Sentence examples for fissile concentration from inspiring English sources
Iran began enriching uranium to a fissile concentration of 20% in 2010, saying it needed this to fuel a medical research reactor.
The deal would neutralise Iran's stockpile of uranium refined to a fissile concentration of 20%, which is a short step away from the level needed for weapons, and called for intrusive UN nuclear inspections, the official said.
But the Iranian Deputy Foreign Minister, Abbas Araqchi, said that sending out uranium enriched to a fissile concentration of 20 per cent – a short technical step away from weapons-grade material – would be crossing a "red line" for his country.
In exchange, a senior U.S official said, Iran would among other things have to suspend uranium enrichment to the fissile concentration of 20percentt at its Fordow underground facility and "constrain the ability to quickly resume operations there".
For that goal to be achieved, experts and diplomats say, Iran would have to restrict enriching uranium to a low fissile concentration, stop most of its centrifuges now used for such work, limit nuclear research, and submit to highly intrusive monitoring by U.N. inspectors.
The fissile plutonium concentration is 0.32 0.44 g cm−3.
The uncontrolled nuclear reactions in atomic bombs require a high concentration of fissile material.
The percentage enrichment refers to the concentration of the fissile isotope U235 in uranium.
It was Iran's first acknowledgment that it had apparently resumed converting into fuel small amounts of uranium enriched to a concentration of 20percentt fissile material.
Fission weapons are normally made with materials having high concentrations of the fissile isotopes uranium-235, plutonium-239, or some combination of these; however, some explosive devices using high concentrations of uranium-233 also have been constructed and tested.
In nature, plutonium exists only in minute concentrations, so the fissile isotope plutonium-239 is made artificially in nuclear reactors from uranium-238.
