United States Atmospheric Nuclear Weapons Tests Nuclear Test Personnel Review Prepared by the Defense Nuclear Agency as Executive Agency for the Department of Defense CHAPTERS: 1 INTRODUCTION 1.1 Historical Background of Project TRINITY 1.2 The Project TRINITY Site 1.3 The Project TRINITY Organization 1.4 Military and Civilian Participants in Project TRINITY 2 THE ACTIVITIES AT PROJECT TRINITY 2.1 Preshot Activities 2.2 Detonation and Postshot Activities 2.3 Activities after 16 July 1945 3 RADIATION PROTECTION AT PROJECT TRINITY 3.1 Organization 3.2 Site Monitoring Group 3.3 Offsite Monitoring Group 4 DOSIMETRY ANALYSIS OF PARTICIPANTS IN PROJECT TRINITY 4.1 Film Badge Records 4.2 Gamma Radiation Exposure