Dispersion-filled composite functional metal thermal-insulation layer

Abstract

The invention discloses a dispersion-filled composite functional metal thermal-insulation layer, comprising a thermal insulation outer box, and gamma shielding layers, a boron carbide powder and a metal reflective foil which are packed inside the thermal insulation outer box, wherein the gamma shielding layers are prepared from an inorganic shielding material with metal characteristics; the orderof filling in the thickness section of the thermal insulation layer is: an inner shell plate of the thermal insulation outer box, an inner-side gamma shielding layer, multiple layers of metal reflective foil, an outer-side gamma shielding layer and an outer shell plate of the thermal insulation outer box, the boron carbide powder is uniformly dispersed in the cavity between adjacent two layers ofmetal reflective foil; and the metal reflective foils are arranged in a positive and negative double-ball-socket corrugated shape arranged at intervals in a vertical and horizontal regular way or a positive and negative triangular corrugated shape or chocolate corrugated shape with periodic variation, and adjacent two layers of metal reflective foil are alternately stacked in a way of the top point of a positive ball socket facing the top point of a negative ball socket. The invention provides the composite metal thermal insulation layer with thermal insulation function and radiation shieldingfunction, and can be used in a high-temperature radiation environment for a long time without replacement.

Description

technical field [0001] The invention relates to the technical field of the nuclear industry, in particular to a dispersion-filled composite functional metal insulation layer. Background technique [0002] When the nuclear reactor is in normal operation, high-temperature, high-pressure, and high-radioactive cooling medium flows inside the primary equipment and pipelines of the nuclear reactor. It is necessary to install an insulation layer on the outer surface of the equipment and pipelines to reduce heat loss. Shielding materials are installed outside the equipment and pipelines to reduce the radiation dose around the equipment, which is helpful for personnel's inspection and maintenance during service. At present, the first-level equipment and the outside of the pipeline of the nuclear reactor coolant system usually use a metal insulation layer, but this metal insulation layer only has the function of heat preservation and heat insulation, and does not have the function of ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the composite metal insulation layer with radiation shielding function in the prior art is made of organic materials, which has poor high temper

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