Fuel assembly discharge shield can

By designing a fuel assembly unloading shielding canister and utilizing the cooperation of the canister body, canister cover, and trigger block, the problem of direct exposure of fuel assemblies to air during unloading was solved. This achieved water-sealed sealing of fuel assemblies during unloading and transfer, reducing the risk of nuclear fission and radiation, and improving nuclear safety.

CN224519517UActive Publication Date: 2026-07-17CHINA NUCLEAR POWER ENGINEERING COMPANY LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA NUCLEAR POWER ENGINEERING COMPANY LTD
Filing Date
2025-07-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, fuel assemblies are directly exposed to the air during unloading, increasing the risk of nuclear fission reactions and radiation risks to workers, and there is a lack of effective shielding measures.

Method used

A fuel assembly unloading shielding tank was designed. Through the cooperation of the tank body, tank cover and trigger block, the structural characteristics of the trigger block opening the opening when leaving the opening and closing the opening when filling the opening are utilized to ensure that the fuel assembly remains in a water-sealed state during unloading and transfer, thereby reducing the risk of fission reaction and radiation exposure.

Benefits of technology

It effectively reduces the risk of fission reactions in fuel assemblies and radiation risks to workers, improves the level of nuclear safety management, and ensures that fuel assemblies remain sealed and shielded during unloading and transfer.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to a fuel assembly unloading shielding tank, which comprises a tank body, an accommodating cavity for accommodating a fuel assembly is formed in the tank body, and a through opening and an open end communicated with the accommodating cavity are formed in opposite ends of the tank body along the axial direction; a tank cover is movably connected to the tank body and used for opening or closing the open end; a trigger block is movable relative to the tank body and can be filled in or separated from the through opening; the tank cover opens the open end when the trigger block is separated from the through opening and closes the open end when the trigger block is filled in the through opening. The fuel assembly unloading shielding tank can reduce the radiation risk of workers during fuel assembly unloading, improve operation safety and be beneficial to nuclear safety control.
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Claims

1. A spent fuel assembly cask characterized by, include: The tank body has an internal cavity for storing fuel assemblies, and the tank body has an opening and an opening at opposite ends along the axial direction, which communicate with the cavity. A can lid, movably connected to the can body, is used to open or close the opening; A trigger block is movable relative to the tank to fill or detach from the opening; The can lid opens the opening when the trigger block disengages from the opening, and closes the opening when the trigger block fills the opening.

2. The fuel assembly's discharge shield can according to claim 1, characterized in that, The can lid is rotatably connected to the can body. The unloading shield can also include a linkage assembly. One end of the linkage assembly is rotatably connected to the can lid, and the other end of the linkage assembly is connected to the can body. The trigger block can pull the can lid to rotate and close the opening through the linkage assembly when the filling is moved to the opening.

3. The fuel assembly's discharge shield can according to claim 2, characterized in that, The linkage assembly includes a power rod, a push rod, and a connecting rod. One end of the power rod is rotatably connected to the wall of the accommodating cavity near the opening, and the other end of the power rod is slidably connected to the push rod. The end of the push rod away from the power rod is rotatably connected to the can lid via the connecting rod. The trigger block can drive the power rod to rotate around the connection point with the accommodating cavity, so as to drive the push rod to pull the can lid to rotate via the connecting rod.

4. The fuel assembly's discharge shield can according to claim 3, characterized in that, The two ends of the connecting rod are rotatably connected to the push rod and the can lid, respectively.

5. The fuel assembly discharge shield canister of claim 3, wherein, The power rod has a first sliding hole, and the push rod has a second sliding hole that is aligned and communicates with the first sliding hole. The push rod is slidably connected to the first sliding hole by a sliding pin, and the sliding pin also passes through the second sliding hole.

6. The fuel assembly discharge shield canister of claim 3, wherein, The accommodating cavity has a clearance groove for the push rod to move and a movable groove for the power rod to rotate on its wall near the opening. The clearance groove and the movable groove are connected.

7. The fuel assembly's discharge shield can according to any of claims 3 to 6, characterized in that, The trigger block has a protrusion on the side near the opening. When the trigger block moves to fill the opening, the protrusion pushes the power rod so that the power rod rotates around the connection point with the receiving cavity.

8. The unloading shield tank for the fuel assembly according to any one of claims 3 to 6, characterized in that, The can lid is two in number, and the two can lids are mated together or separated to close or open the opening; the linkage assembly is correspondingly two in number, and the two linkage assemblies are spaced apart relative to the axis of the receiving cavity.

9. The unloading shield tank for the fuel assembly according to any one of claims 1 to 6, characterized in that, The trigger block includes a filling part and a limiting part. The limiting part is located on the side of the filling part away from the opening. The filling part is used to fill the opening, and the limiting part is used to stop the cavity around the wall of the opening.

10. The fuel assembly's discharge shield can according to claim 9, characterized in that, The port is constructed as a stepped hole, and the trigger block is constructed as a stepped structure that mates with the port.