82 



BIOLOGICAL EFFECTS OF ATOMIC RADIATION 



The method of computation used herein gives higher permissible sea water concentra- 

 tions for S'=, Ca*', Fe'', Sr"", and I"' than those in our two previous reports(2, 3). The 

 difference in the permissible sea water concentration of Sr"" is particularly significant. Evi- 



TABLE 1.— CALCULATED PERMISSIBLE CONCENTRATIONS OF 

 RADIOISOTOPES IN LARGE VOLUMES OF SEA WATER. 



Case 1. Gastro-intestinal Tract is Not Critical Body Organ for Drinking Water 

 (Tentatively accepted values indicated by asterisk) 



Case II. Gastro-intestinal Tract is Critical Body Organ for Drinking Water 

 (Tentatively accepted values indicated by asterisk) 



dently, much larger quantities of this dangerous bone-seeker can be disposed of in sea water 

 than had previously been supposed. 



4. Research Recommendations. 



The Committee on the Biological Effects of Atomic Radiation on Oceanography and 

 Fisheries contributed a chapter entitled "Artificial Radioactivity in the Marine Environment" 

 to the NAS — NRC Committee on Oceanography's report "Oceanography — 1960-1970"(4). 



