S26 PROTRACTED EXPOSURE TO FALLOUT Derwed quannines The & values calculated for each nuclide in the Rongeiap and Utunk adult populations B t la are : } piven in Table. 4. In the cases of the Rongelap and Uurik people for whom sequential bodv3 3 vs > . ° burden data was available. & was round to have va ee = So zee te s wiDig Se =} S238 a positive value for "Cs. *Zn. *Co. "Pu and “Sr The “"Pa data for urme of three adult a1 ; ““Pyowas cs . | oo ~ . oy. , re pL. 7S . x 107° +9) «1 Sa 7_ ' was not possibie. For the esumate of cumulated “Fe intake, A was assumed equal to zero which Teal == mS impues that radioactive decay was the onlk cause of reduced daily activity intake during residence. 3 | 2° _ . £3: be similar for both males and females as well as So: ; comparison, Where data were available for the values ee of *£ for "Cs and ™Sr : were foundto for residents of both Rongelap and Lurik. The yearly percent decrease in the atom ingestion rale was computed using equation (3) and the derived & value for zach nuclide of interest. This intake relationship shows a 9°, reduction in . . . + 1 . . dietary “Cs for each vear at Rongelap and GF =~» : 8s 52 2) = ' 7é*+ SPO Ll 82 £ | . 1 = "Zn and a 60°, per year reduction in dietary "Co were observed for adults. Also, for adult males at Rongelap, a tentative value of 32, per vr reduction in dietary >°Pu was estimated from Sparse data. ty. daily dai activity wity ingest; The derived quantity, ingestion rate on day of return to Rongelap (29 June 1957). was calculated for manyindividuals for $37 Cs and wasplotted as a functionofage in Fig. . . . 4. An example of the variation in "Cs values . for male and female intake on day of rehabitation is shownin this figure. Differences in the daily ingestion rate of stable elements at the Same geographic location have been shown to occur among subgroups of a_ population ( ICRP74). ). A As an example of the dietary 3 vari-3 : . ation at Rongelap, it was observed that coconut sap was used both as a major food supplement = > 3 5 | = | » ENN SENATE ‘ fSLE5 x x KX x & SSSSE x x MK x ;i | ¥ Seas TIT §fe8 = & 2 eeec | | ; : eceso ecco | | ee28e . . AaARS Cane ween Col op Ui ve ‘ ; REAE a SSSRS || yay S345 © Se enor es - eeene x XR KM onrmnm woe | HENS | ey : Seeoe | l ' i ' \ FRAKES Den Fees FTTts eses5 e5ee6 | @ ; SATS | S482 fo Nm - SESE x x x Mx eee SAS ree FSS22 tty hy #? > Utrtk. For dietary “Sr. an &°. reduction was = L i or for each v | an’ cone ink=. emacs a yearat Ronee "ap The. “Co an n intakes‘ were reduced rapidly o p ~ = : during the first few vears post-return to Rongelap Atoh. An 80°, per yr reduction in dietary . ! . £ ; £2 = . seers SSDS SAAS Sete - 7 = = } genre S£EESLI Kx x xX x x ns Seas as a result of studies by the BNL medical program (Bert: Co7S: thus an estimate of k a4 — b ) sa¢te F258 oN eS ee £ For “Fe. onis one bioassay estimate was published ' TET TITS ZEKE Eh ak x x xX x x EEaES ™ ms om um wl porenee a 2 PNNTS \ noo eof of ot SESsee eeeee = Es Bo males at Rongeiap in 1973 and !976 provided a singie tentative estimate ofk. The value of k for , KK Xx x om owe RONSA | | | | | SessS SSETS | € > gu gi Tet KAEXK & =zx Sia ie eesee Bxeee Paes eocie ke RSS dae ail ke j 24 37 |e _ere 88a p eB 2M an “ = 2 e =]=| zi t BITS" ~ | ~; 2 are Ng aoabo s q Veeoeen ZTEXX gEee 2 oss saene Pees =oa z2 9? oe By ped [ooexe 5 oSere OME~ Nw ta [ec eaRan Stsga “* 28 ~~ £2 ‘} i RE... 0oT EEE ' ,