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51 7 ? 84 7 7 a) As UaOg 2. Radioactive wastes generated from thorium mining It is most likely that monazite would be the major ore deposit exploited, if thorium use in nuclear reactors was to develop. The isotopic composition, and therefore the radiological impact of the wastes generated by this ore exploitation will mainly depend on wether or not uranium is extracted as well. This depends chiefly on the uranium market situation and obviously on the uranium concentration. As an example, taken from tab.

The nuclear characteristics of CEFR MA-loaded core are shown in Table III and the reference core parameters are also listed for comparison. TABLE ffl. THE CHARACTERISTICS OF CEFR MA-LOADED CORE Item CEFR Reference Core CEFR MA-Loaded Core U-235 Enrichment 60%(wt) 90%(wt) Loading ratio of MA 0. 50%(wt) Amount of MA loaded(kg) 0. 4 41 As shown in Table HI, the reactivity worth of all control rods in MA-loaded core is smaller than that of reference core This is caused mainly by the decrease of relative importance per neutron in MA-loaded core due to the increase of production rate of multiplication neutrons Although the control rod worth decreases, the total worth is still sufficient for reactor control.

80 ? 03 ? 51 7 ? 84 7 7 a) As UaOg 2. Radioactive wastes generated from thorium mining It is most likely that monazite would be the major ore deposit exploited, if thorium use in nuclear reactors was to develop. The isotopic composition, and therefore the radiological impact of the wastes generated by this ore exploitation will mainly depend on wether or not uranium is extracted as well. This depends chiefly on the uranium market situation and obviously on the uranium concentration. As an example, taken from tab.

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Advanced Fuels with Reduced Actinide Generation (IAEA TECDOC-0916)


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