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Apparatus and method for long-term sealed storage of spent fuel rods and samples thereof

A technology for spent fuel and samples, which is used in reactor fuel elements, reactors, and greenhouse gas reduction. The effect of small hot room space and convenient operation

Active Publication Date: 2017-09-12
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the existing spent fuel rod storage methods are difficult to effectively protect spent fuel samples and control radioactive sealing well, the present invention provides a device and method for long-term sealed storage of spent fuel rods and their samples

Method used

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  • Apparatus and method for long-term sealed storage of spent fuel rods and samples thereof
  • Apparatus and method for long-term sealed storage of spent fuel rods and samples thereof

Examples

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Embodiment 1

[0027] as attached figure 1 with 2 As shown, the device for long-term sealed storage of spent fuel rods and their samples according to the present invention includes a storage container 1 and a leak detection container 2. One end of the storage container 1 is open, an internal thread is provided on the inner wall of the opening end, and the other end is closed. The outer end surface of the closed end is provided with a card slot; the open end of the storage container 1 is provided with a cock 4, and the cock 4 is provided with an external thread suitable for the internal thread of the open end of the storage container 1, and the cock 4 adopts a cavity Structure, the cavity is opened at the inner end of the cock 4, the opening of the cavity is provided with a microporous filter 5, the side wall of the cock 4 is provided with a vent hole 6, and the outer end surface of the cock 4 is provided with a card slot; the leak detection The container 2 is a tubular structure with one en...

Embodiment 2

[0030] The method for storing a certain batch of spent fuel rods using the device for long-term sealed storage of spent fuel rods and samples thereof in Embodiment 1, the method includes the following steps:

[0031] (1) In the hot chamber, put the spent fuel rods to be stored into the storage container 1, screw on the cock 4 through the handle 17, and make the vent hole 6 of the cock 4 in a ventilated state; put the above-mentioned storage container with spent fuel rods 1 Put it into the leak detection container 2, cover the flange cover 12, and lock it by pulling the handle 11 of the chuck flange 10; connect;

[0032] (2) Heat the leak detection container 2. After the spent fuel rods are heated, the moisture absorbed by them is gradually released in the form of gas, and the gas in the leak detection container 2 is pumped out by a vacuum pump, and the gas in the storage container 1 is also passed through the cock 4. The air vent 6 is drawn out; as the pumping proceeds, the s...

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Abstract

The invention relates to the field of storage of strong radioactive materials. In order to solve the problems that an existing spent fuel rod storage method cannot protect spent fuel samples effectively and control radioactive airtightness well, the invention provides a device and method for hermetically storing spent fuel rods and samples thereof for a long time. The device comprises a storage container and a leakage detection container, wherein a cock is arranged in the opening end of the storage container, the leakage detection container is of a tubular structure with one closed end and is provided with a ventilating connector as well as a chuck flange and a flange cover, and a screw is provided with a rotary handle. The device and the method can effectively prevent the spent fuel rods from influence of water and oxygen, and the device has the advantages of simple structure, high reliability, convenience in operation and small occupied space in a hot cell, can facilitate difficult manipulator operation in the hot cell, and meets the requirement on long-term safe storage of the spent fuel rods and samples thereof.

Description

technical field [0001] The invention relates to the field of storage of highly radioactive materials, in particular to a device and method for long-term sealed storage of spent fuel rods and samples thereof. Background technique [0002] In the field of nuclear power, nuclear fuel is usually made into fuel assemblies to facilitate its fission reaction in a nuclear reactor. Taking the most common pressurized water reactor nuclear power plant as an example, it uses low-enriched uranium with an enrichment degree of 3.2%, 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, it needs to be unloaded from the nuclear reactor, and the unloaded nuclear fuel rods are called spent fuel rods. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C19/07
CPCG21C19/07Y02E30/30
Inventor 殷振国颜田玉李显华解含
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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