401483|
BODY BURDEN or 13’cs AND THE RADIATION DOSE OF
A POPULATION GROUP IN FINNISH. LAPLAND
Tua Rahola and J.K.Mettinen
Department of Radiochemistry
University of Helsink1
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ABSTRACT
"
Higher radionuclide contents in the biota of Lapland than in that of
southern Finland and other non-arctic areas have been observed, despite
the obviously lower fallout deposition in Lapland.
Since 1961"the
Ss
body «burden of Finnish Lapps has been estimated by using a mobile whole-
body counter.
These measurements have been performed every spzing but
only two times elso in the autum, in 1962 and 1969.
A change of seasonal
varlation is nownoticed and reported in this paper.
The average maximum whole-body bunden of the highest exposed sroup of male
reindeer herders was found in the ‘year of maximum values, 1965, to be
1.5 uCi, while the highest individual value was about 3 uCi. In March 1969
the corresponding values were 0.52. and 1.1 pCi, in September 1969 ~
:
0.45 and 1 2 pCi and in March 1970 0.49 aid 1.2 uCi. The autumn value of
the male reindeer herder group was now 84 per cent of the spring value
while it was in 1962 61 ner cent.
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The annual radiation dose of reindeer herders from 13Togwas in 1969 about :-
60 mrem/y. ‘The integrated dose to the present generation of reindeer herders
(1955-1985) is estimated to be about 1 rem/30 years, if no major changes in
the fallout situaticn will take place. The dose from other artificial
fallout nuclides will be much smaller than this. For southern Finns the
dose from 13’cs is estimated to be 0.025 rem/30 years. An estimate of the
total radiation dose to be delivered to the Lapps between 1955-1985°2 gen
The dose commitment to this .population from the natural radionuclide
is exceptionally high, of --the order of 3 rem/30 y._
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1
It can be noticed that the contribution of the natural radiation sources
to the total dose of the present generation will be significantly greater
than that of the artificial sources even in the Exoup of reindeer herders.
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