ANT DPSCrO prs The estimated carat) ns of fatlent wre result from the above ¢strigeatier ot ran. fallout rate for (iroup oan [EL appear os long to have oeeurey a tle dustarne yt these people from the net ~ aid osbipte be wind velocity in the rea was bigh ona! to move the clona oo er considerably shoiter tome che islands i oe aitie as nor half of the above anedicuted © ne The accounts of tae oi traty of tue fatlo. ty although conflier ng 8 bet ndi emt) se late cessation Doses calculated ono a org tallow eonstan rate of increase ivpofiesix are lower tha those due to a shor ‘about slnee a shan? fallout quickly aepesi - mee amon a! Por beth oor ot wear abd ™ ot vue activity. fallout assumptieth i sane callie Wars oe et mated The ranzes a tthe ous ollows SPOSE Y GROUPS ~ FN hoo Vamk atoll Grroup PV. only a fallout ite of abou’ 12 hours or less is consistent with the ater dose rates observed, provided (+ fallout actually began as late as was -stimatec from wind and distance factors. » cen fallow probably would not be umformls heavs throughout, the first portion seettior EP bbe Most intense and the balance dereusing vith tume The total phenomenon wold thus rend toward the effect of a norter fallout This is supported by moniot data from. other nuclear events. where ratuulv Seavey fallout is reported to produce .ooeak oO alr-borne radioactivity soon after umisai, with the airborne activity level then iverpusipy The latter part of the fallout. Nougy still detectable as dust, may then oroduece only a small fraction of the total fase ‘ropa miatertal on the ground. Hence ra total dose may be estimated fairly ae- Lately bs assuming a constant fallout to omplete in a much shorter Fe ery raves Tee ye) time Sie dose values given in Table 1.1, based on Pook No: Path oo" ME she Rongelap (Giraip | Ailinginae Ciro ps | Rongertk 'Girouy i 7! Utirik iCrroupe + ya an 1h 2 ()ooniidyve., meter and monitor data, are con‘tent with a constant fallout hypothesis of ahr 2 V2 ‘Nhs ~ nous etfeetive time. ‘ ()ne exception toute: he dose vidues for Grroup LIT are about tontg* peaeettofthe 12 hour fallout value, averaged soy oane O+ hour exposures, This was felt Xpress most accunutely ‘he average air dose On Rongertk ‘Giou, [| nose readings were ob nine ati: only dareet eviddenee © tod alta odes ‘itistil life ope t dha clase SET, badges worn bott auteoo sag peideheut eonstructed burdinges 9 about 50 to Hs ile ots mained outdoor over chs read 98 ro Ane ber +e ‘sah “HA badd wenger ts 4 tte pete croup. ft Dptdges ene Indoors inside a steel otro ater read oN These dose values eooressn go ometet eonditions but ans de one ta sciebelne and attenuation facoot~ aoe consistent are: the assumption fiat toe des. outside a) cine the first YS A hieurs tte cu peut the fallout coprespeerne cer cs pteur bP ayy of constant falle oe soe ved by personnel who spent roughly half eorotdpe doiside structures where the dose rate vee fore ta be coughs half that out- cag On the other islands such shielding was toasaratbye cape 2 5, Hoot VIustrates the cumulation of oatvdose as a fraetion of time after deto- Fie! The cose rate varied continuously. eo cijar oart onoof radiation was received at oourher cose oite prevailing in the early por- Hoot toe eXpesure perrad. Ter eet Tw the time that 2 bors cebiti is resmifis cao values which ire dpe ttre he pe. Py ated pods of “Pable Plo bw 3 te bb or, Table 11 adendated before sdb speeccum detta certainey ba aib the informacion is cifferener wea ds meglected