Device and method for cutting spent fuel rods

Abstract

The invention discloses a spent fuel rod cutting device and method. The spent fuel rod cutting device comprises a pipe cutter, a flow guiding cover, a pipe sleeve, a filter, a low-pressure blower and an ejector rod. Two holes are formed in the side wall of the flow guiding cover. The pipe cutter is arranged in the flow guiding cover. The flow guiding cover is connected with the pipe sleeve. The ejector rod and the flow guiding cover holes are on the same horizontal line. The filter is arranged between the flow guiding cover and the low-pressure blower. The spent fuel rod cutting method comprises the following steps that (1) all the components are connected, and the position height is adjusted; (2) the pipe cutter and a spent fuel rod are arranged in suitable positions; (3) cutting is conducted; and (4) a cutting port is sleeved with a protective sleeve. According to the spent fuel rod cutting device and method provided by the invention, remote operation can be conducted, the structure is simple, the occupied space is small, the reliability is high, cutting environment radioactive substance pollution diffusion can be effectively controlled, and the hot chamber operation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of reactor engineering, in particular to a spent fuel rod cutting device and method. Background technique [0002] In the field of nuclear power engineering technology, nuclear fuel is usually made into fuel assemblies to facilitate its fission reaction in nuclear reactors. Take the most common pressurized water reactor nuclear power plant as an example, which uses low-enriched uranium and sinters it into uranium dioxide ceramic pellets as nuclear fuel. Hundreds of ceramic pellets are stacked together and packed into slender zirconium alloy tubes to make nuclear fuel rods, and several nuclear fuel rods are assembled together to form fuel assemblies. When the nuclear fuel in the fuel assembly reacts to a certain burnup depth, the reaction power will be affected, and it needs to be unloaded from the nuclear reactor. The unloaded nuclear fuel rods are called spent fuel rods. [0003] The traditional way of cu...

AI Technical Summary

Problems solved by technology

During the cutting process, not only intermediate-level waste liquid is produced, but also radioactive metal slag and fines are easily produced, which will cause large-scale radioactive particles and aerosol pollution to the hot chamber, and consequently, the dose rate of the hot chamber cutting environment will increase. , not only affects the maintenance of equipment in the hot chamber, but also increases the difficulty of decontamination of the hot chamber and the cost of hot chamber operation

Moreover, the traditional spent fuel rod cutting machine takes up a lot of space and is not easy to operate with manipulators

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