Nevada Test Site Radionuclide Inventory and Distribution Program: Report No. 3, Areas 3, 7, 8, 9, and 10

As part of the Nevada Test Site Radionuclide Inventory and Distribution Program, 115 soil samples were collected and more than 1200 in situ measurements of gamma-emitting radionuclides were made in the northern and eastern parts of Yucca Flat. Analysis of the data led to estimated inventories of 215 Ci of /sup 239,240/Pu, 128 Ci of 137Cs, 92 Ci of 90Sr, 36 Ci each of 241Am and 60Co, 31 Ci of /sup 102m/Rh, 27 Ci of 238Pu, 25 Ci of 174Lu, 10 Ci of 152Eu, 8 Ci of 155Eu, 7 Ci of 154Eu, 5 Ci of 125Sb, 4 Ci of 101Rh, and 2 Ci of 134Cs in the surface soil of the accessible portion of Areas 8 and 10. Similar calculations with the data from Areas 3, 7, and 9 gave estimates of 145 Ci of /sup 239,240/Pu, 89 Ci of 152Eu, 62 Ci of 90Sr, 25 Ci of 137Cs, 14 Ci of 154Eu, 11 Ci of 241Am, 6 Ci each of 60Co and 238Pu, and 4 Ci of 155Eu. Additional in situ measurements at 30 locations in the southern part of Yucca Flat confirmed the low levels of radioactivity found there by an aerial survey. 1 ref., 57 figs., 10 tabs