JPS6013297A - Method and facility for treating 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] The present invention relates to the treatment of radioactive materials.

The literature on the Keiin Hayabusa goes on to point out that solid vessels are suitable for simply being buried under the surface soil as low-level animal waste (LLW). 1 shot of fever > object or high level vessel, certain object (tl L W
) is generated from the high U9 radioactive fuel reprocessing fluid. Intermediate waste falls between these types and is in solid form. It is with this latter type that the present invention is concerned.

Existing /1 facilities for processing Ij741 toxic and/or toxic waste (understand that this term includes radioactive nuclear fuel and enriched fissile material)
．． In the proposed route 2), careful consideration is given to burying on land, dumping in NffIH, or burying in the bottom of γfII or the deep seabed. The main risks associated with these routes are: (1) exposure to humans through potable water flowing through groundwater veins, or through fish or seafood that has absorbed radiation or toxins from seawater or the ocean; Ingestion by.

(+1) Unexplained interference with waste.

In order to ensure the safety of burying underground water sources for drinking purposes on land, a careful and extensive A1 survey of the surrounding water system is essential. Although the rate of migration can be reduced, over a long period of time it is expected that radioactivity and/or toxins will accumulate in the drinking water supply. However, if the actual transfer of radioactivity and/or toxins bypasses the drinking water supply and reaches the ocean, it will be diffused under the name of natural VC, making it safe enough for treatment within the drinking groundwater environment. It will be done.

Dumping in Shenshang requires complex procedures for transporting the waste through public areas. power) also
There are management restrictions regarding the accumulation and collection of radioactivity and/or found objects in the halo waste millet. Another problem is due to the T7J's potential for unauthorized interference, making accurate surveying, investigation and monitoring difficult.

burying the waste underground close to the shoreline so that any water that has flowed through the body can drain away into the sea, or the waste is below the beach or shallow water of the shore; It consists of things.

The present invention also includes a radioactive waste treatment facility using the method described above.

In order to fully understand the present invention, a radioactive waste treatment facility according to the present invention will be explained with reference to the accompanying drawings.

FIG. 1 shows a radioactive material waste treatment facility consisting of a plurality of artificial cells 1. Each cell can accommodate a number of waste disposal drums filled with radioactive material.

FIG. 2 shows a plan view of a standard cell, the location of the bδ waste disposal drum being represented by the circle indicated by reference numeral 2. Each cell 1 has a side wall, an end wall 3 and a floor 4 (third
Figure) It is made up of 1 piece. The cell is completely filled by the waste treatment drum = lr - (' , +7.
t'+[I Gj: l'rl 1i! j j tatama-
(Narateshi to J5). Also, it shows the name 1 of the 7j 3-yaku system of the drum/river on the 212th day j1 each 1
The column is stored in a container 5 (Fig. 13, Part 1 e), and this container has a 1μ contact as shown in Fig. 5.
11Q is attached to the Torotsu j6 on the rail 7 placed between the doors. +11 is applied to rail 7c'i single conveyor rail/l-8, and as shown in FIG.
VCi'l! We can continue to contact you. The transport rail 8 has a starting point at a position 10, and from this starting point, with the help of an elevated crane 12, cargo handling f1 can be carried out from the track 1/11 to the transport trolley 6.

1.3 and ≠Explanation of Figure 1-, elevated crane 13
Cargo handling work is carried out in each cell using six transport trolleys. Crane 13 (well, rail 14
” In the second, it is possible to traverse the evening l of the cell (at!!τ
Ru. 1% overhead crane 13 & 9 rams D1 constant 4iL
While the acid is placed in the upper part of the drum, a shield (948) is installed to absorb radioactivity.
After finishing the installation, install the door 15 in the predetermined position.

During the packing work, 16 movable concrete shielding walls (16) are placed in front of the rows where work is being carried out. A pipe 17 for pouring liquid concrete is provided between the drums 2. After installation, the drum filled with radioactive material can be secured in a shielded state. Figures 1 and 3.
As clearly shown in the figure, there are 74 iso and 18 crabs installed at the upper and lower positions for drainage.

Once the facility is turned into a ditch by the drums and the top is cut off like they are, the means to transport the drums to the Hill and load the drums into the cells are disassembled and removed.

It is shown in the first and third figures that a space is left between the side walls 3 and the lower floor 4.

For this reason, after all the cells have become trenches, the wells are filled with a material with low permeability, such as soil, and d19 is emptied.
can be put in. Apart from this, quality fillers can also be used to improve drainage. In Q), a top covering (1) of clay 20 is placed on the cell roof formed by concrete plugs 15, as shown in FIG. Most? Step 4: Fill the clay-filled cell with enough thick soil to form an embankment 21. Additives may be added to the embankment 21 and/or the clay cover 20 to minimize the migration of radionuclides.

Limestone and iron ore waste are one suitable additive.
Used alone or in combination and/or in suitable materials. Additives have the effect of adjusting the pH and potential of the drain from the ditch, adjusting the pH and potential, and adjusting the 1°11 total fjlJ. ,−
The pH and oxidation level of 11% are Ij, and the oxidation rate is 11%. +
It reduces the 6′1 dissolution of most of the nuclei 1 (equivalent to 5 substances), and as a result, suppresses leaching and reduces the movement of nuclides.
W. Beall's investigation of radiation sorption in natural ores (1, 2nd B!-2nd, 6th page, ONF 003)
107. /7. There is useful information in r/Year≠B (USIJOE Publishing), and I will make this into 6 thoughts.

The 61st part 1 is the + of the drainage canal 18 and the facility drainage canal 22 of the order
! ! ! hj R'? The precepts are expressed in the form l=j. This facility location] 1. The waterway is installed at sufficient depth,
Drainage water is collected in a collection tank 23. In addition, surface water t,
3H: Below 72, there is a soil drainage channel 24 of the same depth. This υF waterway is not connected to the collection tank 23. The water exiting the collection tank 23 can be drained to 7(σ), and any evidence of radioactive flow tB can be seen and/or can be allowed to flow down into the buffer passage. .

It is preferable that the above-mentioned drainage connection system be operated appropriately by the function of the pancreatic observation equipment, so that information on the height of the groundwater table at certain times can be obtained. If the water table is too high, it can be removed by separate drainage facilities. These monitoring capabilities ensure the overall security of the processing system. These installations utilize a number of monitoring locations that connect the connecting f/l: water channels and monitoring stations that can monitor the status of each through hole. As a result, the exact operating state of the drainage system can be determined and, if necessary, the presence and location of defects or adverse conditions can be identified. Figure A6 shows the arrangement of the connecting drainage channel that ends at the collection tank 23. Water from the tank can be monitored for radioactivity. A continuous connecting drainage channel containing sewage at the base of the ditch is
An outlet can be provided at a predetermined point by a through hole. If the groundwater level rises to the warning point at a predetermined time, the groundwater level is lowered by using another drainage channel = 1a.

Furthermore, a specific through hole has a trace (trBcer) of 0.
♀You can also fill it with liquid and close it with a stopper. If the tracer can be detected through the trace's X1 hole, it means that the connection is successful; If it becomes clear that the drainage channel 18 is not flowing properly, the drain can be cleaned and disposed of. Through hole (VCm after drilling is IJf)
Even if the water (preferable) is clogged with silt, it can be cleaned using gentle backflow.

Iwamata fII! It has been found that a slow flow of water passes through the monitoring system due to natural infiltration through the geological formations, and this flow is distinguishable from the much faster flow through the connecting drains described above. However, this! Both flows mix while reaching the monitoring system.

In the example of a wheel pitcher or installation shown in Figure 7, the water table is lowered to sea level below the vessel, so that it is not used for drinking water. This end view shows land 50 along the coast,
A ditch made of a sewage drainage channel 51 with a head is shown.

This R4 extends to the sea in a direction perpendicular to the plane of the drawing. Seki tide level is represented by 52, and low ta level is represented by 53. These tidal levels allow cleaning to be carried out at different levels of the tide. The fir is constructed of coarse crushed stone 54. This crushed stone is also used for the drainage channel 51. Moreover, R4 has a concrete lung wall 55 (1:4) for the Ayu fish 56. This part is equipped with an absorbing ceiling 57 and a bottom 58. There is a 1%59 lily between the bottom and the drainage canal made of coarse crushed stone.60 clay sills and 61 sills are installed.

In a modified example (not shown), Ul.

A clay barrier may be provided in the waterway to allow wastewater to collect within the barrier before flowing over the barrier. As a result, before discharging water to 771J, it is possible to carry out visual work1 and to drain the passage filled with absorbent material.

Fig. 1/g will be explained from Fig. g. A number of partitions or cells 30 are formed in concrete walls 31 and a floor 32. The bed is formed on clay 33 of sufficient thickness. The side wall 31 has a space (!ift1) where the clay 34 will be filled after Ni'j filling of the partition room is completed.The cargo handling equipment 0111 for the drum 35 containing radioactive materials It is the same as the one explained with reference to the figure, and when the work is completed, it will be disassembled and removed in the same way.

The transport container 3G is transported by a transport trolley 37K on the rail 38.
The drums 35 can then be lifted up by an overhead crane 39 on rails 4° and placed in rows in successive compartments.

As seen in the figure, the transport container 35 on the trolley 37 is moved to the track link 41 by the elevated crane 42.
Supplied from. After pouring concrete around the drums in the cylindrical row using the pipes 44, a concrete grug 43 is installed at a predetermined position on the ceiling of the 4'11-mounted drum 35, and a clay ceiling cap 45 is placed at a predetermined position. and f
l+! One part is integrated with the filling part 34.

Waste disposal facilities are conveniently located away from the coast. An example of umezo is shown schematically in Figure 1/. In this example, a temporary dam 46 is constructed that surrounds the rice and fruit processing facility by 11' and extends outward from the coast.

This would involve excavating inside the dam area and constructing a 15B waste treatment facility at a lower water level than during low tide. After the treatment facility is installed, concrete is poured, a clay cap 45 is installed, and all or part of the dam 46 is removed.
The treatment area 47 is irrigated.

Gravel and/or nuclide sorbent material can also be used as the outer fill surrounding the facility, and any hard-to-move deposits of mud or sorbent material can be flushed away with Itc water.

[Brief explanation of drawings]

Figure 7 shows the -D installation t! where the drainage channel heads towards the sea. 1′ε
FIG. 3 is a schematic partial cross-sectional view. 51 yen - Figures are seven enlarged plan views of the processing cells shown in FIG. 1. FIG. 3 is an end view taken in section along the line III in FIG. 2. Figure ≠ is an abbreviated sectional view taken along line IV-IV in Figure 2. FIG. 2 is an abbreviated plan view of the facility system shown in FIG. 1, showing details of the transport equipment 1. FIG. 2 is a schematic 16i plan view of the waste water collection equipment for the facility shown in FIG. 1. Figure 7 is an end view of the pond, with the drainage channel facing the sea. Figure g is a plan view of the facility where waste is buried below the beach level. 3 Figure 2 is a sectional view along Ix-rxm of Figures i and r. FIG. 1θ is a vertical cross-sectional view taken along line X-X in the first figure. Figure 1/Figure 1 is an abbreviation 1 showing one method of installing the facilities shown in Figures 1 to 1. J, 3020, 2, 35: Drum, 3,31
: Concrete wall, 4.32: Floor, 5.36: Container, 6
．． 37: Trolley, 7: Rail, 8: Vertical rail%9
: Rotating table, 12, 13.42: Elevated crane,
15.43: Concrete 0 lag, 1G:'jii,
Covering body, 18.22: Drainage channel, 20: Ji15 soil N11 I, 21: IJIL soil, 23 2 Jilr collection d 7
33, 34: Clay 146: Dam, 47: Disposal area, 50: Land, 51: Drainage canal, 52: High tide level, 53
:Low r1ri'' rank, 54: Nei crushed stone, 55: Pillar wall, 56
: 15 waste, 57: absorption ceiling, 58: bottom, 59: gravel layer, 60: similar to clay, 61: ceiling hunting. 1' prefecture of the drawing: ('tff1.=no change)Fig
, 3゜Fig, 4゜Procedure Sode Ichi Kei - (Method) Commissioner of the Patent Office Manabu Shiga 5 drums. 1, Case Table 7]: 1981 Patent Application No. 55211 3. Relationship with the person making the amendment: Date of amendment: June 26, 1981 clear til+
11- and engraving of the drawings (no changes in content).

Claims (1)

[Claims] A. In the method of treating radioactive waste, any water that has flowed through the treatment body can be drained into the sea, or the waste can be disposed of at a place lower than the sandy beach or shallow water of the coast. A disposal method that involves burying waste underground near the coastline. , 2'I''J'i!'I'CAUTION) In the method described in item 1, the release rI-1t'l: waste Y) (near the object, prevents the movement of radionuclides. 3. In a radioactive waste treatment facility using the method described in paragraph 1 or any of paragraph 1 of the patent claims,
V of any water that has flowed through the treatment body ("to allow the water to flow into the sea and without incorporating at or incorporating absorbers to enhance the prevention of radionuclide migration near the waste") A treatment facility in which waste is buried underground in the vicinity of a radioactive waste treatment facility. So that the object is lower than the sandy beach or shallow water of the coast,
and treatment facilities in which waste is buried underground close to the coastline, with or without absorbers installed near the waste to enhance the prevention of radionuclide migration. A treatment facility according to claim 3 or 1, wherein the absorbent body is made of clay containing soil or containing no soil. Party B, in the processing facility described in claim 5,
Treatment facilities where the clay and/or soil contains one or more additives that minimize the transfer of radionuclides. 2. A processing facility according to claim 6, in which limestone or iron ore waste, or a mixture of both, is used. In the facility described in claim 3, there is provided a cell with concrete walls and a floor for storing radioactive waste contained in a drum, and a cell with concrete walls and a floor, the drum being transported to the cell, and an upper part of the cell. Disassembly means for attaching a drum to said cell through an opening and adjacent to said cell for transferring wastewater to a collection tank and means for monitoring the collected water. After thorough monitoring of the drain passage, the water from the front ftj 1i was drained into the drainage channel 11J, which was completely closed by the ram 1-C1.
Additionally, there is a concrete roof attached above, around and below the cell: +'<-
A processing facility equipped with a fly body. 7/I Exploration In the facility described in If paragraph g of the claims, an outlet is installed at a predetermined location of the connection system of the 1;1 water passage, and the terminal t11δ is written as 0! The through hole connected to the KJ viewing means (iii/Ederu F! Ji facility. 10, 'I'! In a processing facility in which the through hole is filled with a tracer liquid resistant liquid and the tray liquid is retained using a stopper. '
7 (along the σ shore, a trench constructed in a plurality of cells for radioactive waste, and a sewage drainage channel with a head for said trench extending to the sea via collection means and monitoring means; Equipped with
Furthermore, said cell has an inclined conc')-)ill, an absorber at the top and bottom of the completely packed cell, a gravel layer forming the base of the cell, and a layer of gravel surrounding the cell and filling said groove. The treatment facility is constructed of crushed stone, and is constructed in such a way that the sewage drainage canals are washed with seawater at each rise and fall of the tide. /, 2. In the facility described in Clause 1 of the scope of the special d-F request, there is a cell with concrete walls and a floor for storing radioactive waste in a drum, and the drum is transported to the cell and the cell is removable means for loading the drum into said cell through the upper opening of said drum, and further comprising a core completely enclosed by said drum and attached to the core 91.1-IJ, □1. ,
A treatment facility comprising all the upper, peripheral I'l+, and lower 1, II inlets of the cell.