Nuclear-grade equipment and single-side shielding material filling insulation layer for pipelines

Abstract

The invention discloses nuclear-grade equipment and a single-side shielding material filling insulation layer for pipelines. A insulation outer box, a neutron shielding layer, a gamma shielding layerand metal reflective foils are included, the neutron shielding layer, the gamma shielding layer and the metal reflective foils are contained inside the insulation outer box, and the neutron shieldinglayer and the gamma shielding layer are both made of an inorganic shielding material with metallic properties; the sequence of filling in the thickness section of the insulation layer is an inner shell plate of the insulation outer box, the neutron shielding layer, the gamma shielding layer, the metal reflective foils and an outer shell plate of the insulation outer box; and the metal reflective foils are in shapes of waves of positive and negative circular cone bosses regularly arranged vertically and horizontally at intervals, and every two adjacent layers of the metal reflective foils are stacked in a back staggered manner with the peak of one positive and negative circular cone boss abutting against the peak of the other positive and negative circular cone boss. The composite metal insulation layer with the insulation and heat isolation functions and the screen radiation shielding function is provided, the insulation layer can be used in a high temperature radiation environment fora long time without replacement, and the requirements of nuclear grade equipment and the insulation layer for the pipelines are met

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

Images