One side filling shielding material insulation layer for nuclear grade equipment and pipelines

Abstract

The invention discloses a thermal insulation layer with one-side filling shielding material for nuclear-grade equipment and pipelines, which includes a thermal insulation outer box and a neutron shielding layer, a gamma shielding layer and a metal reflective foil packed inside the thermal insulation outer box. Both the sub-shielding layer and the gamma shielding layer are made of inorganic shielding materials with metal properties; the filling order on the thickness section of the insulation layer is as follows: the inner shell plate of the insulation outer box, the neutron shielding layer, the gamma shielding layer, the metal reflector Foil, the shell plate of the thermal insulation outer box; the metal reflective foil is in the shape of positive and negative conical boss corrugations arranged at regular intervals vertically and horizontally, and two adjacent layers of metal reflective foils are arranged with the apex of the positive and negative conical boss facing the apex Back-to-back staggered stacking. The invention provides a composite metal insulation layer with both thermal insulation function and screen radiation shielding function, which can serve in a high-temperature radiation environment for a long service life without replacement, and meets the requirements of nuclear-level equipment and pipeline insulation layers.

Description

technical field [0001] The invention relates to the technical field of the nuclear industry, in particular to a thermal insulation layer with one-side filling shielding material for nuclear-grade equipment and pipelines. 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 ...

AI Technical Summary

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 One-side filling shielding material insulation layer for nuclear-grade equipment and pipelines

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