iii 4.3 Methods for Measuring Gamma Ray Emitting Radtonuclides , . . 4.3-1 Instrumentation and radiochemical calibrations for 241 am, 2076, , 15ey, 60, 226p, and V37c6 5. RESULTS .....2-.4.22-4 ee rr Radionuclide Distributions in Surface Sediments ......* @ © © © © © #@ © #© © © © #®» © @ - P] utoni um-238 e e 8 e@ e © @ © #© @© © #® #@ @ »© © «© © © © © © 8» # 8@ @ @ eo 86 © «© @ er # ©» © © @ © oe © © @ SONS wh — Americium-24] is] Plutonium-239+240 - AMNOanonn ur ° se 6 NANAK -1) ow 5.1 ce wn $ . od” Europium-155 Cesium-137 * «2... 2 ee ce he ee « © eo. &© © aoe Bismuth-207 and Cobalt- 60 a Ordering sequence of radionuclide concentrations by station ......-e. rr Uranium, Radium-226 and Polonium-210 ........ 5.2 Areal Distribution of Finely Pulverized Sediments 5.3 Distribution of Radionuclides in Sediment Cores 5.3-] 5.3-2 5.3-3 5.3-4 @© ..... ...... Crater station profiles... 1... ee e ew wees Northwest quadrant profiles... 2... 2.2. 2. 2 eee Central and eastern quadrant cores .....-.s+Uranium, Polonium-210 and Radium-226 ... oe 5.4 Total Alpha Radioactivity 5.5 Reliability of the Data ........-.0- 2s ee we ..... a 6. SUMMARY AND CONCLUSION 7, RECOMMENDATIONS... 2... ee ee we cee ee ee ew see LITERATURE CITED ......226. ec, ..... we ee ee A APPENDIX I . 2... 2 ew eee ce ee ee ee wee ce te we ww APPENDIX s Il APPENDIX III . e ° 2 s e e » « e e e oJ e ° e e . * < e o e e ° . e e e ....... se ee ew re