tne iikini Tsiana options. Living pattern. cheretore, .e ineu .as more Lana@iaticn rate Loaaging cf in cci.éa. . Tass 190 ~z/m° is at the aign flemabilicy for totentiali exposure “12 end cor the cpserved range icr normal otner pathways without exceeding cpen air zerosol measurements. fFed- era. tuideiines. ever, since local resuspension creara2d in tne immediare vicinity of an indi-~ TNEALATION FATHWAY “idual during nis normai acrivities ae “ao air sampling data were taken during the 1975 Bikini survev. Jpen is Drobabiyv greater “nan open air measurements, it appears reasonable, fieid aerosols were measured to some for lack of specific <ata, extent previously ac 3ikini aroil. 2??? higher number. 3ecause orf the sparsitv of data. -ow- concentrations in the surface soils ever. and aiso the lack of data cn =o use the 2 3 The average 739,240, 9 to = em) of Bikini and fneu Islands resuspension processes in the aroil are 2.3 and 1.4 pCi/g, respectively. envir- The oCi/day intake resulting from the tions ant, the average concentra- Pu in the soil were used ina mass loading model to predict the doses via the inhalation pathway. above model is, therefore, 9.019 for Bikini and 0.0028 for Eneu. The doses resulting from inhalation This is the same approacn used *9 of 7412405, are listed in Table 10 evaiuate the inhalation pathway at the three critical organs: Enewetak Atoi1. 72 and. liver. The mass loading concept may be ‘cr ‘lung, bone, The doses predicted on Eneu are, of course, ‘ess than those more relevant for estimating the oredicted on Bikini Island. cot-ntial cose via inhalation than doses will be compared beiow with bone ope and whole body dose from other pathways. «ir aerosol measurements because the resuspended material created by a These Two other isotopes must be consid= person in his own immediate environ- ered in the inhalation pathway — 2415, ment may be significantly greater than and 241sn, is reflected in open air measurements. in the soil on Bikini and Eneu is Therefore, approximately 10 times that of it is assumed that the con- The concentration of 2414 centration of Pu observed in the sur- 239,240, 3 However, because of low face soil at Bikini and Eneu Islands energy beta radiation (0.021 MeV maxi- will remain the same in the respir- mum) and a much shorter half life able, resuspended surface material. (14 vr) the integrated 30-, 50-, and In addition, a mass loading of 70-vr doses from 2415, are more than 190 g/m and a breathing rate of one~tenth less than those listed in 29 -/da were used to develop the Pu Table 10 for 73942505, 5 ag