Abstract: Apparatus for suspending thermal shielding within a nuclear reactor. The apparatus includes a plurality of horizontally deformable, interconnected links which form a chain and suspend a series of horizontally disposed equally spaced thermally reflective plates from beneath the upper horizontal boundary of a nuclear reactor. The deformable links minimize heat transfer and accommodate both seismic and differential thermal expansion of the reflective plates.

Abstract: 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.