or F.3 CALCULATION OF MATERIAL BALANCE The fallout pattern was evaluated out to the 100 r/hr at 1 hr contour by measuring the areas between contours in sq em and assuming the arithmotical average of the perinheral contours as the average level of activity for the area segment batween the contours. There is some indication that the average value of activity between ccntours is not arithmetical, However, existing field data do not indicate any one continuous function that describes it precisely. for Shot 1 are given in Table F.1. Material balance data TABLE F.1 - Material Balance, Shot 1 Contours considered in determination of areas (Fig. 6.6) (rfnr at 1 hr) 300C to center of A&verere levels between contours at 0+ 9 days (r/nr) ~ A ( rea ) sq om Total rat (n ot s/s photons/sec 20 pattern 3.42 5.3 x 1013 1.87 x 10 2000 to 3900 2.85 7.5 x10'3 2,2 x 1020 1000 to 2000 1.71 1.0 x 10/4 1.76 x 10°° 1.56x 104 1,38 x 10°? 3.35 x 104 43.38 x 1020 500 to 1000 100 to 500 0,96 0.342 ee go. 2 ) Therefore, within the 100 r/hr at 1 hr contour 2.39 x 10° photons per sec are accounted for at 0 + 9 days. 8439 x 1029 . 0.57. 1.47 x 10° Thus, 57 per cent of the device activity is accounted for. Fe4 FRACTION OF THE DEVICE COLLECTED IN TOTAL COLLECTOR, STATICN 251,03 A radiochemical analysis+® on the fallout collected at Station 251.03, where the gamma field reading was 1 r/hr at 0+ 9 deys, yielded a value of the bomb fraction over a 1 sa ft area to be 1.3 x 107 3. V6 This VR ‘NO 4 i 1 rfhnr at 0 + 9 days is produced by an infinitely contaminated plane of uniformly denosited activity of 1.03 x 10° photons per sec per sq Cm.