Or it could be used secretly with more sophisticated machines quickly to turn Iran's legal stockpile of low-enriched uranium into high-enriched uranium for weapons, for example if Iran were to withdraw from the Nuclear Non-Proliferation Treaty.
Adding to the complexity of the situation, a U.N. report released just after the Baghdad talks said that inspectors had found a high level of enricheduranium in Iran.
The country's two previous tests have both involved plutonium devices, but some analysts say the threat of "high-level" testing could also indicate the North intends to detonate its first nuclear device made with highly-enriched uranium.