| a. The energy delivered is all derived fram the beta emissions, having & mean energy of 0.4 Mev when in the lower large intestine. e. (See Graph One )® The total daily consumption of food and water is 2200 grams or milliliters. The method of calculation is according to the following equation: (Total number of disintegrations occurring in organ)(Energy of emissions )(8.0x1077)= (Mass of Organ) ~ Dose (rads) (1)* The number of disintegrations taking place in the organ may be calculated according to equation two: Total number of disintegrations = 5A, +, Where: A, 1.2 (/t, 10.2 - t, “0.2, (2) number of disintegrations per unit time at time "a" after detonation. t, = time "a" after detonation. tp time "b” later than "a”. One of the more useful forms for the criteria would be in units of permissible concentrations at time of intake. This will somewhat complicate the calculations since there will bea decrease in activity as the material passes along the gastrointestinal tract. When such calculations are made according to the above assumptions and equations, it may be seen that the critical organ is the lower large intestine except for the first hours inmediately following the detonation. (Table One shows the relative doses * The rad is the unit of absorbed dose equal to 100 ergs per gran. 1.6x107° (ergs/Mev)0.5 (proportion of total energy to gastrointestinal tract) 100 (ergs/gm-rad) “9 -2.- 2 5.0 x 10 DOE ARCHIVES