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Clamping head for fuel rod replacing device

A fuel rod and chuck technology, which is applied in the directions of reactor fuel elements, reactors, and greenhouse gas reduction, can solve the problem of unreliable holding of fuel rods, and achieve the effect of safe, reliable and simple structure for grabbing fuel rods.

Active Publication Date: 2011-11-09
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The locking of the fuel rod clamp to the fuel rod is completely dependent on the clamping of the outer tube, and this clamping device is not reliable enough when clamping the fuel rod

Method used

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  • Clamping head for fuel rod replacing device
  • Clamping head for fuel rod replacing device
  • Clamping head for fuel rod replacing device

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 As shown, a collet for a fuel rod replacement device sequentially includes a locking sleeve 1, an elastic collet tube 4, a flared expansion tube 2 and a mandrel 5 from outside to inside;

[0024] Such as figure 2 As shown, the lower part of the locking sleeve 1 has a flared conical surface 6;

[0025] The lower part of the collet tube 4 is located in the locking sleeve 1, and the inside of the head of the collet tube 4 is matched with the head of the fuel rod, as Figure 4 and Figure 5 As shown, there are three longitudinal thin grooves 17 on the lower end of the collet pipe 4, and the thin grooves 17 are evenly distributed along the circumference, and the lower end of the pipe wall is evenly divided into three pieces; the collet pipe 4 is overheated, so that The part with the thin groove 11 in its lower ...

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Abstract

The invention discloses a chuck used for a fuel rod replacing device, belonging to a device used for replacing nuclear fuel in a nuclear reactor. The chuck used for the fuel rod replacing device comprises a locking sleeve and an elastic chuck pipe which is arranged in the locking sleeve; the lower part of the locking sleeve is provided with a flaring conical surface; the inner side of the lower end of the elastic chuck pipe is matched with the head of the fuel rod; the pipe wall of the lower part of the elastic chuck pipe is provided with at least two longitudinal thin troughs. The chuck usedfor the fuel rod replacing device is characterized in that the elastic chuck pipe is internally provided with a flaring expansion pipe; the upper part of the flaring expansion pipe is fixedly connected with the elastic chuck pipe; the pipe wall at the lower end of the flaring expansion pipe is provided with at least two longitudinal thin troughs. The chuck used for the fuel rod replacing device has simple structure, realizes the grasping and disconnecting to the fuel rod by single motion of lifting upwards and inserting downwards of a part (core rod), commonly locks the grasping head by the clamping force of the elastic chuck pipe and the clamping force of the locking sleeve after the fuel rod is grasped, thus leading the fuel rod to be safely and reliably grasped in the detection and replacement process of the fuel rod.

Description

technical field [0001] The invention belongs to equipment for replacing nuclear fuel in a reactor, in particular to a chuck of a device for replacing damaged fuel rods. Background technique [0002] Fuel rod replacement device is one of the important equipments of nuclear power plant fuel assembly repair system, which is suitable for detection and replacement of damaged fuel rods in nuclear power plant fuel assembly. Its function is to inspect the fuel rods in the damaged fuel assembly one by one through non-destructive testing, determine the damaged fuel rods, and then replace the damaged fuel rods with new fuel rods or other spare rods, and then replace the damaged fuel rods with new ones. The fuel assembly is put back into the stack, so that the damaged fuel assembly that has not reached the burnup depth can be returned to the stack for reuse, so as to improve the economical efficiency of the nuclear power plant. [0003] In the fuel rod replacement device, the chuck is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C19/105G21C3/335
CPCY02E30/40Y02E30/30
Inventor 蔡银根周云清刘家正朱丽兵陈瑜陈梁何少华李涛
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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