CONTENTS ABSTRACT ° <--e rere er ne ner eee ne we en en eee - 5 PREFACE --------- ee ee ee eee G BACKGROUND AND OBJECTIVES ~-- ------- + -- 22 --- ee ee ee ee eee 9 PROCEDURE ------- wt re nr ee nn en nn een een ee 8 Objectives ot the Laboratory Studies ----------------- +--+ eee General Character of Bioldgical Samples - ~-------------~------+--~-+- 3 9 Classification of Organisms -~------------+----------------- e+e 10 Characteristics of the Sea Water Masses Involved ----------~--------- 10 RESULTS --~------~-------~-+------------------ +--+ e+ 16 Gross Beta Activity Measurements --~~-------------------------- 10 Beta Absorption Analyses -~- ~-- --- -- steerer ener ncn rere 10 MN Beta Decay Characteristics ---------------+---------------~--- 10 ° Gamma Spectra ~~ -~- 3 eee rr rr rt rrr rr en rere 10 Radiochemical Analyses --~-~-~------ 3 - e-em errr nen rene 11 State and Size of Fission Particles in Sea Water ---~----3 rere rene 14 DISCUSSION --------+-------------- 2) eee een eee ne ee eee 15 e CONCLUSIONS +--+ - 7-2-8 nnn en re nnn ne nen en een ee ne eee Ww REFERENCES ~~ + ~ - oo oe eo nn ene nn ne enn ee ee eee - 18 FIGURES 1 Beta-absorption curve +--+ ect te ee nn er et rr nm rere ene ik 2 Beta decay curves ter mm rt ter re et te tr nnn rr ene en 12 3 Gamma energy spectra ~~-- - ee ere ere errr rrr te TABLES 1 Beta Aciivities cf Organisms from Castle -<-<----e--- 2 -re nn - woren if # Analysis and Comparisons ~~ --- tert tt re en renee rr ren 15 3 ‘Lhe Physical State of Fission Product Elements in Sea Water Following an Underwater Vaporation --~---- ect t crete tren 6 16