异物进入系统或设备中会导致设备降级或功能异常，严重时将直接导致设备损坏

Foreign matter entering the system or equipment will cause the equipment to degrade or function abnormally. In severe cases, it will directly cause equipment damage. Therefore, the problem of foreign matter poses a great threat to the safe and stable operation of nuclear power plants. Nuclear grade BOSS welding seam rework processing involves the opening operation of the primary and secondary loop piping systems of nuclear power plants. BOSS welding seam processing mainly performs cutting, grinding and welding operations, and foreign objects such as iron filings and welding slag are likely to enter the system, and the diffusion path into the system is also hard to control. Foreign objects can affect the normal operation of the first and second loop equipment and even cause equipment damage, affecting nuclear safety. Therefore, the risk of foreign object introduction in the BOSS weld repair project is high, and the use of special tools for preventing foreign objects greatly reduces the risk of foreign objects entering the system and provides a guarantee for the safe and stable operation of system equipment.

Foreign material into the system or equipment will lead to equipment degradation or abnormal function, serious will directly lead to equipment damage, so foreign material problems to the safe and stable operation of nuclear power plants pose a great threat. Nuclear-grade BOSS weld repair treatment work involves the nuclear power plant one and two circuit pipe system opening operation, BOSS weld treatment mainly for cutting grinding, welding operations, easy to produce iron chips, welding slag and other foreign materials into the system, into the system its diffusion path is also difficult to control. Foreign bodies can easily affect the normal operation of one and two circuit equipment and even cause equipment damage, affecting nuclear safety. Therefore, the risk of foreign material introduction in BOSS weld repair project is higher, and the use of special tools for foreign objects greatly reduces the risk of foreign material entering the system, and provides a guarantee for the safe and stable operation of the system equipment.

Foreign matter entering the system or equipment will lead to equipment degradation or abnormal function, and in serious cases it will directly lead to equipment damage. Therefore, the foreign matter problem poses a great threat to the safe and stable operation of nuclear power plant. Nuclear grade boss weld repair work involves the opening operation of primary and secondary circuit piping system in nuclear power plant. Boss weld treatment mainly includes cutting, grinding and welding, which is easy to produce foreign matters such as iron filings and welding slag to enter the system, and its diffusion path is difficult to control. Foreign matters are easy to affect the normal operation of primary and secondary circuit equipment, even cause equipment damage, and affect nuclear safety. Therefore, the risk of foreign body introduction in boss weld maintenance project is high, and the use of special tools to prevent foreign matters from entering the system greatly reduces the risk of foreign matters entering the system, and provides guarantee for the safe and stable operation of system equipment.<br>