JPS62200299A - Radioactive waste transporter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radioactive waste transfer device for transferring radioactive waste.

[Conventional technology]

In general, radioactive waste generated from nuclear power plants, etc.
It is roughly divided into three types: gas, liquid, and solid, and the strength of radioactivity is classified as high, medium, and low.

Conventionally, among low-level solid wastes, combustible materials are incinerated and the ashes thereof are stored in drums.

However, as the amount of solid waste increases, a large amount of ash is generated after incineration, and the amount of ash stored increases year by year, so the above-mentioned treatment naturally has its limits.

Therefore, it has been proposed to treat the solid waste (incineration ash) using microwaves, for example, in Japanese Patent Application Laid-Open No. 55-1433.
It is disclosed in Publication No. 80.

The radioactive waste processed by these microwave melting devices is so-called incinerated ash, which is obtained by incinerating radioactive waste discharged from nuclear power plants and the like.

This incinerated ash is stored in drums and transported to a processing plant. At the treatment plant, the incinerated ash is air-transported from a drum can, the air and incinerated ash are separated using a cyclone, a filter (made of cloth and paper), etc., the incinerated ash is stored in a hopper, and is fed to a feeder as needed. ing.

[Problem that the invention seeks to solve]

However, in the method described above, the incinerated ash in the incinerator is transferred through the drum, so when the incinerated ash is packed into the drum or taken out, the incinerated ash scatters outside and causes radiation. There is a risk of contamination.

[Purpose of the invention]

The present invention solves the above-mentioned problems, and aims to provide a radioactive waste transfer device that can transfer incinerated ash in an incinerator to the next process without scattering it.

[Means for solving problems]

The radioactive waste transfer device according to the present invention is formed at the lower part of an incinerator, has one end opened to a storage section for temporarily storing the incinerated ash incinerated in the incinerator, and has an incinerated ash transfer device for transferring the incinerated ash by gas. The apparatus includes a transfer pipe and a gas separation device connected to the other end of the incinerated ash transfer pipe to separate the incinerated ash from the incinerated ash transfer pipe from the gas.

[Action of the invention]

In the present invention, the incinerated ash in the storage section of the incinerator passes through the incinerated ash transfer pipe together with the gas that is the transfer fluid, and is supplied into the gas separation device, and the incinerated ash and the gas are separated by this gas separation gH. Ru.

[Embodiments of the invention]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to an embodiment shown in the drawings.

Figure 2 shows an embodiment of the radioactive waste transfer apparatus of the present invention, and in the figure, reference numeral 1 indicates an incinerator for incinerating radioactive waste. A storage section 3 for temporarily storing incinerated ash 2 incinerated in the incinerator 1 is formed in the lower part of the incinerator 1. Dampers 4 and 5 are formed above and below the storage section 3 and are opened and closed by a motor or the like. One end of an incinerated ash transfer pipe 6 for transferring incinerated ash 2 using a gas such as air is open in the storage section 3, and a filter 7 is disposed at the tip end of the incinerated ash transfer pipe 6. In the figure, reference numeral 8 indicates a gas separation device that separates the incinerated ash 2 from the gas from the incinerated ash transfer pipe 6. is connected. A valve 16 is arranged in the incineration ash transfer pipe 6.

A rotary filter 19 made of a cylindrical porous body is arranged inside the container body 13. This rotary filter 19 is made of ceramics, Pearlcon (registered trademark of Daicel Chemical Industries), or the like. This rotary filter 1
A sprocket 21 for rotating the rotary filter 19 and a geared motor 25 connected to the sprocket 21 via a chain 23 are disposed above the rotary filter 9 . Furthermore, on the top of this rotary filter 19,
One end of a pipe 27 for suctioning the air in the rotary filter 19 is connected, and the other end is connected to a suction means 28 such as a blower. Incineration ash 2 attached to the outer periphery of the rotary filter 19 is disposed on the outer periphery of the rotary filter 19.
A separation plate 29 for scraping the water is disposed at a constant distance from the rotary filter 19, for example, at a distance of 1 tl. The lower part of the container body 13 opens into the hopper 31 . In addition,
This hopper 31 supplies the incinerated ash 2 to, for example, a microwave melting device, an arc melting device, etc. (not shown).

In the radioactive waste transfer device configured as described above, the incinerated ash 2 in the storage section 3 formed at the lower part of the incinerator 1 is transported through the filter 7 and the incinerated ash transfer pipe 6 together with the air that is the transfer fluid.
A rotary filter 19 made of a cylindrical porous body is placed inside the container body 13 after being supplied into the container body 13 through
As shown in FIG. 2, they adhere to the outer periphery of the rotary filter 19 and are sequentially laminated to form an adhesion layer 33, and when the thickness thereof exceeds, for example, 1), the adhesive layer 33 is placed around the outer periphery of the rotary filter 19 at regular intervals. It is scraped off by the separating plate 29. The scraped radioactive waste is dropped into the hopper 31 from the lower part of the container body 13.

On the other hand, as shown by arrows in FIG. 2, the gas that has passed through the rotary filter 19 made of a porous body is sucked by the suction means 28 and discharged to the outside.

That is, in the radioactive waste transfer device configured as described above, the incinerated ash in the storage section 3 passes through the incinerated ash transfer pipe 6 together with the gas as the transfer fluid, and is supplied into the gas separation device 8. The gas separation device 8 separates the incinerated ash 2 from the gas. Therefore, unlike in the past, there is no need to transfer the incinerated ash 2 in the incinerator 1 via a drum, and the incinerated ash 2 is scattered outside when it is packed into the drum or taken out. This eliminates the risk of radioactive contamination.

In addition, in the radioactive waste transfer device configured as described above, since the filter 7 is placed at the tip of the incinerated ash transfer pipe 6, foreign substances such as metals and gravel are separated by the filter 7, and foreign substances of, for example, within 10 square meters in diameter are separated by the filter 7. It is now possible to transfer only the incinerated ash 2 to the gas separation bag M8, and the feeder in the post-process,
Selection of valves etc. can be made easier. In this case, the hopper 5 is opened at an appropriate time, and only foreign substances such as metal and gravel are accommodated in the container 33.

In addition, since the storage part 3 is conventionally formed in the lower part of the incinerator 1, this invention can be implemented easily by opening the incineration ash transfer pipe 6 into this storage part 3. Furthermore, by forming the incinerated ash transfer pipe 6 from a heat-resistant material, the incinerated ash 2 can be easily transferred even when the temperature of the incinerated ash 2 is high.
)

In addition, in the embodiment described above, as the gas separation device 8,
Although an example using a ceramic filter has been described, the present invention is not limited to this example, and it goes without saying that, for example, a cyclone type filter or the like may be used.

〔Effect of the invention〕

As described above, according to the present invention, the incinerated ash in the incinerator is directly transferred to the gas separation device through the incinerated ash transfer pipe, so the incinerated ash is not scattered outside, and radioactive contamination is prevented. This has the advantage of being able to reliably eliminate the possibility of this occurring.

[Brief explanation of drawings]

FIG. 1 is a partial vertical cross-sectional view showing an embodiment of the radioactive waste transfer device of the present invention, and FIG. 2 is a vertical cross-sectional view showing the vicinity of the rotary filter of FIG. 1... Incinerator, 2... Incineration ash, 3... Storage section, 6
... Incineration ash transfer pipe, 8... Gas separation device.

Claims (2)

[Claims] (1) An incinerated ash transfer pipe formed at the lower part of the incinerator, one end of which is opened to a storage section that temporarily stores incinerated ash in the incinerator, and which transfers the incinerated ash using gas; A radioactive waste transfer device characterized by comprising a gas separation device connected to the other end of the pipe to separate the incinerated ash from the incinerated ash transfer pipe from the gas. (2) The radioactive waste transfer device according to claim 1, wherein the gas is air.