Internally deposited fallout from the Chernobyl reactor accident Page: 1 of 4
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CONF-871101—77
DE88 003035
INTERNALLY DEPOSITED FALLOUT FROM THE
CHERNOBYL REACTOR ACCIDENT*
(Robert A. Schler.ker, Argonne National Laboratory)
Shortly after the announcement of the Chernobyl reactor accident, health
protection scientists in several countries began monitoring the fallout
radioactivity in the local citizenry and in people arriving from abroad.
Whole-body counting measurements are known to have been made in England,
France, Germany, Hungary, Italy, Japan, the Netherlands, Poland, the USA and
the USSR. Gamma emitters detected by these methods reported from laboratories
in several countries are listed in Table 1. Confirmation of the observation
of a nuclide, by more than one laboratory, is indicated by a "Y" in the
rightmost column; "N" indicates detection by only one laboratory.
Of these radionuclides 1311 and i34»i37Cs are the radioisotopes of
greatest concern to radiological health. In our work with about 100 subjects
resident in eastern Europe (mostly Poland) at the time of the accident or
traveling as tourists, 13il was readily detectable in the thyroid through inid-
June, 1986, and was detectable in some subjects as late as early July, 9 to 10
weeks after the start of the accident. Among 42 subjects who were in eastern
Europe on April 26, 1986, and in whom i3lI was detectable, the median activity
in the thyroid was 1.4 nCi at the time of measurement. When extrapolated back
to April 26 using a single exponential retention function for the thyroid and
an 8-day effective half-life, the median activity was 42 nCi. The frequency
distribution resembled a lognormal distribution. The extrapolated activities
lay between approximately 2 and 1200 nCi. (Activities extrapolated to
*Work supported by the U.S. Department of Energy, Office of Health and
Environmental Research, under Contract No. W-31-109-ENG-38.
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Schlenker, R.A. Internally deposited fallout from the Chernobyl reactor accident, article, January 1, 1987; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1085786/m1/1/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.