4.2 Data Reliability -------------+------------- 2 e- ee ee eee e eeeee 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 5.1 Conclusions-------------+----------------+-----------+-------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 eee 62 APPENDIX B DETAILS OF MAJOR INSTRUMENTS----------------------- 63 B.1 B.2 B.3 B.4 B.5 B.6 Aerial Radiation Detector, HASL TH-10-B ------------------------Altitude Compensator ------------------------+---------+-+--+---Telemeter, HASL TT-3-X -------------------------+----------Automatic Gamma Monitor, HASL TN-4-C-------+---------+-------Scintameter Survey Meters -----------------+---+---------------Gamma Spectrometer, HASL TM-10-A--------2--2 5220-222 - ery 63 63 63 63 63 65 APPENDIX C ALTITUDE ABSORPTION MEASUREMENTS DURING i PREVIOUS OPERATIONS- ----------++-----+-+-- once ee ee eee 66 APPENDIX D ANALYTICAL DATA FROM SAMPLES OF SEA WATER---------- 69 D.1 Surface Samples -----------+------------------+--+--+---------- 63 D.2 Depth Samples--------------------------------------------- 69 REFERENCES ------------------+------------- eee ee ee ee eee eee 76 FIGURES 1.1 Coordinate system of gamma radiation from a water volume -------------- 13 1.2 Radiation attenuation referred to h = 3 feet----------------+---------- 14 1.3 Determination of estimated outer boundary ------------+--------------- 15 * 2.1 Project 2.64 air control---------------------- eee ener er rere 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 ---------------------- ee eee ee ee eee eee 21 2.5 Energy dependence of dose rate response, Top Hatplastic phosphor ---------------- eer eer ree rc rr rte 22 2.6 Angular response of Top Hat radiation detector--------------- DOEARCHIVES 3.1 Summary of 37 pre- and postflight calibrations of Top Hat radiation detectors ---------------- rece re cr rere rere , 3,2 Radiation attenuation overland (Helicopter) ---------+-+-------------3.3 Radiation attenuation over land (P2V-5 aircraft) -----------+----------3.4 Radiation attenuation over water-----------------+ 2+ ee eee ee ee eee 25 26 27 o7 3.5 Flight pattern, Shot Cherokee D-day -----------------+----------e- 28 3.6 Flight pattern, Shot Zuni, D-day-----------------------+---------- 29 3.7 Flight pattern, Shot Zuni, D+1 day ------------------------+----ree 30 ° : a G