PPT Slide

Uranium and Radon Source Terms for the FMPC

for 1951-1988a

Source Median 5th percentile 95th percentile

U to Atmosphere

Primary estimate 310,000 270,000 360,000

(Alternative calculation) 284,000 130,000 720,000

U to Surface Water 99,000 85,000 120,000

Radon to Atmosphere

Primary estimate 6,300 TBq 4,100 TBq 8,500 TBq

(Alternative calculation) 3,200 TBq 540 TBq 11,000 TBq

Radon-222 daughtersb 4,800 TBq 3,200 TBq 7,000 TBq

a Values are in kg of uranium, except releases from the K-65 silos which are reported in TBq.

b The release quantities for decay products are quantities of each of the short-lived decay products, polonium-218, lead-214, bismuth-214, and polonium-214.

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Notes:

This slide shows our final estimates of uranium and radon released to air and surface water. Uncertainties are also shown. Although the amounts of uranium released are quite large, it is the radon that causes most of the risk, as will be shown later.