Method for quickly pulling out defective heat transfer tubes of a radioisotope heat exchanger
By employing standardized procedures and specialized tools in radioactive heat exchangers, defective heat transfer tubes can be safely and efficiently removed, solving the problems of poor spatial adaptability and high contamination risk in existing technologies, and ensuring the safety and maintenance efficiency of nuclear facilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN NINGDE NUCLEAR POWER
- Filing Date
- 2026-05-19
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the methods for removing defective heat transfer tubes from radioactive heat exchangers have problems such as poor spatial adaptability, incomplete connection and disconnection, easy damage to the tube sheet, high risk of radioactive contamination and foreign objects, and complicated and time-consuming procedures. These problems result in low maintenance efficiency and high radiation dose to personnel, and cannot meet the needs of safe and efficient maintenance of nuclear facilities.
A rapid removal method for defective heat transfer tubes in radioactive heat exchangers is adopted, which includes standardized steps such as preparation and foreign object protection, plug removal, removal of old heat transfer tubes, and tube sheet hole repair. Through composite positioning, step-by-step cutting, and segmented tube removal design, the logical coherence and risk controllability of the operation are ensured. High-temperature resistant and radiation-proof flexible protective cloth is used for covering, and plug weld cutting device and tube removal device are used for precise cutting and removal to ensure the cleanliness and compatibility of tube sheet holes.
The system enables the systematic removal of defective heat transfer tubes, solving the problems of chaotic tube removal processes and disordered operations. It ensures that the tube removal process is safe, efficient, and non-destructive, providing a good foundation for the subsequent installation of new tubes and reducing the risk of radioactive contamination and personnel radiation dose.
Smart Images
Figure CN122401040A_ABST