Computaticn of iy was made for Shot 5 at 0+ 9 ceys.4/ Consideration wags mede of the contribution from fission products as well as that from u23? snd U237 induced activities, Since the capture to fission ratio for Shot 1 and Shot 5 were nearly the same these data were assumed reasonably velid for Shot 1 calculations. Similarly the beta particle to gemma photon ratio calculated for Shot 5 at C + 9 days was used in this evelustion.4/ Therefore, Y, = @x 1€3)(1.5_x_ 1023}(4 93 x 10°3)(1074) 0.45 Y, 1.47 x 1021 photon-/sec at 0+ 9 days, KELATIOLN OF NEPCSITEID ACTIVITY TO GAP2‘A FIELD AT 3 FT FOR AN INFINITE CONTAMINATED PLALE Let I, * K = radiation intensity in r/hr at time (t) 3 ft above an infinite contaminated smooth plane a constant vhich includes the air absorption ccerficient A, = deposited activity in He/sq cm et time (t) E. = averare gamma source energy in Mev/disintegration at time (t) thenky, I, = KEE. Let Bb = Aose *uild un factor®/or the ratio of the cose from all photons to that from unscattered photons R = source enerpy Gecradation cused by roughness of the = (KALE, )(E)(R), planei® then, T, t KA E 2 bo where ' I, : rediation intensity at time (t) in r/hr at 3 ft as measured in the field 144 as AN F.2 =