Conclusions
This comparison of two ways of making99Mo shows that there is good scope for making it in any area. If there is a thermal reactor having a high flux, one can make99Mo from98Mo, and in that case, even irradiation in a high flux makes it favorable to use highly enriched98Mo and unblocked targets, which raises the specific activity and thus increases the working life in the99mTc generator.
If there is a thermal reactor with low flux or if there is a fast reactor it is best to make99Mo from uranium fission products. The target can be highly enriched235U, which if necessary can be reused, or low-enriched uranium.
There are no essential constraints on making99Mo, and the production is mainly based on technological tasks.
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Additional information
Translated from Atomnaya Énergiya, Vol. 67, No. 2, pp. 104–108, August, 1989.
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Gerasimov, A.S., Kiselev, G.V. & Lantsov, M.N. Making99Mo in reactors. At Energy 67, 608–612 (1989). https://doi.org/10.1007/BF01125257
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DOI: https://doi.org/10.1007/BF01125257