Serraad Discussion of eS or Wath ote Sante thsAptenmus’ om elwetsss. x by db at, tab fe , from th: ting of fallout until the time of evacuation it is expected that personnel will (See Criteria II.) bs kept indoors. Major lesses cue to weathuring can not be relied upon during this period, so that the estinst<c factor 4s 1/2. From the time evacuation could have been accomplishid until the Gors time of estimated ruturn it ig assuned that personne] wild bs about half of each 24 hours and that major losses due to secthertne can not be relied upon. The over-all factor is thus 3/4. The save reasoning applies to the third period of time, i.5., from essuned tine of return to 15 cays after fallout. Fron 15 days after fati out vwntail one yerr Jater it is ssevinated that the attenuation due to bolldines end th: effects of weath slug will yield an over-all factor of 1/2. se rate readings have been taken with survey meters ovicide end inside of houses esround th: Neveda Test Site efter Sallout occurred, The ratio of rendings varied with the tree of construction of ths heuse end with the lecation within tho building, Generaliy., (os; rati 7. of readings outside to inside a frame house was about 2/1 1 grcater differencs for masonry construction. A limited mmber of filn insid: of some houses Snapper and elso UschoteKneithols, . . awecye + wh 2 SOmsUr.. during Terbler~ T ~ in the first case, the di:fer qua badges Were placed outside and a Woe only about a 20% difference was noted. In fact, in one case during Upshot-Knothole the film badge inside read higher than outside. The emertee o in total doses was again 2 to 1 or greater but during Upshot-Kncthole aa during future operations. i a ne differences between these experimentsl data will have to be investicated