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AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsThierry Beck, Jean-Claude Garnier, Denis Lorenzo
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A mitigation assembly for a nuclear reactor including a box with an upper portion forming the head of the assembly housing an upper neutron shielding device, including a head including removable lock and a slug installed free to move in translation relative over a given travel distance, the lock being configured such that locking/unlocking between the head and the box can be made by displacement of the slug with an extraction grab with its pawls attached in the slug. The lower part of the upper neutron shielding device includes a cone-shaped sealing block with the tip of the cone oriented downwards, cooperating with a cone-shaped internal surface of the box, a sealing device being formed between the two, the assembly created forming a removable sealing plug.
A mitigation assembly for a nuclear reactor, comprising a box with a longitudinal axis, the box comprising a central portion in which corium circulates and an upper portion housing an upper neutron shielding device, wherein the upper neutron shielding device comprises an upper neutron shielding head supporting neutron absorbers, wherein the upper neutron shielding device comprises removable locking means configured to cooperate with the box, wherein the upper neutron shielding device comprises a slug being free to move in translation over a given travel distance, the locking means being configured to lock and unlock the upper neutron shielding head with the box by displacement of the slug along the longitudinal axis with a grab for extraction of the upper neutron shielding device with pawls of the grab attached in the slug,
Dependencies are inferred from the claim text.