Integral splicable fuel element

By using an integrated, modular fuel element substrate and fuel body connection structure, the risks associated with the fuel rod clamping system in pressurized water reactors are resolved, enabling convenient installation, stable operation, and efficient maintenance, while improving the safety and heat dissipation performance of the fuel elements.

CN119943449BActive Publication Date: 2026-07-14NUCLEAR POWER INSTITUTE OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NUCLEAR POWER INSTITUTE OF CHINA
Filing Date
2024-12-20
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

In existing pressurized water reactors, fuel rods require clamping systems, which leads to a high risk of component damage and failure. Furthermore, water-induced vibration erosion and foreign object erosion can cause fuel rod breakage, limiting the application scenarios and safety of fuel elements.

Method used

It adopts an integrated, modular fuel element, which is assembled through the connection structure of the substrate and the fuel body to form a flexible combination of fuel elements, adapting to different reactor designs and space requirements, reducing installation difficulty, and allowing for individual disassembly and maintenance in case of failure, thereby enhancing stability and heat dissipation efficiency.

Benefits of technology

It improves the ease and stability of fuel element installation, reduces maintenance costs, extends service life, enhances heat dissipation efficiency and safety, reduces radiation hazards, and improves reactor operating efficiency and safety.

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Abstract

The application relates to the field of nuclear reactor fuel elements, in particular to an integrated splicable fuel element, which comprises a base body and fuel bodies arranged in the base body, at least one fuel body is arranged in each base body, the fuel bodies are uniformly arranged in the base body, a plurality of connecting structures are arranged on the base body, and the base bodies can be spliced in the longitudinal and transverse directions through the connecting structures. The application has the effects of eliminating the negative influence caused by the introduction of a clamping system for eliminating the rod structure and expanding the application scenarios of the fuel element to meet the requirements of a solid core.
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