[填空题]Uranium has to be enriched if a nuclear reactor is built.

[单项选择]Why are experts worried about the enriched uranium in Eastern Europe and the former Soviet States
A. They might fall into the hands of terrorists.
B. They might cause nuclear pollution.
C. They might be sold to Russia.
D. They might be exchanged for weapons.

[填空题]The first nuclear reactor to provide electricity to a national grid opened in England in ______.

[填空题]Control rods in a nuclear reactor are used to control the amount of energy generated in a nuclear reactor. They can also be used to shut the reactor or to change the fuel.

[填空题]A nuclear reactor is protected by ____________________________ , a concrete radiation shield, a steel containment vessel, and an outer concrete building.

[填空题]Nuclear power has been considered as a source of cheap and safe energy.

[简答题]In Germany, nuclear power has been a repeatedly argued and widely felt issue for decades.

[单项选择]A factory that makes uranium fuel for nuclear reactors had a spill so bad it kept the plant closed for seven months last year and became one of only three events in all of 2006 serious enough for the Nuclear Regulatory Commission to include in an annual report to Congress. After an investigation, the commission changed the terms of the factory’s license and said the public had 20 days to request a hearing on the changes.
But no member of the public ever did. In fact, no member of the public could find out about the changes. The document describing them, including the notice of hearing rights for anyone who felt adversely affected, was stamped "official use only," meaning that it was not publicly accessible.
The agency would not even have told Congress which factory was involved were it not for the efforts of Gregory B. Jaczko, one of the five commissioners. Mr. Jaczko identified the company, Nuclear Fuel Services of Erwin, Tenn,, in a memorandum that became part of the public
A. law makers draw the conclusion that NRC has illegal documents.
B. they think NRC is hiding more information than it should be.
C. the public have the rights to know any potential hazards.
D. they think nuclear facilities are not a matter of national security.