Annular sealing structure for steel containment and construction method

By installing a hinged connector and a flexible sealing material in a circumferential sealing structure between the steel containment building and the shielded building, the problems of sealing and cooling effect of traditional steel containment buildings under accident conditions are solved, and the sealing and cooling effect are improved under deformation conditions.

CN122266830APending Publication Date: 2026-06-23SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD
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Patent Information

Application Number
CN202610265061.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-05
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Traditional steel containment structures are difficult to maintain the sealing and cooling effect of cooling water under deformation conditions during accidents, and cannot effectively utilize the heat dissipation capacity of water.

Method used

A hinged connector is installed between the steel containment building and the shielded building. A circumferential sealing structure is formed by multiple blades and flexible sealing material. The hinged connector can deform in tandem with the steel containment building to maintain the seal, increase the cooling water storage space, and remove heat through boiling.

Benefits of technology

Maintaining the airtightness of cooling water during steel containment deformation increases the cooling area, improves construction efficiency and quality, prevents cooling water leakage, and effectively utilizes the heat dissipation capacity of water.

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Abstract

The invention relates to an annular sealing structure for a steel containment and a construction method, and belongs to the technical field of nuclear power structure engineering. The structure comprises a steel containment and a peripheral shielding plant wall, a steel containment ring beam is arranged on the periphery of the steel containment, a wall ring beam is arranged on the inner side of the shielding plant wall, and the steel containment ring beam and the wall ring beam are connected through a plurality of hinge type connecting pieces. Continuous flexible sealing materials are laid on the upper surfaces of the steel containment ring beam, the hinge type connecting piece and the wall body ring beam; the hinge type connecting piece comprises a plurality of hinge pieces, the hinge pieces are connected through pin shafts, and the sum of the lengths of the hinge pieces is larger than the linear distance between the steel containment ring beam and the wall ring beam. The shape of the hinge type connecting piece can be adjusted through rotation of the multiple blades, the hinge type connecting piece and the flexible sealing material cooperatively deform when the steel containment vessel deforms, the sealing effect of the upper space of the annular sealing structure is maintained under the condition that the steel containment vessel deforms, and the contact area of cooling water and the steel containment vessel is expanded to the side wall of the steel containment vessel.
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