74
BPFECTS Of
NI?
“SO,
On the basis of ui is-nined iptake of 2) per
vent per 2! hour. tue iatesrated dose to the
thyreid from 17 ona ataer shorter lived od.»
isotopes was calor tated oy the DSNRDE, to te
about 100 rep.
The Lovsh nas estimated tia
this dose was about Po cep
for Rongelao sraye
and 50 rep for the Americans
The
differing
ueproaches
used
by
the
USNRDL and the LAST. for estimating the
body burden gave result. «hich, except for
Bal’. are very close
The mean bod
bardens of the tudis teu
nuclides presenter or TPabe oi were caleubited
for the Longelop oie Values foe
Aghnginie reap were Upproximatery
tue
aif
those of the Ronzelen group. and ssitues fe
Americans.
wbou
Rongelap group.
ne fourty
those
ono
the
The totai amount of rodonuetive rarer
present in the Gr. 7 tract atene diay post detor 4
tion in the members of frroup Twas estinaterd
as approxmiately dome. “Diis activity was cor
tributed chiefly by isotopes of short radiologic:
and biologieal lia fo] fe and |omited solutiuiiny
Thus the levels ot acti ty
body were relatively
of radiorsotopes
it
permod
6
fe not:
ss
compared to the part
doses of I)
as prepan
choemutter
followsexeostre
dose to the thyreid
detopanicn
tue crime ol most ss
<i te sohible
the most dinzardot sa
early
The concentratie:
sontis post
was barely detect ule
posed individuats
Todine, which
a the tissues of the
bow
a
i tere
rt
4
lie
qopreciendes tac
He
oor
rotaily
Vuattenpt to measure bone-tixed radioactive
sytem bv mneans of sensitive tilm badges taped
elow he knee, over the epiphysis of the tibia
oo. pun her of persons, vielded no positive
estilts
So correlat.on could be obtained between the
jegree of miternal contamination and the clini-
iin hematological findings.
fe possbilit,s that chronic irradiation etfects
vr coeeur ts quite small, Thus, an evaluation
tthe dara on the internal contamination, indae that of Srey leads to the conclusion that
ue internal hazard to the contaminated inhabiasf tae Marshall Islands is minimal both
Soon toe secure and the long range point of view.
> 4!
ison product= were adsorbed mainlyon fairly
cre particles, The matertal was 10 percent
obible a water. and completely soluble in acid.
Interna: deposition of fission products rewired fromaunhalation and ingestion of the fallmtrnateral fangestion appears to be the more
miportint of the two routes of entry into the
ody
The activity in the air settles out fairly
audd) out contaminated food, warer and
eastis retain their activity for long periods of
lhe amount of fission products reaching the
roodstregm toreugh the respiratory tract ts a
meting of particle size and solubihty of the
Atone lay post detonatia i ss
ternal hazard,
The present stay 0
utaim
ootent i
the oliser
Invade da andmad oe wper ues thea mosr
aie:
ft
radioactive eleme its fe med on tester 1
ove
as Che fissile mite ty
elt. e tot rend yoy!
sorbed fron theo raps
ped teeta
Tosr Bacand oa tewoat ct
were absortecd ter
og
ot
Pty aer
ca ee nett
tT
poe
ede gee:
Leerree
Source of Internal Contamination
The farlow material consisted largely of
alovamn oxide and calcium carbonate. The
beats.
wis crlenlated te he gener the uraxeauir cee
missible level 65
fer oa sq aebide
Nt bare
times following expost ie. toa tonger dyed
ston product presenp. foe are fest
In view of the
snort anlf-life of the most abundant fission
rmodamets deposited internally in this situation,
hype
usedoatherips of byperthyresdisr
oreareinoma.
RADIATION
bioorie conpinunants. The particles with
Srch The eTavity was associated were conaerably larger than the optimum size for
mpestior on the alveolar tissue of the lung.
Plas the orebability of the retention of inhaled
Crborne contamination wis not appreciable
ere fhe exposure period
Tlie bvoothesis that imgestion was the chief
cor eof anternal confumunation is supported
2
oe ding that the gastre-imtestinal tract,
Poconen sad the liver of autopsied chickens
pout taht
ae deed atearly catervals following