HN Now the next viewgraph (LRA-27) is a list of all of the other radio- Ww nuclides that we had previously considered for the lung only, and these are - the dose to the gastrointestinaltract. arranged in order of decreasing dose commitment. Plutonium-239 is essen- tially a trivial dose to the lung, and we've only done a few calculations forit forcompleteness. This gives us a total of 46 radionuclides that we have considered in these calculations, not counting plutonium. The next -yiewgraph (LRA-28) indicates an ordered procedure that we followed for’ these calculations in terms of where we get the air concentra10 tion data. 11 available as our first choice, mainly because of the important input that 12 gives us in terms ofparticle size and thus entry into the lung dynamics 13 model. 14 that 15 made and reported in the literature, so from PLUMBBOB on all we have is the 16 high volume sampler data. 17 assume that the activity median aerodynamic diameter was 10 micrometers, 18 which is probably quite a conservative assumption, at least in terms of a 19 lung dose; perhaps not in terms of doses to internal organs. 20 . ‘Wehave always used the cascade impactor data where it was Now if we don't “have a cascade impactor data, and you may recall after TEAPOT there were “no cascade impactor measurements generally In that case what we have typically done is to Now if we have neither of these kinds of data available, what we have 21 done is to use data from the closest town that did have such data, 22 we've simply ratioed the activity measured there according to the mR/hr at 23 the two different locations. 24 So the next viewgraph (LRA-29) indicates again what we've done. and Where 25 particle size data are available, this is no longer reatly proposed, this 26 is what we did particularly for the litigants. 27 less than 20 micrometers, we would use the ICRP lung model directly in 28 terms of entering it. If we ever- found a diameter This has never been the case where we have an aero- 4]