Handling method for jammed control rods of nuclear power plant reactor and hoisting gripper for jammed control rods

A technology for nuclear power plant reactors and processing methods, applied in the field of million-kilowatt advanced pressurized water reactor nuclear power plants

Inactive Publication Date: 2016-12-14
GUANGDONG NUCLEAR POWER JOINT VENTURE +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The further technical problem to be solved by the present invention is to provide a jamming control rod lifting gripper that can be operated above water to grasp the control rod underwater, and is easy to operate, firm, fast and safe to take out the control rod according to the structural characteristics of the control rod.

Method used

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  • Handling method for jammed control rods of nuclear power plant reactor and hoisting gripper for jammed control rods
  • Handling method for jammed control rods of nuclear power plant reactor and hoisting gripper for jammed control rods
  • Handling method for jammed control rods of nuclear power plant reactor and hoisting gripper for jammed control rods

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Experimental program
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Embodiment 1

[0073] Embodiment 1, a kind of stuck control rod processing method of nuclear power plant reactor, comprises the following steps:

[0074] (1) Place the control rod transport storage container: place the control rod transport storage container in the reactor pool and keep it upright. Specifically:

[0075] (11) Raise the new fuel elevator in the spent fuel pool to the water surface;

[0076] (12) Use a new fuel short handle tool to grab the control rod transport storage container, and use a crane to lift the control rod transport storage container into the new fuel elevator;

[0077] (13) Lower the new fuel elevator to the bottom of the spent fuel pool;

[0078](14) Use the spent fuel long rod tool to grab the control rod transport storage container at the new fuel elevator, and use the spent fuel bridge crane to put the control rod transport storage container into the side tilting machine basket of the fuel plant of the fuel transfer device;

[0079] (15) Use the fuel tran...

Embodiment 2

[0095] Embodiment 2, as Figure 1-6 As shown, a jamming control rod lifting gripper includes a grabbing mechanism 3 for grabbing the control rod that cooperates with the control rod, and the upper part of the grabbing mechanism 3 is sequentially connected with a manipulation mechanism 2 and a functioning mechanism 2 from bottom to top. The extension control mechanism 1 for adjusting the longitudinal position, the extension control mechanism 1 and the control mechanism 2 are fixedly connected or the two are detachably fixedly connected, and the operation of the extension control mechanism 1 and the control mechanism 2 can respectively drive the grasping mechanism 3 to act Grasp the control stick or let go of the control stick. Since the gripper is used for grasping the control rod at a depth of about 12 meters, the gripper as a whole is a slender rod-shaped structure, and the control mechanism 2 is a slender structure, and the extension of the control mechanism 1 is also to len...

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Abstract

The invention discloses a method for treating jammed control rods of a nuclear power plant reactor and a lifting gripper for jammed control rods. The handling method includes: placing a control rod transport storage container in a reactor pool and keeping it in an upright state; removing the jammed control rods from the fuel The assembly is drawn out and moved underwater, and positioned above the control rod transport storage container; the control rod is guided and inserted into the control rod transport storage container; the control rod transport storage container is transported into the fuel storage pool for storage. The gripper includes a grabbing mechanism for grabbing the control rod. An operating mechanism and an extended operating mechanism that can adjust the longitudinal position are sequentially connected above the grabbing mechanism. Manipulating the extended operating mechanism or the operating mechanism drives the grabbing mechanism to act and grasp stick or loosen the control stick. The treatment method of the present invention can quickly and safely take out the jammed control rods in the reactor core and place them in a safe place for storage. The gripper can be operated on water to grasp the control rods underwater, and is easy to operate, firm, fast and safe to take out the control rods.

Description

technical field [0001] The invention belongs to the field of million-kilowatt advanced pressurized water reactor nuclear power plants, and relates to a method for handling accidents of important components of a pressurized water reactor nuclear power plant, in particular to a method for handling jammed control rods of a nuclear power plant reactor and a lifting grip for jammed control rods Tool. Background technique [0002] In April 2009, during the 13th overhaul (D113 overhaul) shutdown process of Unit 1 of Daya Bay Nuclear Power Plant, the control rod assemblies (core F06, K06, F10, K10 positions) of the four sets of R2 rod groups were stuck at the 32nd The step position cannot be inserted down to 5 steps. After the unit reached the refueling shutdown mode, the 4 sets of R2 rods still could not be inserted into the fuel assembly. After calculation, the four groups of control rods are about 524mm higher than the fuel assembly upper nozzle. Due to the special structure o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C19/26
Inventor 乔素凯黄家权李春常尹佳林陈兰航杨学鹏徐成明马志勇孙智强
Owner GUANGDONG NUCLEAR POWER JOINT VENTURE
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