My max estimate is 195 TONS of Uranium, and it may certainly be less based on assumptions made, but the bottom line is that a huge amount of Uranium was exploded and aerosolized.
The quantity of tons aerosolized can be estimated by using official Government data, in particular Exhibit F-1 which is a 4/5/2011 publication of the EPA Radnet. Their website is very complicated to navigate, and I can no longer find this PDF file on their website, I have archived a copy to my computer.
Exh F-1 Shows 130 aCi/M3 of URANIUM in air, in Honolulu, with similar amount in Kauai, and even more in Guam.
The “Background” amount of Uranium in Air in Honolulu is around 5 aCi/M3, thus making the measured Uranium 2600% higher than Background . See Table 9 from the EPA for this data.
Using a dispersion simulator, printout attached as Exh G-1, and with help of Google Earth (Exhibit G2 and G3) I calculate an affected area, which is about 2800 miles by 4900 miles.
Here is the simulator.
Now to make an estimate of affected volume of air, we need to select a height, I selected 8 miles.
The meat of the calculations are on Exhibit C-1, which is the next page
195 Tons Of Uranium!
Lets do a sensitivity analysis on the assumptions. What if the affected area is 50% of the size the simulator shows, then use a multiplier of 0.5.
What if the height of the affected air is only more like 2 miles instead of 8, uses a multiplier of 0.25
195 tons *.5*.25= 24 Tons (Conservative Estimate)
Under the Conservative Estimate, and using .89% Plutonium per Table 1, this would be 433 pounds of Plutonium aerosolized.
Truth is not the friend of Nuke,No wonder this stuff has to be covered up.