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...Lesson for Nasa! US Airmail and Aviation
In sci.space.policy Henry Spencer wrote:
For example, I see no mention of the problem of keeping the collection system free of barnacles and other sea life, a problem that's never been fully solved even for ships. Bear in mind that we're talking about doing chemical processing on an enormous scale. To get 30 TW-yr worth of U-235 per year, assuming complete recovery of U-235 from natural uranium, would require complete extraction of the uranium content of about a cubic kilometer of seawater per *minute*. I'm not aware of any chemical process -- not even purification of drinking water -- which has ever been done on anything like that scale. The trick is growing the right kind of sponge as the filtration medium ;-) -- Sander +++ Out of cheese error +++ |
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