300 250 P LD {00 200r-4 £ { - 1 N i 1s0;—} \ \ \ \ \ \ \ ‘ NO 50 S NX qt 50 ‘< 0" pe a I A I rm ° LOG P— l 12 3 \ o 100 (to) in hours ) I 1@ Ee %&§ i 8 20 (To = Time of Arrival of Fall Out ocr LDo For Residual Damage Factor Fig. 15. The Lethal Criteria Expressed in Terms of Dose Rate (r/hr) at (t,) 72

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