature. For example, radioactivity could be released into the environment from activities related to mining and processing nuclear fuel, from the transportation and recycling of the fuel and from storage of the radioactive wastes. We frequently hear of steam or gas leaks from the reactors themselves. ;And even the safest reactors normally leak small amounts of radiation into their immediate environment. (The problem with this is that there are no "safe" levels of radioactivity--only "acceptable" levels. )
We could probably greatly reduce the risks associated with nuclear power by simply exercising more care and common sense. There are numerous published accounts that attest to our carelessness, however. For example, it has been revealed that the Diablo Canyon nuclear power plant in California was built on an earthquake fault line. At the WNP-2 plant in Washington State, the concrete contained air bubbles and pockets of water as well as shields that had been incorrectly welded. In 1981, the Nuclear Regulatory Commission inspected forty-three plants that were under construction and rated seven "below average" and thirty-six "average". None were rated even "above average".
Completely apart from the possibility of accidents, there is the unsolved problem of what to do with the radioactive wastes generated in the course of normal nuclear plant reactions. The problem is a tough one since such wastes can only be rendered safe by the passage of time. The waste radioactivity is .generated in the fuel system of the reactors because only a part of the fuel is fissionable and, for technical reasons, not all of the fissionable elements are spent. Much of the spent fuel materials removed from the reactor can be reused. However, some of the radioactive fuel in the spent elements cannot be removed, and this material adds to the radioactive waste.
We have already generated over 10,000 tons of nuclear waste, with another 47,000 tons expected by 19951 Most of the waste is in the form. of fuel rods which are, for now, stored in baths filled with a solution of neutron-absorbing boric acid. The problem is that these are only temporary repositories and,' unless new space is found, existing plants must begin closing for lack of space. The rods can be reprocessed, but the technology could lead to the fuel for nuclear weapons.
The reprocessing also leaves "high-level liquid waste" that must be stored. The prevailing idea at the moment is to dry the liquid and mix it with molten glass that, when it hardens, can be stored in tanks. Suggestions range from burying it in the Antarctic to sending it into space.
Which of the following statements best expresses the main idea of the selection？
A．Numerous risks and problems have made nuclear power an unpopular energy source.
B．There are fewer risks associated with nuclear power than the public believes exists.
C．Explosions of the type produced by atomic bombs are unlikely.
D．The primary problem at nuclear power plants is structural defects.
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