INTRODUCTION . . Obvjectives . . . . Background ° . . . . 21 Field Operations : 2.2 Laboratory Operations 2.3 Instrumentation . . . . * e@ Inhalation Exposure ‘Equipment . Radiation Detection Equipment . Apparatus for Collection of Urine Specimens Counting Equipment for Radioassay of Tiesue Specimens . . . . TL . mee RESULTS " CHAPTER 3 . . # 2.3.1 2.3.2 2.3.3 2.3.4 PROCEDURES oo CHAPTER 2 s¥E . nd . geeeee oo + “Ves ACKNOWLEDGMENTS. - fet NX. . if 1.2 . @ . CHAPTER i . @ ABSTRACT wey aye As ‘. CONTENTS CHAPTER 4 4.1 4.2 4.3 oN, ote ee wpe pw 3.1 Air-borne Radioactivity Levels and Ground Surface Contamination 3.2 Thyroid Measurements . . . 3.3 Determinations of Radioactivity tn Samples of Urine . . 3.4 Radioassay of Tissue Specimens . DISCUSSION AND CONCLUSIONS Discussion . . Conclusions . Recommendations e . . . . . ILLUSTRATIONS CHAPTER 2 2.4 PROCEDURES 2.2 Restraining Box for Inhalation Exposure with Shield To Prevent Ingestion , . . Arrangement of Apparatus for Measurement of 2.3 Metabolism Cage for Postexposure Urine and 13. Thyroid 1" Uptake in Rabbits 14 Feces Collection 14 . . a

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