PLUTONIUM-BEARING PARTICLES FROM FUEL REPROCESSING \21 



TABLE 7 (Continued) 



*The percent of the positive analyses less than, within, and 

 greater, than one geometric standard deviation of the global 



geometric mean enrichment factor. 

 tEF < EFg/sg. 



|EFg/sg < EF < EFg Sg. 



§EF >EFgSg. 



physical size. The size of the particles was not measured until after the particles had been 

 mounted and the polycarbonate film containing the tracks dissolved. Thus the size 

 distribution of the analyzed particles is indicative of the size distribution of particles in 

 the aerosol carrying most of the plutonium. 



Cumulative frequency plots were constructed for particles from Systems I and II. 

 Particles in each system were first ranked in order of their approximate diameter (in 

 micrometers) from the smallest to the largest. A list of the number of particles with 

 successively larger diameters was made. A cumulative total of the number of particles at 

 increasing diameter segments was calculated and then normalized by dividing by the total 

 number of particles from each system. This gave the fraction of the particles having a 

 diameter equal to or smaller than any particular diameter. Table 8 lists the particle 



