Question

Large amounts of depleted uranium (238U) are available as a by-product of uranium processing for reactor fuel and weapons. Uranium is very dense and makes good counter weights for aircraft. Suppose you have a 4390 kg block of 238u. (a) Find its activity (in Ci). X Ci (b) How many calories per day are generated by thermalization of the decay energy? cal/day (c) Do you think you could detect this as heat? Explain. This answer has not been graded yet. +

Answer 1

Soin M 439019 4390810 2389 of 6258 has alo. of atoms. 681025 them 210-04 atoms u239 1390218 6X1023 X 4390 X103 110.7 x 1026 Hlow mean life time of v 238 238 17 and a mean S. 2 7. 09 816 rec 1-41 X 16+7 26 1G decay/sec To Activity of the Semple (t) = AN 7:09 81678 x 10.7 X10 7.85*1010 decays sec 3:7 X10" so 0-785 710 0 21261 (62 37 41011 Single decay energy released ~ 200mer .st we calculated total alo. of decay in 24 hours & 7.85800 x 24x60X60 6. 78 Xre" decays When 4258

_14.85 None hence energy released by this musch de Guy 200 Mev x: 6:58:X10?? 200 x106 x 1680-19 X 6. 78 X10 :.62 376 x 10 Joule as 4.2 Joule - Teal so 62.376 8109 • 4-21 (C) The enessy gain from decay easily as heat and in Aluclear powes. plant this bed iswhed foo e kapcity Gencsation 그 dae seen
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