L
ah
deansaie f
pratably related ta tae iact wb clonaig feos pri lky
cn sluwnc ca eheen
have low levels of activity.
ke
.
es
The beta-to-j;;amma ratio (a3 determined by the meth16d used here) in
whole fish varied considerably but was approximately 1:2 in most of the
. Specimens analyzed. This is in contrast to the 1:4 ratio observed at one
year post-detonation. This ratio 1:2 is approximately the ratio of the
beta-to-gamma activity of 20%, the principal radionuclide found in fish,
Physical and radiochemicz: analysis of a number of fish indicated, as
previously noted,’ that the high gamma-to-beta ratio was accounted for by
the gamma from the induce?=activity, zn,
So
Ee ne tm
+. =e TPS,
aea
The head contained an average of 30 per cent of the total
PER ee. eee
beta and 21 per cent of the gamma activity. Muscle contained approximately
14 per cent of the total b:ts and gamma activity, The activity of the viscera
and contents varied considerably but contained on the average about
33 per cent of the total beta activity and 16 per cent of the total gamma
activity. The remainder of the activity was found on the skin and gills, The
internal distribution of activity, particularly the muscle activity concentration, was very similar *. :hat found in the fish coilected and analyzed at
one year post-detonaticn,.
ns
mg ee eeai
The results of the rad'schemical analys?s for specific radionuclides are
presented in Tabte ood Pre most important finding is theary high percentage of the tctal acti ‘ty in fish which is cortvibuted by Zn®5, The
manner in which this incuceé activity is concentrated has not been determined. The Zn®* in fisa is distributed fairly evenly among the various
tissues. This contrists witthe 0eae 1 of 2n°? in the Hver of mam-
mals following ingestion, The Zn®* was not found in clams, crabs or snails,
with the exception of cne helmet snail from Vabelle Island,
The rare earth group of fission products constituted a small percentage
of the total beta activity in clams and fish, The rare earth elements as
a group do not azpear to be selectively iccalized, The rare earth activity
of the crabs was high, in average of 2!) er cent of the total beta activity.
Snails concentrated tne largest amounty of race earth elements,
The Sr” concent=:! finowtr very le ,
myo t
of ! per cent of the totai beta activity,
7
;
az
‘
lg
(Table 4.2),
Ty ey cen 5: ~~
te Nie et ee ee
The internal distributior of radioactivity in the tissues of fish (primarily
carnivores) collected in th: various lagoons indicated that an average of
20 per cent of the total 5::. and gamma activity was found in the skeleton
Boe we
Lee te ae
*
vette naeAL es,
Sete
a
Ot en a dive,
“Sie tn sasttling
oR a eR Oe eR A Si ee eeA ee ereaySabONE en et mee oe dpe
were ee
ttriiectfag conerally a fraction
vetbritettag
‘fae Sr’ee ene particular
ard panes Since itis the radicnuctice of greatest potential Tene
The
° hazard derives principaily fror ica long radioactive half-life (26 yr)
ond also ore its high fission yield and its availability to biological organisms, Sr’ activity and sunshine units are reported for a number of sam-
ples in Table 4.3.
cree
eTPA
wt
TMA ere we
a
se
ee te
Yt
Mogae
fers
4
Re ea
:tape gt
ue
pg
PPR
ree me
de
aot ye
ee
wt
Fe
ge ene ee ecaegteemm ee
ape ome eS ae ke
:
Bm pitaa
he be TTR SR GB POP
is Dh a
7
sods
aa
te
to