Why should we simulate parts of nuclear weapons, if you will not build such a weapon? To interpret the IAEA that Tehran continued "activities that are relevant to the development of a nuclear explosive device.
There are not formulated entirely undiplomatic, but compared to earlier strikingly clear statements that makes the International Atomic Energy Agency on Tuesday with their published report on Iran's nuclear program.
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"Such experiments bring the high explosives in connection with nuclear material or nuclear material substitutes, are strong indications for possible weapons development. Iran must explain the rationale behind it first, "it says. Or: ". Is the application of such studies to something other than a nuclear explosive device is unclear for the IAEA" And where it was reported earlier years, they could "not exclude" a military nuclear program, there stands now: it had "serious concerns about a possible military dimension. " The information to be "total credibility" and point to that Tehran "activities continued to be relevant to the development of a nuclear explosive device - and that this, at least in part, persisted.
Accumulation of secondary importance only
Indeed, the focus of the IAEA reports on Iran, whose 1980 since the secret, "purely civilian" nuclear program in 2002 broke, shifted since 2005-06: went Previously it comes to international law illegal uranium enrichment plant in Natanz: There is raw uranium, one for the gas uranium hexafluoride (UF6) converts enhanced, so that his tiny proportion of natural increase of highly radioactive uranium-235 isotope. If the share-235U three to five percent, one can produce nuclear fuel rods through intermediate steps. With more than 85 percent has a raw material for atomic bombs.
Also, now is the enrichment, which Iran would stop due to resolutions of the UN Security Council, the speech. Natanz centrifuges are installed for around 8000, of which about 6200 "run", would face several hundred more elsewhere, mostly inactive. Previously to 4.9 tonnes have been produced low-enriched UF6, with small amounts of 20-percent uranium gas, about 74 kg. Experts say the total amount for the construction of some rich three bombs - a process that could not be completed within months.
The report focus changed when the IAEA on the Iran documents procured for the construction of hollow spheres of metallic 235U was: How does an A-bomb core. And the typical "accessories" that you need for the balls to make them explode, is clearer than before in the center.
Because it's about to "multipoint ignition systems": these are layers extremely fast-burning explosive that surrounds the ball and you ignite simultaneously at many points must be such that the pressure wave, the ball absolutely crushes uniform - ie the "critical mass" pressed their radioactivity triggers a chain reaction. Failing that, the nuclear explosion has only a fraction of its planned power, not because uranium ignites everything. This is called the "sizzle" (sizzle). With such systems, you may need to do other things, that Iran had worked.
But even at hyper-fast fuses, the "Exploding Bridge Wire Detonators" (EBW). The wires are laid in explosives. It leads into a strong current, they evaporate in a millionth of a second or less and the explosives ignite the uranium sphere. The IAEA notes that there are civilian applications for this, but this was the exception. EBW were first designed for the U.S. atomic bombs in 1945.
Skeptical make the IAEA information on the procurement of "neutron initiators", which are parts of some of polonium and beryllium, which one is inside the uranium sphere, in the explosion, they emit additional neutrons, they support the splitting of as many 235U nuclei.
How to simulate a bomb
At the most explosive, the places to "hydrodynamic" experiments, computer-aided modeling of the propagation of neutrons and "Project 111". In the former bomb cores are made of other materials reproduced, surrounded with explosives and ignited, so it simulates the behavior of "real" materials ("hydrodynamic" it is, since the metal is liquid at the explosion). When the neutron propagation is studied the spatial behavior of these particles, which drive the chain reaction. As "Project 111" studies operate to accommodate a load in the spherical head of a Shahab-3 medium-range missile.
At these points, Iran has largely denied to do it yourself, the alleged evidence was faked. The IAEA, however, it keeps for a very believable.
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