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The main protective measures against nuclear fuel abrasion are as follows: optimizing the design of the positioning grid. By improving the structure and manufacturing processes of this grid, it is ensured that it exerts sufficient clamping force on the fuel rods, thereby preventing flow-induced vibrations of the fuel rods due to the lateral flow of the coolant and reducing the factors that lead to abrasion damage at its source. Interception of foreign objects in the circuit: A lower pipe seat with a foreign object filtering function is used, and a protective frame is installed right next to it to capture foreign objects that are carried along with the coolant flow, thereby preventing these objects from coming into contact with the surface of the fuel rods and causing wear. Surface strengthening treatment of the cladding: A protective, wear-resistant oxide film is formed at the lower end of the fuel rod cladding, thereby improving the cladding’s own wear resistance and reducing the risk of abrasion penetration caused by foreign objects or vibrations. Strict control over the cleaning of the cooling circuit is essential: during equipment installation and maintenance, all types of foreign substances remaining in the coolant circuit must be completely removed. At the same time, continuous monitoring of the emergence of such foreign substances within the circuit during operation is necessary to reduce factors that can cause wear at its source.