State Power Investment has filed a patent for a nuclear island base slab for nuclear power plants. The slab includes a concrete base with embedded air ducts, featuring an internal-penetrating bent pipe structure. The ducts have one end exposed on the upper surface of the slab and the other end exposed on either the side or upper surface. GlobalData’s report on State Power Investment gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on State Power Investment, AI-assisted video analysis was a key innovation area identified from patents. State Power Investment's grant share as of September 2023 was 55%. Grant share is based on the ratio of number of grants to total number of patents.

Nuclear island base slab with embedded air ducts

Source: United States Patent and Trademark Office (USPTO). Credit: State Power Investment Corp Ltd

A recently filed patent (Publication Number: US20230287645A1) describes a nuclear island base slab for a nuclear power plant. The base slab is made of concrete and includes embedded air ducts. The air ducts have a bent pipe structure that penetrates through the concrete base slab. One end of the air duct is exposed on the upper surface of the slab, while the other end is exposed on either the side surface or the upper surface of the slab.

The patent also includes claims for variations of the nuclear island base slab. Claim 2 specifies that the air ducts can be divided into first and second air ducts, with each having one end exposed on the upper surface of the slab and the other end exposed on either the first or second side surface of the slab. Claim 3 states that the first and second air ducts are arranged at intervals along their respective side surfaces. The intervals between adjacent air ducts are 50% of the thickness of the concrete base slab.

Claim 5 describes how adjacent first and second air ducts intersect and abut against each other at an intersection position. Claim 6 specifies that the distance between the first ends of the intersecting air ducts should be between 3 m and 5 m. Claim 7 introduces the addition of third air ducts, which are adjacent to the first ends of the first and second air ducts. Claim 8 states that the first, second, and third air ducts are located in a straight line in the thickness direction of the concrete base slab.

The patent also includes a manufacturing method for the nuclear island base slab. The method involves preparing a cushion layer, providing a steel-bar support frame, fixing the air ducts on the support frame, pouring concrete to form the base slab body, curing the concrete, and filling the air ducts with mortar.

Finally, the patent claims that the nuclear island of a nuclear power plant includes the nuclear island base slab described in claim 1.

In summary, the patent describes a concrete base slab for a nuclear power plant that includes embedded air ducts. The air ducts have a bent pipe structure and are exposed on the upper surface and side surfaces of the slab. The patent also includes variations of the base slab design, a manufacturing method, and the inclusion of the base slab in a nuclear island.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.