Table 1. Nonfission products - continued Per cent abundance at! One One One Ten week month year years 2, Radiation 3) energy, Mev Beta Gamma Min4 EC Colt EC zn? Bte.32 1.12 Fe? Feo? (for man) 84 290 days .12* 270 days EC 46" none 1.1% Btw 47 231 81 1.17* 5 days Critical’ organ liver 0.0013 liver 0.0072 2.6 years 4S days 65 65 " " blood plood 71 days 5.2 years 8 8 i" " liver liver 250 days 8 23. " =~" mec??? pe /m1 bone 0.005 0.0001 0.0015 0.02 0.06 q¢ C038 co80 Half lire???) Physical Biological * ** and others Maximum permissible concentration in drinking water based on the assumption that water consumption is 2200 ml per day and that water is the only source of radioisotopic contamiValues can be directly extrapolated to grams of food when compensation is made nation. for the difference between the daily intake of water and food (1) Hunter and Ballou , 1951 (2) Strominger et al, 1958 (3) Kinsman, 1957 (4) NBS Handbook No. 52, 1953 (5) Lowman, 1957