4.2 Data Reliability -------------------------------------------- 55 4.2.1 Isodose Determinations- -----------------------------+-+----- 55 4.2.2 Contamination-Density Determinations ------------------------- 56 4.3 Distribution of Contamination in the Sea---------------------------- 56 4.3.1 Stability of Contaminated Area ------------------------------- 56 4.3.2 Estimates of Total Fallout- -------------------+-------------- 57 CHAPTER 5 CONCLUSIONS AND RECOMMENDATIONS -------------------- 60 3.1 Conclusions----------- wor ee eee ee ee ee ee ee ee ee ee ee ee ee ee eee 5.1.1 Altitude Absorption -------------+---+---~+----------------5.1.2 Fallout Distribution - ------------+----------+-+-------------5.1.3 Material-Balance Estimates ------------ --------------+----5.2 Recommendations- ---------------------+--++------+-+---+------- 60 60 60 60 61 APPENDIX A DERIVATION OF ALTITUDE ABSORPTION OF GAMMA RADIATION - ------~-------~------- +--+ ee ee 62 APPENDIX B DETAILS OF MAJOR INSTRUMENTS----------------------- 63 B.1 Aerial Radiation Detector, HASL TH-10-B -----------~---+------------ 63 B.2 Altitude Compensator ---------------------- eee eee ee ee eee ee 63 B.3 Tclemeter, HASL TT-3-X --------------- +--+ eee ee ee ee eee eee 63 B.4 Automatic Gamma Monitor, HASL TN-4-C-~ --------------+----+------- 63 B.5 Scintameter Survey Meters ----------------------- ee eee een ee 63 B.6 Gamma Spectrometer, HASL TM-10-A---------------------------- 65 APPENDIX C ALTITUDE ABSORPTION MEASUREMENTS DURING PREVIOUS OPERATIONS- - -------------------------+----- 66 APPENDIX D ANALYTICAL DATA FROM SAMPLES OF SEA WATER- --------- 69 D.1 Surface Samples -------------+----+---2------- ee eee eee 69 D.2 Depth Samples--------+---------+--~------------ +--+ +--+ 69 REFERENCES - ------------------------ 22-2 eee ee ee ee ee eee ee eee 76 FIGURES 1.1 Coordinate system of gammaradiation from a water volume -------------- 13 1.2 Radiation attenuation referred to h = 3 feet----~-----~-----------rr rrr 14 1.3 Determination of estimated outerboundary ~-----------+3+ +r crc rrr rere 15 2.1 Project 2.64 air control- ------------~--- rrr terre rts 18 2.2 Communication routing, Project 2.64 air control ---------------------- 18 2.3 Radiation-survey-equipment mounting locations in P2V-5 aircraft ---------- 20 2.4 Aerial-survey system - ------------- 3-2-7 rrr rrr rrr rrr rcs 21 2.5 Energy dependence of dose rate response, Top Hatplastic phosphor --------------- rrr rrr rrr rrr 22 2.6 Angular response of Top Hat radiation detector -----------7- 7-777 errr 22 3.1 Surimary of 37 pre- and postflight calibrations of Top Hat radiation detectors -- -----------~ err rrr rrr rrr rr rrr 25 _ 3.2 Radiation attenuation over land (Helicopter) ------------ 7-5-5057 errrrn 26 3.3 Radiation attenuation over land (P2V-5 aircraft) ---------------------- 27 3.4 Radiation attenuation over water -------------------- ree rr rr rrr 27 3.5 Flight pattern, Shot Cherokee D-day -----------------r rer ctr ctr 28 3.6 Flight pattern, Shot Zuni, D-day-------~----------- rr rrr crt 29 3.7 Flight pattern, Shot Zuni, D+1 day---------------7- errr rer ttre 30