Composite functional metal heat-preserving layer with middle filled with shielding material

Abstract

The invention discloses a composite functional metal heat-preserving layer with middle filled with a shielding material. The composite functional metal heat-preserving layer comprises a heat-preserving outer box, and a neutron shielding layer, a gamma shielding layer and cold-side and hot-side metal reflective foils which are filled in the interior of the heat-preserving box, wherein the neutron shielding layer and the gamma shielding layer are prepared from an inorganic shielding material with metallic properties; the order of filling on the thickness section of the heat-preserving layer is successively as follows: a hot-surface shell plate of the heat-preserving outer box, a hot-side metal reflective foil, the neutron shielding layer, the gamma shielding layer, the cold-side metal reflective foil and a cold-surface shell plate of the heat-preserving outer box; the cold-side and hot-side metal reflective foils are of positive and reverse double ball socket corrugated shapes in vertical and horizontal regular interval arrangement, or positive and reverse triangular corrugated shapes or chocolate-like corrugated shapes in periodical changes; meanwhile, two adjacent metal reflectivefoils are stacked in a back-to-back staggered manner with the apex of a positive ball socket facing the apex of a reverse ball socket. The composite metal heat-preserving layer with heat-preserving and heat-insulating functions and screen radiation shielding function provided by the invention can be used in a high-temperature radiation environment with long service life.

Description

technical field [0001] The invention relates to the technical field of the nuclear industry, in particular to a composite functional metal insulation layer filled with shielding materials. 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 th...

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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 temperature resistance, short service life and needs to be replaced regularly. The present invention provides a solution to solve the above problems Composite functional metal insulation layer filled with shielding material

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