TRANSURANIC ELEMENTS AT BIKINI ATOLL 567 



100 pr 



Mill 



- D-6 (2 m) 



c^ 10 



u 



Q. 



Q- 



0.1 



100 



B-3 (A)(2 mi 



B-3 (16 m) 



B-3 (29 m) 



B-3 (B) 

 (16 m) 



II I ll I I II 



B-32 (B) 



(2 m) 



B-32 (32 m)- 



4 



4 



4 



4 



4 



4 



AI2O3 BED NUMBER 



10 





3 

 Q. 





0.1 



I II I 



B-32 (A) 

 (2 m) 



1 — 



I I I I 



B-32 (2 m) 



S-1 



I I II 



B-32 (2 m) 



S-2 



B-32 (2 m) 

 S-3 



B-32 (2 m) 

 S-4 



B-32 (17 m) 



40 2 40 2 40 2 40 



AI2O3 BED NUMBER 



4 



Fig. 17 Concentrations of plutonium sorbed on Ai2 03 beds from BLVWS samples 

 collected at Bikini Atoll in 1976. ., extrapolated values for soluble activity. •, activity 

 measurements. 



slope occurred in bed 2 for the high-salinity samples. This effect was not observed at the 

 lower salinities. By extrapolation back to the first bed, the colloidal fraction was 

 estimated. For plutonium the colloidal fraction of the total averaged 15 ±3% with a 

 range of 1 1 to 1 7%. 



The BLVWS collections of 2 3 9,2 4 op^ -^^ water samples collected in July 1976 at 

 Bikini Atoll have been evaluated to determine the fraction of the total concentration 

 present in the colloidal state. The colloidal fraction has been determined, as before, by 

 extrapolating the amounts of 2 3 9,2 4 Op^ ^^gllected on the second, third, and fourth bed 

 to the first bed, as shown in Fig. 17. The least-squares regression line with its error 

 through these data extrapolated to bed 1 gives the soluble fraction in bed 1. The 



