Exemplos unilingues (não verificados pela redação)

inglês
The following factors influence the neutron balance in a fissile system and provide the basis for safe designs and methods of criticality control.
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The thin-walled sphere was a commonly used design which ensured that the fissile material remained sub-critical until imploded.
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Thermal reactors require less of the expensive fissile fuel to start.
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Moderation substantially increases the fission cross section for fissile nuclei such as uranium-235 or plutonium-239.
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As a consequence they must add new fissile fuel periodically and swap out some of the old fuel to make room for the new fuel.
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The only controlled method now practical uses nuclear fission in a fissile fuel (with a small fraction of the power coming from subsequent radioactive decay).
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Controls (requirements) on process parameters (e.g., fissile material mass, equipment) result from this analysis.
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A fissionable nuclide that can be induced to fission with low-energy thermal neutrons with a high probability is referred to as fissile.
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A drawback of this process is that it requires targets containing uranium-235, which are subject to the security precautions of fissile materials.
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However, it is possible to build a fast reactor that will "breed" fuel (from fertile material) by producing more fissile material than it consumes.
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