Word: uranium
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Botha's performance left most U.S. Senators cold. Three days later, by a vote of 84 to 14, the Senate adopted a strong package of economic sanctions that bans imports of South African textiles, steel, uranium, coal and agricultural products. It also bars new U.S. investment in South Africa, bans new bank loans and ends landing rights for South African Airways. The Senate sanctions stopped short of the bill voted last June by the House, which called for a comprehensive trade embargo and total U.S. disinvestment. But it was a serious setback for the Reagan Administration's policy of avoiding...
...other six leaders present, this was nowhere near enough. Together they endorsed a set of sanctions proposed at a previous Commonwealth gathering that included a ban on agricultural imports, new investment and air links. For good measure, they added a ban on new bank loans and the import of uranium...
...committee approved a bill that would ban all new investments in South Africa by U.S. companies and prevent any U.S. banks from making new loans to any private companies operating there. It would also stop airline service between the U.S. and South Africa and outlaw imports of coal and uranium from that nation...
When a nuclear reactor is running, its heat comes from the fissioning, or splitting, of the nuclei of uranium or plutonium atoms. These nuclei break apart when bombarded by neutrons, uncharged subatomic particles that are initially provided by a reactor ignition device. The shattered nuclei release energy and emit more neutrons. When uranium atoms are packed closely together, however, as they are in power-plant fuel rods, the neutrons emitted by the splitting nuclei break up other nearby nuclei. Each shattered nucleus contributes more neutrons and heat to what has now become a chain reaction, and the heat is used...
...MHTGR, in contrast, has no safety cooling system at all; the helium gas flowing through its core merely carries away heat to power electric generators. The reactor itself can never get hot enough to melt down. In the MHTGR, bits of uranium fuel are encapsulated in tiny grains made of carbon and silicon compounds. The fuel particles, which are embedded in racquetball-size "pebbles" of graphite, will remain intact up to 3600 degreesF. But the configuration of the core and the reactor's size (it generates only 80 megawatts of power, compared with 1,000 megawatts for large conventional reactors...