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Article #7669Lunar He-3
From: "Paul F. Dietz"
Date: Tue, 11 Nov 1986 21:58
Date: Tue, 11 Nov 1986 21:58
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About concentrations of He-3 in lunar soil... The concentration of helium ranges from 1 to 35 ppm, with 15 ppm being the mean value for lunar maria soil. The ratio of He-4 to He-3 ranges from 2200 to 3000. Given those figures, the average concentration of He3 is around 5 ppb. One kilogram of He-3, currently worth $700,000 dollars, would require the processing of 200,000 metric tons of soil, at a cost of < $3.5/ton. Note that at 50% efficiency and $.05/KWH, one gram of helium-3 can generate $4100 worth of electricity. Higher efficiencies may be possible.
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From: DIETZ@slb-test.CSNET ("Paul F. Dietz")
Newsgroups: sci.space
Subject: Lunar He-3
Message-ID: <8611120617.AA02138@s1-b.arpa>
Date: Tue, 11-Nov-86 16:58:00 EST
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Posted: Tue Nov 11 16:58:00 1986
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