A composite functional metal insulation layer filled with shielding material

Abstract

The invention discloses a composite functional metal thermal insulation layer filled with shielding material in the middle, which comprises a thermal insulation outer box, a neutron shielding layer, a gamma shielding layer, metal reflective foils on both sides of the cold and hot sides, a neutron Both the shielding layer and the gamma shielding layer are made of inorganic shielding materials with metal properties; the filling sequence on the thickness section of the insulation layer is as follows: the thermal surface shell plate of the thermal insulation outer box, the metal reflective foil on the thermal surface side, the neutron Shielding layer, gamma shielding layer, metal reflective foil on the cold side, and cold shell of the thermal insulation outer box; the metal reflective foils on both sides of the cold and hot sides are in the shape of positive and negative double ball-socket corrugations arranged at regular intervals vertically and horizontally or Periodically changing positive and negative triangular corrugated shapes or chocolate corrugated shapes, and two adjacent layers of metal reflective foils are stacked in a back-to-back style with positive and negative ball sockets apex-to-vertex. The invention provides a composite metal thermal insulation layer with thermal insulation function and screen radiation shielding function, which can serve in a high-temperature radiation environment with a 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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