PTL d. The energy delivered is all derived from the beta emissions,. having a mean energy of 0.4 Mev when in the lower large intestine. e. . (See Graph Cne)*. | Lo - The total daily consumption of food and water is 2200 grams . or milliliters, | The method of calculation is according to the following equation: (total mimber of d4sintegrations occurring in orgen)(Energy of emissions)(B. 0x10°9) (Mass of Organ) } . . . | « Dose (rads) (1)* The number of disintegrations taking place in the organmay be calculated according to equation two: . | Total number of disintegrations = 5A, ty Where: fi". tT(2) A, = number of disintegrationsper unit time at time “a” after detonation. t, = time "a" after detonation. coe = ty, = time "b” later than “a, ---- One of the more useful forms for the criteria would be in units of permiséiple concentrations at time of intake. This will somewhat camplicate the ‘calculations since there will beadecrease in activity as the material passes along the gastrointestinal tract. When such calculations are made according to the above assumptions and equatiozs, it may be seen that the critical organ is the lower large ixtestine except for the first hours in- mediately following the detonation. (Table One shows the relative doses * The rad is the unit of absorbed adcse equal to 100 ergs per gran. 1.62107 (ergs/Mev)0.5 (oropertion of total energy to gastrointestinal tract) 2-2 - « 8.0 x 107 - DOE ARCHIVES /\ 100 (ergs/gm-rad)