Laboratory Tests on the Migration Behaviour of Selected Fission Products in Aquifer Materials from a Potential Disposal
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LABORATORY TESTS ON THE MIGRATION BEHAVIOUR OF SELECTED FISSION PRODUCTS IN AQUIFER MATERIALS FROM A POTENTIAL DISPOSAL SITE IN NORTHERN GERMANY
H. BEHRENS, D. KLOTZ, H. LANG, H. MOSER fOr Radiohydrometrie der Gesellschaft far Strahlen- und UmweltforInstitut schung mbH M~nchen, D-8042 Neuherberg, Fed. Rep. Germany G. BARKE, H. BRUHL, S. GEHLER AND U. MUHLENWEG far Angewandte Geologie, Freie Universitdt Berlin, D-1000 Berlin 33, Institut Fed. Rep. Germany
ABSTRACT
The migration behaviour with respect to retardation by sorption of radioactive Ce, Cs, I, Nb, Ru, Sm, Sr, Tc and Zr in fluviatile and aeolian sand aquifers has been examined in laboratory tests. In these tests it was attempted to simulate the natural conditions of the field. The tests were The results of both types of performed as batch and column experiments. limits and show procedures agree within the error experimental -
small sorption for I- and TcO4 2 medium sorption for Sr + 3 3 high sorption for Cs +, Ce +, Sm +,
The investigations same site.
4
4
Zr
Ru +,
5
+ and Nb + from the
will be continued with other geologic materials
INTRODUCTION Within the frame work of a safety investigation program with regard to the final
disposal
of
radioactive
waste,
work
being
is
done
simulate
to
migration behaviour of selected fission products by a mathematical model. was necessary to perform
contribution
it
distribution
coefficients
for the radionuclides.
factors
sampled in
the surroundings
The
of a salt dome,
which was chosen as a possible
the North West German Basin,
near Gorleben in
for the determination of
experiments
and retardation
under investigation was
material
the As a
repository for radioactive waste in the Federal Republic of Germany.
MATERIALS Clayey sand,
sandy and
were sampled from cores,
amounts of several kilograms. same
origin
surface.
The
were
tests.
sampled
latter three
column experiments
as well
The grainsize
(1.54 U
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