Abstract: A gas-cooled, high-temperature nuclear reactor includes a metallic core barrel, a graphite or carbon block lining disposed in the core barrel, a hot gas line including an outer pressure-confining metallic pipe and a ceramic flow guidance pipe, insulation separating the metallic pipe from the ceramic pipe, a stub concentric with the hot gas line, a device for detachably connecting the stub to the core barrel, the metallic pipe being tightly disposed in the stub, a device for detachably fastening the metallic pipe to the stub, a sleeve, a device for detachably fastening the sleeve to the lining, a bellows compensator being disposed in the stub and having one end tightly fastened to the stub and another end, and a device for connecting the other end to the sleeve.

Abstract: A device for measuring elongation of a structure includes mounts formed at least partially of electrically insulating ceramic material, the mounts having at least two points to be attached to a structure for shifting the mounts relative to each other upon elongation of the structure, and electrically conducting parts disposed on the mounts having electrical properties being influenced by the shifting of the mounts, at least a portion of each of the electrically conducting parts being subjected to mechanical stresses, and at least the portions of the electrically conducting parts being formed of electrically conductive ceramic material.

Abstract: A pipeline carrying high-temperature fluids and having an inner conduction pipe, an outer pressure pipe and ceramic insulation disposed between the inner and outer pipes and formed of individual sections being spaced apart defining gaps therebetween, includes ceramic insulating rings formed of woven insulating fiber filling the gaps between the sections of the ceramic insulation, the rings being concentrically disposed one against the other on the inner pipe and having doubled-over edges.