CONTENTS
ABSTRACT - ------------------ -- or rr rrr rrr re
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FOREWORD --------------------- 7 - rt r r
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CHAPTER 1 INTRODUCTION------------------ 7-7-7 eo renee
1.1 Objectives----------------------- ere reer terete ee eee
1.2 Background --------------+--- er e e ee te eer eo
1.3 Theory ~ -------- er re ee rr rr rr rr teen
1.3.1 MInitial-Gamma Radiation ---------------------+----- eee
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1.3.2 Residual-Gamma Radiation ~-~-------------+---------- 14
1.3.3 Absorption in Air------------ we ce re re ee renee 15
1.3.4 Hydrodynamic Effect --------------- eee ere er re ere 16
CHAPTER 2 PROCEDURE- ~-----<---- rrr rr rr rr rrr rrr rrr
g.1 Operations ---------- -------- - ree or ee rr re errr eee ene
2.2. Instrumentation - ----------- err er ee tee eer ree rr re ere
2.2.1 The Residual Instrument System, Conrad I Detector ------~---~-2.2.2 Residual Instrument System Recorder -------------------2.2.3 Initial Instrument System, Gustave I Detector-----------~---2.2.4
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Photomultiplier Feedback Circuit, Initial Instrument
System - -------------- ee re ere err rt rt rene
2.2.5 Calibration -----+----+- 2-2-2 ee ee ce ee ere ec err ere cn
2.2.6 High-Range Initial~-Gamma Station Calibration -------------2.3 Readout Error and Accuracy of the Gustave and
Conrad Svstems - ---~----------- sr er rrr re cre
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2.4 Beach-Ball-Radiation-Detector-Telemeter Unit----------~------- 26
2.5 Thermal-Radiation Detector--------------- re rr rt tt ert 27
CHAPTER 3 RESULTS AND DISCUSSION ------------------------ 28
3.1 Residual-Radiation Measurements- ---------------- ert rrr 28
3.2 Initial-Radiation sleasurements ----------- ere rr ert 43
3.3 Beach-Ball Measurements - --~-------------- rrr rrr rrr cre 49
3.4 Thermal-Radiation Detector- -~----------4- 76 cr re rr rrr 49
CHAPTER 4
CONCLUSIONS- - ------------------------- 27+ eee 52
4.1 Residual-Gamma-Exposure Rate~---~---------7 rr rer rrr 52
4.2 Initial-Gamma-Exposure Rate ~----------3 errr rr errr re 52
4.3 Beach-Ball Operation ----------------Pe eee eee eee eee 52
4.4 Thermal-Radiation Detector---~+-~-----+-------- oer 52
4.5 Recommendations- - --------+-------- 7 erect rr rrr rnc 52
REFERENCES - - - - -------------------------------------ee- 53