“One Curie (Ci) is 37 billion dps, so we’re talking about 2*10E+6/37*10E+9 = 54 uCi. But there is no mention of surface area, 54 uCi/?, m^2?”
My guess is that 2 millions dps is a peak value. If that’s the case, then my estimated dose rate of 120 mRem/h is way too high. I’m assuming 54 uCi/m^2. If the 54 uCi is a peak measurement, that’s the highest surface contamination found 25 miles away, as measured directly over the detector. Then the average dose rate in the area is most likely very low, <1mRem/h. Sounds like an exaggeration to scare people, typical hype in the media.
“One Curie (Ci) is 37 billion dps, so we’re talking about 2*10E+6/37*10E+9 = 54 uCi. But there is no mention of surface area, 54 uCi/?, m^2?”
OK, was finally able to watch the video, it was 54 uCi/m^2. My estimate of 120 mRem/h is very generous. The dose rate is most likely much lower, 120 mRem/h is an upper limit. Using 10,000 cpm/mRem/h gives 1.2 mRem/h, depends on the isotopes. I used a very rough estimate.