Importance

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Abstract

A nuclear reactor comprising: a core of nuclear fuel having a height; a pressure vessel surrounding the core of nuclear fuel to allow circulation of gas there through; a set of neutron-absorbing control rods movable for insertion and withdrawal into and out of the core along a respective axis for control of a nuclear reaction in the core, each of the neutron-absorbing control rods comprising mutually sliding elements moving relative to each other between an extended position separated along the axis in a first direction over a first length and a compacted position overlapping over a second length less than the first length and less than 51% of the core height; and a control rod mechanism communicating with the control rods to move them for insertion and withdraw into and out of the core.

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First Claim