ke . 47 ¥ _ The concentration of tritium in the Gulf of Mexico is lower than it is in the Mississippi River, and the radiation dose to the marine life due to tritium is also lower because organisms do not concentrate tritiun apnreciably. No harmful radiation effects on the marine life in the Gulf of Mexico are expected because as far as is known, aquatic organisms are much less “gensitive to ionizing radiation than human beings, for whom the FRC's Radiation Protection Guides were established.