By Arnold M. Friedman (Eds.)
content material: The function of actinide habit in waste administration / John W. Bartlett --
Moisture and solute delivery in porous media / Merlin L. Wheeler --
The migration of plutonium and americium within the lithosphere / S. Fried, A.M. Friedman, J.J. Hines, R.W. Atcher, L.A. Quarterman, and A. Volesky --
organic pathways and chemical habit of plutonium and different actinides within the atmosphere / Roger C. Dahlman, Ernest A. Bondietti, and L. Dean Eyman --
program of the field version conception to the geophysical delivery of PuO₂ : geochemistry of Pu(NO₃)₄ / A.T. Jakubick --
Oklo, an scan in long term geologic garage / E.A. Bryant, G.A. Cowan, W.R. Daniels, and W.J. Maeck.
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Extra resources for Actinides in the Environment
Tablets of basalt were cut with smooth surfaces. Five of the six surfaces of the tablet were rendered impervious to water by coating them with wax. The sixth surface was l e f t untreated and was held in the apparatus in such a man ner as to be exposed to and wetted by a solution containing plutonium. 01 cm) as shown in Fig. 12. The space be tween the basalt and Teflon surfaces then constituted the fissure through which the aqueous medium could flow. Since a l l other surfaces of the basalt were waxed they did not participate in the experiment.
18). Distribution coefficients for sandy subsoils were generally one or less than one, indicating a large fraction of the Np remained in solution. The K. reported in Table II for Np(V) was 320 for the s o i l clay. Since the clay fraction of s o i l s i s generally the most reactive f r a c t i o n , the conclusion from these results i s that Np(V) should be the most mobile actinide element in the environment. Such mobility has important implications for long-term management of waste because of possible placement of wastes in geologic media that may not possess sorption characteristics as effective as surface s o i l s .
Compared with present-day levels of Pu entering t e r r e s t r i a l , freshwa ter, and marine ecosystems from global f a l l o u t , only small additional quantities of actinide elements w i l l be released from fuel cycles to the environment. Based on current fuel cycle concepts, operations involving fuel reprocessing and fabrication w i l l be the principal contributors of actinide elements to the environment. 4 mCi of man-made actinides would be released routinely for each 1000-MW(e) year of operation (2j.