From: Roy Mayeda (roy_mayeda@isd743.k12.mn.us)
Date: Mon Sep 30 2002 - 10:14:56 PDT
Date: 30 Sep 2002 12:14:56 -0500 Message-ID: <968749246roy_mayeda@isd743.k12.mn.us> From: Roy Mayeda <roy_mayeda@isd743.k12.mn.us> Subject: Re: pinhole lead and plutonium
Saw the same figures as Neil on the accumulation of plutonium. Note: Since Pu-239 is produced from U-238 in reactors, its supply is finite as well. (Natural abundance of U-235 was given as about 0.72% of total uranium, so it is rather inefficient to refine it, and it makes Pu-239 production much more appealing.) That Pt is rather pricey compared to lead is an understatement! But it might lead to an interesting line of questioning: What would a brick made of Pt cost vs. Pb? What would the masses of those bricks be? (Use "standard" building bricks as a comparison.)
Roy Mayeda
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