Though it’s not a violation of anything in the deal, the report also said Iran’s work on a facility to convert its 3.5% uranium to an oxide form has not been completed, and analysts say that probably means there stockpile of that level is up somewhat.

Iran uses 3.5% uranium in the Russian-built Bushehr Power Plant, and 20 percent enriched uranium rods in their US-built Tehran Research Reactor (TRR). The aging TRR produces medical isotopes, and will eventually be replaced by a facility at Arak that uses unenriched uranium, though its construction is stalled by the negotiations.