4. Uranium resources worldwide
4.1 Defining the different resource categories
Resource estimates are divided into distinct categories corresponding to different degrees of certainty of the quantities considered.
Resources reasonably assured (RRA), i.e. recoverable at a given cost, are found in known ore deposits whose volume, grade and configuration have been determined. Within these RARs, the quantities recoverable at different costs are determined.
Estimated Additional Resources (EAR) are less reliable estimates, as they are not the result of measurements but of presumptions based on geological data. They are not taken into account here.
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Uranium resources worldwide
Economic data
Within the reasonably assured resources, we determine the quantities recoverable at different costs. In this case, the cost range below $40/ kg U, which corresponds approximately to the price of uranium in 1997, and the cost range between $40 and $80/ kg U, which may become attractive in the future, are selected.
From 1979 to 1994, the price of uranium on the spot market fell from US$43 to US$6 per...
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