en, oS ec. Those who had ingested smaller quantities developed cancer of the bones. Such tumors usually developed more than fifteen years after first exposure to the hazard d. Information from these cases subsequently provided valuable data in establishing maximum permissible radiation doses 4, Manhattan Project and AEC a. Excellent safety record achieved by the contractors of the AEC and its predecessor, the Manhattan Engineering District (1) b. Description of the safety record Incidents at both AEC and private installations (1) Description of several incidents resulting in discernible injuries (a) Los Alamos decontamination accident (1957) (vo) Release of radioactive materials at a Texas plant with subsequent contamination (1957) (c) Inadvertent plutonium criticality at Los Alamos (1958) Basic nature of matter (understanding of the nature of radiation and its biological effects needed in order to comprehend how harmful effects take place and how they can be avoided) 1. Atomic structure a. Nucleus constitutes nearly all the mass and contains protons and neutrons (1) Protons have positive electrical charge and are heaviest of the particles 1-2 DO® ARCHIVES »

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