Enriched uranium, from weapons stockpiles

Some DU is drawn from these stockpiles to dilute high-eruiched (approximately 90%) uranium released from weapons programs, particularly in Russia, and destined for use in civil reactors. This weapons-grade material is diluted to about 25 1 with depleted uranium, or 29 1 with depleted uranium that has been enriched slightly (to 1.5% U-235) to minimize levels of (natural) U-234 in the product. 

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