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tabitios as lathe earresstnesa cf tee rerpabizing facior and the a$ev str): -a that the mara alizing
factor iv a comtam. Th ts
onmot fe this intter assumption that thaod rate eames at
e2ck lorstion bs etuabiy tritazuced by all exterior souree geometries.
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’ The second ganeral method af estimating lagress doee rates ciserssed in Sectiaw 2.2.3 wan
the conversion of material excieztion merascrements ig duce ratce2z. Yire basle measuccs: a2
required to eatimate the Cova sis Cua to alrhers.2 radicoctlve material is the determinutina of ©
airborne inaterial convestraiions a3 a function of time.. The lime ci rinrt of intale 0; was
estimated from gamma dota aut the tims when sampling stopped was kooen It was souvetd ©
thet the influx ci material exs insianlanecus and complete al rime t,, 2nd that therea&er the
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atrborne concemrailois were reduced only by cahaust end dilution with clean atr.
The equation far conversien of airborne cercentrations to Core rates is given ia Apeeatlin A
based on the celorraination of the dose rates at the cen.>: of a uphete shose volume is cecal to
the compartmert volume and the zssumpticz that conceziratioas of rcaterial are uaiform Usrcughout this volume. This eqration was modified to include the apbronpeation piven above fur azportioning the sample colcetioa as a function cf time and {8 also derived In Apperdin A. Twitch+ air Sainple weasurcments vere in terms of finstons, and the egiaticn ta:
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collected a3 (otal sampirs fer a 2-hoar period. Therefore, rates of coliection had te te 2pproximated, which togecher with known-air sampler flow rates could be used to popreziaste
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the concentratie: of airferne.caterial'as a fuaction of time. The air sam, es cotnined vere
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