CONTENTS INTRODUCTION SECTION I. RADIATIONS A, 4 General Background Information s 1. Natural Background and Medical Exposures eels 2. Sources and Nature of Fallout rea e unc SECTION II, t | 4 B. Whole Body Exposures C. Skin Exposures D. Iodine-131 E. Strontium-90 and Strontium-89 F, Carbon-i4 G. Water and Air OTHER ASPECTS A. Blast +, Direct and Reflected B,. Thermal - Flash and Heating Effects C. Weather D, Ground Motions - Earthquakes SECTION III. GENERAL EVALUATION APPENDIX Safety Procedures at the Nuclear Testing Sites