TRANSURANIC AND TRACER SIMULANT RESUSPENSION 247 



10" 



10" 



> 



"D 



a. 



3 10-5 



Q. 



cr 



o 



CD 



lO"'' r 



CO 



< 



Q. 

 O) 

 LU 

 OC 



z 

 o 



10-' r 



10" 



t 



Site A 



_L 



Sampling height, m 



♦ 0.3 



A 10 



T t 



Site AB Site B 



I 



I 



200 400 600 800 1000 



DISTANCE FROM SITE A, m 



Fig. 8 Decrease with distance of total ^ ^ ' Pu flux on nonrespirable particles at Rocky 

 Flats. 



From a comparison of the data for the three different Rocky Flats sites, the 

 conclusion is that the airborne nonrespirable ^■^^Pu flux does not decay as a simple 

 exponential function of distance from site A. In addition, data for sampling heights above 

 1 m at sites AB and B show that the airborne ^^^Pu flux did not significantly decrease 

 for heights greater than 1 m up to 10 m. The nonrespirable particle plume height above 

 10 m is unknown. 



Similar results are shown in Fig. 9 for total ^^^Pu flux on nonrespirable particles at 

 Rocky Flats as a function of a sampling site and sampling height. The maximum 

 nonrespirable airborne ^^^Pu flux was 1.2 x 10~^ /nCim"^ day~^ and was at the 0.3-m 

 sampUng height at site A. Again, at site A as well as site AB, airborne ^^^Pu fluxes 

 decreased rapidly as the sampUng height increased from 0.3 up to 10 m. However, from 



