PROJECT TRINITY 1945-1946 by Carl Maag and Steve Rohrer United States Atmospheric Nuclear Weapons Tests Nuclear Test Personnel Review Prepared by the Defense Nuclear Agency as Executive Agency for the Department of Defense Destroy this report when it is no longer needed. Do not return to sender. PLEASE NOITIFY THE DEFENSE NUCLEAR AGENCY, ATTN: STTI, WASINGTON D.C. 20305, IF YOUR ADDRESS IS INCORRECT, IF YOU WISH TO BE DELETED FROM THE DISTRIBUTION LIST, OR IF THE ADDRESSEE IS NO LONGER EMPLOYED BY YOUR ORGANIZATION. Since declassified CONTENTS: LIST OF FIGURES LIST OF ABBREVIATIONS AND ACRONYMS REPORT DOCUMENTATION PAGE FACT SHEET PREFACE 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 REFERENCE LIST LIST OF FIGURES 1-1 Location of Alamogordo Bombing Range 1-2 TRINITY Site and Major Installations 1-3 Tent Used as Guard Post at Project TRINITY 1-4 Truck Used as Guard Post at Project TRINITY 1-5 Organization of Project TRINITY 2-1 The TRINITY Shot-tower 2-2 The TRINITY Detonation, 0530 Hours, 16 July 1945 2-3 The South Shelter (Control Point) 2-4 Inside One of the Shelters 2-5 The Base Camp, Headquarters for Project TRINITY 2-5 The Base Camp, Headquarters for Project TRINITY 2-6 Project TRINITY Personnel Wearing Protective Clothing 2-7 "JUMBO" after the TRINITY Detonation LIST OF ABBREVIATIONS AND ACRONYMS The following abbreviations and acronyms are used in this volume: AEC Atomic Energy Commission DOD Department of Defense LASL Los Alamos Scientific Laboratory MAUD [Committee for the] Military Application of Uranium Detonation MED Manhattan Engineer District R/h roentgens per hour UTM Universal Transverse Mercator REPORT DOCUMENTATION PAGE SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered): UNCLASSIFIED