A composite functional metal insulation layer filled with shielding material on one side

Abstract

The invention discloses a composite functional metal thermal insulation layer filled with shielding material on one side, which comprises a thermal insulation outer box, a neutron shielding layer, a gamma shielding layer and a metal reflective foil packed inside the thermal insulation outer box, the neutron shielding Both the neutron 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 of the insulation outer box, the neutron shielding layer, the gamma shielding layer, and the metal reflective foil 1. The shell plate of the heat preservation outer box; the metal reflective foil is in the shape of positive and negative double ball-socket corrugations arranged at regular intervals vertically and horizontally, periodically changing positive and negative triangular corrugated shapes or chocolate corrugated shapes, and two adjacent layers of metal reflective foils The foils are stacked staggered in a ball-and-socket apex-to-apex back-to-back arrangement. 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 nuclear industry, in particular to a composite functional metal insulation layer filled with shielding material on one side. 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 ...

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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 A composite metal insulation layer with radiation shielding function that can be used for a long period of time and does not need to be replaced regularly

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