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AssigneeCommissariat a l'Energie Atomique
InventorGuy Lemercier
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This invention relates to a device for heat-insulating the top part of the annular space separating the main vessel from the safety vessel from a fast-neutron nuclear reactor, the two vessels having a common vertical axis and being open at their top part and covered by a horizontal slab in which the ends are fitted so as to be suspended by the slab. According to the invention a substantially cylindrical heat-insulating ring is mounted under the slab and cooperates with the slab and with the facing walls of the vessel to bound the region to be insulated. The ring extends through the annular space in a horizontal plane and is carried by the slab by means of tie-rods, and a top insulating ring divided into two coaxial elements rests on the bottom ring and is secured to the walls of the two vessels respectively by an assembly of spacing springs disposed radially and bearing against the two elements.
A heat-insulating device, for insulating the top part of the annular space separating the main vessel from the safety vessel of a fast-neutron nuclear reactor, the two vessels having a common vertical axis and being open at their top part and covered by a horizontal slab of concrete, in which the ends are suspended by the slab, the device comprising a cylindrical bottom heat-insulating ring mounted under the slab and adjacent the facing walls of the vessels to bound the regions to be insulated, the ring extending through the annular space in a horizontal plane and connected to the slab by tie-rods, and a top heat-insulating ring divided into two coaxial elements resting on the bottom ring and pressed and sealed against the walls of the two vessels respectively by an assembly of spacing springs disposed radially and bearing against the two elements.
Dependencies are inferred from the claim text.