| 摘要 |
A protective device for a vessel suspended beneath the closing plate of a nuclear reactor in which the wall of the vessel is covered in the vicinity of its connection to the plate towards the inside of the vessel by a metal heat insulating structure constituted by at least one layer of juxtaposed panels. Each of the panels is formed by two parallel cover plates between which is located a layer of thin superimposed metal members. The connection between the cover plates is provided by pins which are perpendicular to the plane of the plates fixed at one end to one of the plates and screwed at the opposite end to a nut which bears against the other plate, thus compressing the layer. The edges of the cover plates of two adjacent panels in the structure are separated by a gap. The layer of thin metal members located between the plates of one panel projects laterally beyond the outline of the latter so as to engage between the plates of at least one adjacent panel while filling the gap. The thin metal members of each layer are staggered with partial overlapping from one member to the next. The heat insulating structure is supported by a plurality of angle irons, each of which has a lateral ferrule constituting one of the two cover plates of each panel, applied against the inner wall of the vessel and a lower supporting flange for the insulating panels.
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