Filtering device for spent fuel post-treatment and disassembly and assembly method

By designing the sealing components of the annular body and boss, the problem of short service life of the sealing components is solved, long-distance disassembly and assembly is realized, reducing the risk of human illumination dose and equipment leakage, and improving the safety and reliability of the equipment.

CN120420718AActive Publication Date: 2025-08-05THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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Patent Information

Application Number
CN202510574545.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-06
Publication Date
2025-08-05
Estimated Expiration
2045-05-06

AI Technical Summary

Technical Problem

In the existing spent fuel after treatment, the sealing assembly has a short service life and is inconvenient to operate and replace it from a long distance when damaged, resulting in an increase in the dosage of people receiving urine and a risk of equipment leakage.

Method used

A sealing assembly including an annular body and a boss on both sides is designed. The bosses have different diameters to form a convex surface. The long-distance disassembly and assembly are achieved through auxiliary tooling, and the radiation resistance and chemical stability of polyethylene material is used to combine the end surface and facade sealing structure.

Benefits of technology

It extends the service life of the sealing assembly, reduces the frequency of people entering the radiation zone, reduces the dose of radiation, and improves the safety and reliability of the equipment.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides a filtering device for spent fuel post-treatment and a dismounting and mounting method. The filtering device comprises a cylindrical filter, the filter cup is arranged in the cylindrical filter; the sealing assembly is arranged between the cylindrical filter and the filter cup; the seal assembly includes: an annular body; the first boss is arranged on the first side of the annular body; the second boss is arranged on the second side of the annular body; the diameter of the first boss is smaller than that of the annular body, a convex face is formed between the annular body and the first boss, and the annular body, the first boss, the second boss and the convex face are integrally formed. The diameter of the second boss is smaller than that of the first boss. The sealing assembly of the filtering device is long in service life, an operator can conveniently disassemble and assemble the sealing assembly at a long distance through an auxiliary tool when the sealing assembly is damaged, the frequency that the operator enters a radiation area for operation is reduced, and the exposure dose level of the operator is reduced.
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