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A detector assembly and nuclear reactor technology, which is applied in the fields of reactor fuel elements, reactors, nuclear engineering, etc., can solve the problems of undiscovered detector assembly dismantling and replacement equipment, etc., and achieves short dismantling time, compact structure and good shielding performance. Effect
Active Publication Date: 2021-01-22
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
[0004] The third-generation nuclear power plants of AP1000 and EPR are still in the construction stage, and no equipment for dismantling and replacing detector components has been found.
Method used
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Embodiment 1
[0100] see Figure 14-Figure 17 As shown, the dismantling device for the nuclear reactor detector assembly is composed of the following components in combination and modularization,
[0101] Detector component gripper 1, large and small car components 2, shearing and winding device 3, vision centering device 4, monitoring device 5, high storage container and storage rack 6; among them,
[0102] The large and small cart assembly 2 is arranged in the nuclear reactor building and is located directly above the detector assembly; the large and small cart assembly 2 includes a cart 202 moving in the Y direction and a trolley 204 moving in the X direction, and the cart 204 is assembled on the cart 202;
[0103] The detector assembly gripper 1 is configured on the upper top surface of the trolley 204. The detector assembly gripper 1 includes an outer cylinder assembly 105 whose longitudinal axis is arranged along the Z direction, and a gripper assembly 104 that moves up and down along...
Embodiment 2
[0138] On the basis of the above examples, if figure 1 , figure 2 as shown,
[0139] like figure 1 , figure 2 Schematic side view of the shielding structure for removal of the nuclear reactor detector assembly.
[0140] figure 1 with figure 2 The shield structure shown is image 3 The shielding structure 304 in.
[0141] The subsequent front and back refer to the direction facing the legend paper and the direction facing away from the paper as shown in the figure.
[0142] Shielding structures, including:
[0143] The left shield body 3048A, the right shield body 3048B, the left shield shaft 3049A, and the right shield shaft 3049B; the left shield body 3048A is rotatably connected around the left shield shaft 3049A, and the right shield body 3048B is rotatably connected around the right shield shaft 3049B; the left shield body Shaft 3049A and right shielding shaft 3049B are at the same level. The distance between left shielding shaft 3049A and right shielding shaft...
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Abstract
The invention discloses a nuclear reactor detector assembly dismounting device. According to the device, firstly, a large and small vehicle assembly is used for coarse positioning to the position above a to-be-dismounted detector assembly, then, a visual centering device is used for fine positioning to the position over the to-be-dismounted detector assembly, then, a detector assembly gripping apparatus is hoisted to the large and small vehicle assembly, and the detector assembly is pulled out of a reactor internals to a preset height; the shearing and winding device shears off the detector assembly, and the low-level section is hoisted by the detector assembly gripping apparatus under the cooperation of a crane and is stored in the low-level container; the high-level section is wound intomultiple layers by a shearing winding device and is stored in a temporary storage container; after the four storage containers are full, the four storage containers are integrally transferred into ahigh-level storage container; and the high-level storage container is transferred into a spent fuel pool after the high-level storage container is completely disassembled. The nuclear reactor detectorassembly dismounting device is good in reliability, high in efficiency, simple to operate and good in radiation protection performance.
Description
technical field [0001] The invention relates to the technical field of dismantling of reactor equipment, in particular to a main shaft translational winding mechanism for dismantling a detector assembly of a nuclear reactor and a use method thereof. Background technique [0002] The detectors used in the core measurement system in the second-generation and second-generation pressurized water reactor nuclear power plants are divided into thermocouples for temperature measurement and neutron flux detectors for flux measurement. The thermocouple is introduced from the top cover of the pressure vessel, guided by the thermocouple column assembly, and positioned at the specified measuring point position, and the lower end of the thermocouple is located at the core outlet of the upper core plate. The flux detector is introduced from the bottom head of the pressure vessel, guided through the instrument sleeve and finger sleeve when necessary, and enters the guide pipe inside the fue...
Claims
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Application Information
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