This paper discusses the benefits of obtaining 99m Tc from non-fission reactor-produced low-specific-activity 99 Mo. This scenario is based on establishing a diversified chain of facilities for the distribution of 99m Tc separated from reactor-produced 99 Mo by (n,γ) activation of natural or enriched Mo. Such facilities have expected lower investments than required for the proposed chain of cyclotrons for the production of 99m Tc. Facilities can receive and process reactorirradiated Mo targets then used for extraction of 99m Tc over a period of 2 wk, with 3 extractions on the same day. Estimates suggest that a center receiving 1.