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Comment Re:Cash grab of a bankrupt country (Score 2) 825

wrong, this is a tax against U.S. companies based on juristiction within the USA alone. It is the same as requiring U.S. citizen to pay U.S. income tax rate on any income from foreign company. It is of no concern to foreign companies and foreign governments, no treaties needed. These companies are already under the thumb of U.S. governement and must abide by U.S. law

Comment Re:No critical mass (Score 1) 282

Actually, many of the small space reactors DO use HEU; they also use neutron reflector (such as berrylium) so only kilograms of fuel needed.

Even in a weapon less amounts than "critical mass" are able to be used by certain techniques: neutron reflectors, compression of fuel, burst of neutrons from initiator particle accelerator after compression

Comment Re:No critical mass (Score 1) 282

No, you are confused. That badly named "critical mass" you speak of is really a "critical spherical configuration minimal mass". In other words, a sphere of material that will undergo self-sustaining fission by virtual of being large enough that enough emitted neutrons can interact with a nuclear rather than leaving. You can make a reactor or weapon with much less material. For example, in the case of a nuclear weapon, using compression and neutron reflectors and initiator (which makes burst of neutrons) means you can use a smaller mass (and indeed that is how it is done). In the case of a reactor, using a moderator to reduce the speed of fast neutrons to thermal neutrons (i.e. ones that hang around instead of running away) means you can use less material than that.

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