JPS60135794A - Method of homogeneously solidifying radioactive waste - 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 Application of the Invention] The present invention relates to a method for solidifying and treating radioactive waste confectionery generated from nuclear facilities. Particularly, the method relates to a method for solidifying radioactive waste confectionery generated from nuclear facilities. This invention relates to an assimilation treatment method suitable for assimilation.

[Background of the invention]

A system for solidifying radioactive waste fruit granulated into pellets using a solidifying material such as special water glass powder in the gate of a solidifying container made of inorganic material such as a composite concrete container is disclosed in Japanese Patent Application No. 57-170171. In addition, a system for homogeneously solidifying powdered radioactive waste confectionery using a similar assimilating material in a similar solidifying container was proposed in Japanese Patent Application No. 58-3707'1. In the solidification treatment methods of these applications, a solidification material paste is prepared by kneading the solidification material and its pattern initiator (water) in advance in a kneading tank,
After placing m fruit and assimilated material paste sideways in a solidification container and putting a lid on it, a post-filling of solidification material paste is placed on top of the container.It is described in the above-mentioned Japanese Patent Application No. 58-37077. Figure 1 shows the general flow of the homogeneous solidification treatment system.

This system is Indrum Bandai's homogeneous solidification treatment system that uses a powdered solidification material such as % water glass. The solidified material is stored in the assimilated material hopper 2, and transferred to the solidified material weighing hopper 3, where it is weighed. Next, a fixed amount of added water (hardening initiator) was weighed out in the added water tank 4, and this was stirred in the solidifying material kneading hinoki 5, and then mixed and stirred in the solidifying material 6 to produce a paste-like solidified material. and inject it into the solidification container 1.

On the other hand, the waste fruits are dried and powdered,
The powder is stored in the container 7, and after being measured in a certain amount by the powder reconstituter 8, the light is transferred to the assimilation container 1 into which the paste-like horse chestnut is poured. After removing the waste beams, the powdered waste fruits and the paste solidifying material are mixed and stirred in the seeding container using an agitation la9 to equalize the mixture, thereby producing a homogeneous monomerized body 10.

After that, the container 1ttll is packed, and the solidification process is completed by post-filling 12 in the same paste form. An out-drum homogenization treatment method has already been proposed, in which a mixture of sulfur and solidification material is mixed with water using a width cloth, and the mixture is filled with light into a solidification device and solidified.

However, these proposed solidification processing systems had one or more drawbacks.

(1) Since the assimilating material in the form of special water glass powder starts to harden when mixed with added water, in the system of the above application, the solidifying material solidifies in the injection line from the kneading tank to the assimilation container. Trouble may occur.

(2) In the above-mentioned out-drum homogenization method, the problem of 1iiLI deposition becomes even more serious because it increases the radioactivity. This is similar to rr)j in the plastic homogeneous assimilation method.

(3) Since we are dealing with a paste-like solidifying material, it is necessary to wash the injection line from the cypress to the solidifying container at regular intervals in order to prevent sticking problems. In addition, regarding the treatment of the cleaning waste liquid, in the case of a special water glass assimilation material, special treatment is required to remove Si compounds.

(4) In the in-drum homogeneous solidification method according to the latter application, there is a risk that problems with the stirring device may occur during the mixing and stirring operation of the paste solidified material and the powdered waste in the solidification container. 〇 (5) In the above-mentioned out-drum homogeneous solidification treatment method, the waste fruit and solidified 0 are kneaded into a paste form, which contaminates the kneaded material with radioactivity and makes maintenance difficult. It also causes a heavy burden on the equipment.

[Purpose of the invention]

The present invention provides an improved radioactive waste nest that eliminates the trouble of sticking of solidifying material to a vessel/nc1'' other than an assimilation container, and also eliminates the security of fighting such sticking and fc formation. The purpose is to provide a finer processing method for grapes.

[Summary of the invention]

The problem with the previous examples proposed by MfJ Nji is that all of the problems involved are the process of kneading the crime-prone powder and the addition of water during the grinding process to form a paste before filling it into the solidification container. Attributable to inclusion. In book + 1 light, this kind of process has been eliminated.

That is, the radioactive material of the present invention? 3. The solidification treatment method for rice cakes consists of filling a solidification container with solidified moon powder, which starts hardening when mixed with a hardening initiator liquid, and radioactive waste powder, in a homogeneous state in a solidification container. The invention is characterized by immediately injecting a liquid initiator into a homogeneous mixture of solidified powder and radioactive waste powder that has been exposed to light in a solidification container. Examples] The solidifying material used in the present invention may be any kind of powdery solidifying material that starts hardening when mixed with the liquid curing agent #5, but the following In the assimilation treatment method according to the described embodiment, a special inorganic water glass assimilation material using water as a curing initiator will be taken as an example.

FIG. 2 is a diagram showing the concept of the solidification treatment method. It should be noted that this diagram mainly shows the temporal transition of the treatment process, and does not necessarily show the spatial arrangement or transition.

First, we brought in the empty solidification container 1, which was insufficient. On the other hand, the solidified waste in the form of a powder bed is stored in a solidified material hopper 2, and the amount of solidified waste is distilled in a weighing hopper 3 with assimilation. In addition, the waste is dried and powdered and stored in the powder hopper 7.
- Weigh the powder waste in the powder waste 81 clothes hopper 8. The weighed powder solidified waste and waste are transferred to a powder mixing device 13, homogeneously mixed by a stirring motor 14, and then filled into an empty solidification container 1. Next, a solidification container filled with a homogeneous mixed powder of solidification material and waste is
jE Children's School Kasui wo/Zou Kasui Kundo fi 714 j, 9
By hardening the solidification in the container, the solidification in the container is fixed. Next, apply a tray 11 to the container, and set the Tanhi hopper 1371 island to a constant *4.
Filling is performed on top of the solidified solidified material 11, additional water is injected, and post-filling 12 is performed, followed by tabulation of the surface-forming amount 10'i-.

Next, a more specific embodiment of the present invention will be explained with reference to FIG. In this disaster example, the powdered solidified phase of special water glass and hardened iJ #iM'J were used *1, and the solidification container was a thin wall amorphous container such as polymer impregnated concrete (PIc). However, the present invention does not rest on this for the sake of congratulations. In Fig. 3, the solidification container 1 is advanced to the filling section by the empty container conveyor 39, and the container is raised and lowered. 4) Container light horizontal cap placed on 36
The light green is pushed up until it comes into close contact with the edge 31 of the candle 0.

On the other hand, prior to collection, the waste is stored in the powder waste hopper 7 after a predetermined drying and powdering process, and the powder k
A Fruit is transferred to weighing unit 8 and weighed. At this time, a load cell 16 for dissecting the waste powder is installed in the powdered corpse confectionery proportioning unit 8, and when the amount reaches 1, the embryo cold sample 1 switch 17 is installed. The waste transfer valve 15 is then used to complete the punching process.

On the other hand, the solidified phase is stored in the solidified material hopper 2,
The awns are transferred to the crime-prone needle hopper 3, and weighed with their feet placed. At this time, a load cell 2o for measuring the solidified material is installed in the assimilated material measuring potper 3, and the solidified material in powder form/
(If it is too late for the child to reach 31 r feet), the solidified material weight-resistant switch 21 is used to stop the rotary feeder 19 for transporting the solidified feathers, and the assimilation process is completed.

The waste and solidifying material weighed in this manner are transferred to the powder mixing device 13. In this case, the waste is transferred from the powdered waste fruit weighing hopper 8 to the rotary feeder 18 for transferring one-shot fruit, and the solidification material is transferred from the solidification material hopper hopper 3; 2
2. The solidified powder is transferred to the powder kneading device k13 via the transfer valve 23. In addition, at this time, leave the post-filing, the fixed crime transfer for 2s squares and 24 Buddhas in the closed state. The waste and assimilated materials transferred to the mixing device 13 are homogeneously stirred by the mixing motor 14.1. A homogeneous mixed powder of Fe fruit and one patch of assimilated material is produced.

On the other hand, when adding water to water, vJ ≦ Toguchi water supply book thread yoshi water addition h1°
Saturated water 1 is supplied to the blood tank 4. An additive water level switch 27 is installed in the test tank 4, and when the water level in the tank 4 reaches a certain level, an additive water connection valve 26 is activated. Close the lid and add water. Additionally, the tank 4 of the added water meter is equipped with an added water cooling device 29.
Temperature 11i1J The temperature of the added water is controlled by the water switch 37 to about θ°C to 10'C. The reason will be explained later.

Now, as described above, the solidification container 1 is pushed up by the container elevator 36 and is sealed by the gasket provided on the peripheral edge 31 of the container filling cap 30. The container filling cap is equipped with a line for filling the mixed powder of waste and assimilation material, a line for filling the solidifying material, and a line for injecting added water. When the solidification container is in the above state, first, the ingredients are mixed at a predetermined ratio! jp, -MI: The mixed powder of the substance and the assimilate is supplied to the 1st via the mixed powder filling valve 25 from the mixing device 13.
A predetermined amount is filled into the chemical reactor 1. Here, the container lifting device 3
A vibrator 35 is attached to 6, and by applying vibration to the assimilation container, it improves the filling of the packed powder to a good degree and flattens the surface of the packed powder. Next, add the added water whose temperature has been adjusted in the added water measuring tank 4 through the added water injection valve 28,
A predetermined amount is injected into the assimilation container 1 filled with powder. Powder solidifying materials such as special water glass generally cause the temperature of the added water to rise. Therefore, if the temperature of the additive water is too high, the assimilate will quickly dissolve in the upper tvi part of the assimilation vessel when the additive water is injected into a paste, the viscosity will increase, and the additive water will reach the bottom of the solidification vessel. It becomes difficult to penetrate. In order to prevent this, in this embodiment, the cooling device 29 is provided in the added water measuring tank 4 as described above, and added water at a cold temperature is injected into the assimilation container. After pouring the added water, leave it for about 10 to 20 minutes and wait for the added water to penetrate.After that, leave the container 1 still in the tank and raise it. With the bale 36 in the lowered awn state, the container Shun 11 is placed in the covering device 3.
2 and set the solidification benefit to 1. This container lid 11 is
Made of porous concrete (with a 1l11 volume) and 6
C.

Water is absorbed from the wet layer in the upper layer of the powder due to the high hydration rate. In addition, by pressing down the container lid 11 with the MM lid device and pressurizing the solidified body 10, the penetration of moisture is ensured.

After setting the container lid 11, in order to perform post-filling, the solidifying container 1 containing the solidified material 10 is pushed up to the filling cap 7"30. The solidifying material tJkl is introduced into the solidifying container 1 through the post-filling transfer valve 24 from the solidifying material tJkl into the solidifying material t'1. to fill the gap between the container 1 and the container lid 11 to 90% with the solidifying material.At that time, add the specified amount of secondary water again from the added water meter tank 4 to the lid, leave it as it is for about 1.0 minutes, and then The solidification container is moved from the lifting table 36 to the solidified material transport conveyor 33, and is transported to the solidified material curing device, thereby completing a series of assimilation processing steps.

In addition, 1 powder m Serum Honno'? 7. Powder waste fruit resistant hopper 8, mixing device 13, reactor filling cag, inside of assimilation container 1 when in close contact, is always maintained at negative pressure by pentoblower 37, and radioactive magic fruit in the form of fine powder comes out of the thread. prevent the spread of
The pent gas is then processed by a pent filter 38.

In addition to the young fruits described in the section on the effects of the invention, the above-mentioned fruitful examples have the following specific effects. Because we use Tochi's non-voluptuous physical examination equipment such as PIC, we are able to produce an assimilated product that has no negative effects as a whole, and therefore has excellent long-term stability and durability.

(2) By controlling the temperature of the additive water to a low temperature, when injecting the additive water into a container filled with waste and solidifying material, early dissolution of the solidifying material in the powder upper layer aU1 is prevented, and the addition Water can easily penetrate to the bottom of the container.

(3) The lid of the container is made of porous (breathable) concrete, and in some cases, water molecules are absorbed from the wet layer in the upper layer of the solidified body facing the additive carrier, and the added water rate is It is a homogeneous assimilate structure or El ability throughout. In addition, by pressing the container head and pressurizing the solidified body, it is possible to ensure that the added water passes through and to obtain a very strong solidified body structure.

(4) Since a pentline is installed in equipment handling powdered waste fruit and vent gas is treated with a vent filter, it is possible to prevent the spread of radioactive materials.

The above-described embodiment is an out-drum type in which the raw powder and solidified powder are mixed in advance outside the solidification container, or another embodiment of the present invention is SWb. Work'
An actual example of the India 2M method is also possible, in which homogeneous mixing of the lx powder and the solidification material powder is carried out in a solidification container. That is, the powder mixing device 13 is omitted, and the washed confectionery powder is directly poured into the solidification container from the container lid HO-8, and the solidification material is directly transferred from the container lid HO-8 to the solidification container 91, respectively. The waste powder and the solidified powder are homogeneously mixed in the solidification container using a simple stirrer, and the subsequent steps are the same as those in the previous embodiment. In this case, the simple stirrer is preferably installed in the container filling cap 30 so as to be automatically moved up and down within the container filling cap and the solidification container in contact with it. According to this embodiment, the mixing device 1 in the previous embodiment
If 81L13 can be omitted, the system will be much simpler and less detailed. In addition, in the cold water injection process, 1. If the permeability of the added water into the powder in the mixing container deteriorates, it is possible to promote the mixing of the powder and the added water by one stirring.

In addition, in the embodiment shown in FIG. 3, the powder mixing device 13 is provided with a 6-cooling device, or in the embodiment 2 of the above-mentioned indo drum, Ho, Puff or 8 and Hotno or 2 or 3 are added.
By using anti-corrosion equipment and picking the industrial waste powder and 1 crime powder to the low temperature side to control the storm, the temperature of the powder should be 1 lm unless added water is injected. (This prevents the solidifying material from turning into a paste in the bath at an early stage, and since the viscosity of the added water does not increase, it is possible to easily penetrate the added water to the bottom of the assimilation vessel.) When used in combination with the above-mentioned water and water control, its infancy becomes a reality in history.

It is also possible to install an air witness line in the container filling cap 30, to remove the added water into the solidification container with a diagonal, and to pressurize the container with air from the top of the container to promote the penetration of the added water. In this way, the water added to the vessel will penetrate more easily, so the filling of the mixed powder of waste material and solidification material into the solidification container will be improved, and the total loading ratio of light debris will be reduced. To further increase it is "J'k".

In addition, in the above-mentioned disaster MJA I1, mix the arsenic compound of the rough cutting part of Hashira Arashi with the # body of Ha I3 fruit and solidification material ~
In particular, it is possible to increase the 10J gap in the mixed powder l\ to make it easier for the water added to penetrate into the water. substances (KCL,
KNO, etc.)? It is also possible to make it easier for the added water to penetrate into the powder by lowering the viscosity of the added water through cooling and decomposition.

Cement powder can also be used in place of the glass powder cup as an inorganic negative solidifying material powder that starts to degrade water.

[Young fruit of “Hayu”]

Un”z6　B) If you use J, you can get the young fruit of Gero.

(The process of hardening the hardening material occurs inside the solidification container, and it does not harden outside the assimilation container, so it becomes impossible to arbitrarily set the hardening material in the equipment and arrangement outside the hardening container.) (2) Therefore, it is necessary to commit crimes against equipment and piping.
No labor is required, and the occurrence of gauze waste and its disposal are greatly reduced.

(3) Cross-wire stirring to make the solidified material into a paste before φ,
.

Also, the production of solidifying material paste and waste fruit powder collecting and stirring was not disclosed, and the system was changed to 11. ” Speed up 8.

(4) Even if the solidifying agent is homogeneously mixed with the solidifying agent and the powder in the mixing chamber, the hardening of the solidifying agent will not be possible if the solidifying agent is stirred during the mixing. By spooning, you can eliminate the trouble of using a stirrer for mixing by hand.

[Brief explanation of drawings]

Figure 1 is a flowchart of an in-drum leveling treatment system for powder solidification as compared to Japanese Patent Application No. 58-37077, and Figure 8142 is a flowchart of an assimilation treatment system according to an embodiment of the present invention. Figure 3 is a diagram showing the structure of the assimilation treatment system according to the embodiment of the present invention as shown in Figure 6 above. F-4...8 pieces 17I (1 filter tank 5...Solidification and abrasive mixing tank 6...Agitation ridge 7...Powder waste hopper 8...Powder pumping and unloading hopper) 9... In-drum stirrer 10... Solidified body 11...
・Container lid 12...Boston filling 13...Mixing mixer installation 14...Morph for mixing 15°°° Corpse transfer valve 16...Load cell 17 ...Waste 1 sub-switch 18...Rotary feeder for transferring powdered fruit 19
...Load feeder 20 for transferring solidified material...Load cell 21 for solidification plan i...Solidization material transfer switch 22...Rotary feeder 2 for transferring solidified material 2
3...Solid offense transfer valve 24...Bost filling similar offense transfer valve 25...
Mixed powder filling valve 26... ＼ Water supply valve 27...
Added water level switch 28... Added water injection valve 29... Added water cooling container 3
0... Container filling cap 31... Noya Tsukin 32.
... Container closing device 33 ... Conveyor for carrying out solidified material 34 ... Solidified material 35 ... Vibration mode 36 ... Container lifting machine 37 ... Pentoprower 38
...Vent filter 39...9 volume E = conveyor
m-” Continued from page 1

Claims (1)

[Claims] 1. After light-filling the radioactive waste powder and the radioactive waste powder, which are mixed with the liquid of 1. , hardening υ1 into a homogeneous mixture of light-filled solidified I powder and radioactive waste powder in a solidification container.
A method for homogeneous solidification of radioactive confectionery, characterized by injecting an initiator liquid. 2” A special edition in which water glass or cement powder is used as the solidified horse chestnut powder, and water is used as the curing initiator liquid.
Radioactive waste in the range of i+ice, item 1 ■Kyunka solidification treatment method. 3. The step of homogeneously mixing the powdered material and the radioactive No. 13 fruit bladder in a solidification container is to homogeneously mix these surrounding powders outside the assimilation container in advance, and then solidify the homogeneously mixed powder. Special W+/ship ice range 1 consisting of light lying in the container
Homogeneous solidification treatment method for radioactive waste in Section 2 or Axis 2. 4 Put the solidifying material powder and the radioactive waste into the solidifying container. Put the solidifying material powder and the radioactive waste into the solidifying container. Then, mix both powders homogeneously in the solidifying container. The homogeneous solidification treatment method for radioactive waste in the i-term or the second fox. Homogeneous solidification processing power method for radioactive waste as described in Item 2, within the range of the axis needle 1, which displaces the body by 1v.6. Homogeneous solidification treatment method for radioactive waste as described in Paragraph 2 of chilled mortar ice &1. After injecting the initiator, pour it into a solidification container and pour the solidification agent powder onto the lid.
- The homogeneity of the radiant corpse □ according to any of the embodiments of claims 1 to 6 is obtained by pouring 1 part of a patterned IjD initiator into the solidified material and applying Boston Illing to the solidified material. Solidification treatment method. □