A nuclear facility stainless steel cladding structure and construction technology

Abstract

The invention belongs to the field of building structures, and in particular relates to a nuclear facility stainless steel cladding structure and a construction process. The stainless steel cladding structure includes stainless steel cladding, connectors, anchors, ceramic components and concrete, wherein the ceramic components are located between the stainless steel cladding and the concrete for use. The stainless steel cladding and concrete are isolated from each other. After adopting the nuclear facility stainless steel cladding structure of the present invention, the construction process can be simplified, the construction quality level can be improved, the construction period of the nuclear facility stainless steel cladding can be shortened, and the corrosion leakage of the stainless steel cladding can be reduced.

Description

technical field [0001] The invention belongs to the field of building structures, and in particular relates to a nuclear facility stainless steel cladding structure and construction technology. Background technique [0002] 304L stainless steel cladding is often used in the fuel storage and transfer building structures of nuclear facilities. The structure is usually primary concrete-anchor and splicing embedded parts / secondary concrete-dustproof paint-stainless steel cladding. The main construction technology is: [0003] -Install stainless steel cladding anchor-splicing embedded parts on primary concrete; [0004] -Secondary concrete construction, including opening drainage channels; [0005] - Painting on secondary concrete surfaces (including concrete drying, concrete surface treatment, painting, etc.); [0006] -Installation of welded stainless steel cladding on embedded parts. [0007] The first disadvantage is that the current secondary concrete construction is diff...

AI Technical Summary

Problems solved by technology

[0007] The first disadvantage is that the current secondary concrete construction is difficult to ensure the cleanliness of the back of the stainless steel cladding, and the gap between the stainless steel cladding and the splicing embedded parts is prone to retain debris, which often leads to excessive radiographic inspection of the welded stainless steel cladding welds and difficult repairs.

Secondly, the secondary concrete construction needs to strictly control chloride ions and halogen elements to avoid possible stress corrosion of the stainless steel cladding, which will lead to increased construction costs

Due to lack of strict control of chloride ions and halogen elements due to extensive management and construction, etc., corrosion and leakage of stainless steel cladding of nuclear facilities often occur after nuclear facilities have been in operation for several years or more than ten years, resulting in additional outages and maintenance. lead to large economic losses

Third, in order to ensure the quality of the paint film when painting the surface of the concrete for the second time, there are higher requirements on the surface of the concrete such as the degree of dryness, which leads to a longer construction period

However, the quality and life of the paint film are affected by factors such as paint varieties and construction operations, which are often not easy to maintain for a long time, which is quite different from the life of nuclear facilities in decades.

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