With respect to storage, the inventory of radionuclides in a closed system,-when added at a known rate, can be calculated from half-lives, but the hazards, as indicated above, cannot. Radioactive waste storage facilities must resist corrosion and handle any heat generated within the wastes. Their design thus require inventories of the specific radionuclides and data on the physical and chemical properties of the non-radioactive components of the wastes. An inventory categorization by half-lives would be neither essential nor adequate. Question 1B Can the 1968 estimated total be subdivided also into categories of initial , location? curies released into the rivers. curies buried at sea (if any). re] n ft euries dribbled into the ground. ecuries contained in tanks. solidified and stored. 5 | bd bd DE be DE Dd DE be De Dd X euries without location; decayed 100% in less than 1 day. curies released into the air. curies released directly into the oceans euries trapped underground in cavity glass. eurles in underground water. curtes buried in land. Every curies has to be somewhere initially, and isn't some idea of initial disposition indispensable for ecological calculations? Answer The cited categories appear to be a mixture of places where radioactivity is stored indefinitely and places from which activity is released or where it is unconfined. However, in most AEC operations the initial location can be considered to be a nuclear reactor or the point of nuclear detonation. In reactors the radionuclide build-up over a period of time varies with the type of fuel and the half-life of specific radionuclides produced. Some