JP2010037132A - Device for manufacturing ammonium diuranate particle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for manufacturing ammonium diuranate particles having preferable sphericity. <P>SOLUTION: The device 1 for manufacturing ammonium diuranate particles includes a storage tank 2 for storing an ammonia aqueous solution and an oscillation means 3 for rocking the storage tank 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ammonium heavy uranate particle manufacturing apparatus, and more particularly to an ammonium heavy uranate particle manufacturing apparatus capable of manufacturing ammonium heavy uranate particles having good sphericity.

  According to Non-Patent Documents 1 to 5, HTGR fuel is generally manufactured through the following steps. First, uranium oxide powder is dissolved in nitric acid to form a uranyl nitrate solution. Next, pure water, a thickener and the like are added to the uranyl nitrate solution and stirred to obtain a uranyl nitrate-containing stock solution. The prepared uranyl nitrate-containing stock solution is cooled to a predetermined temperature, adjusted to a viscosity, and then dropped into an aqueous ammonia solution using a small-diameter dropping nozzle.

  The droplets dropped on the aqueous ammonia solution are sprayed with ammonia gas before reaching the surface of the aqueous ammonia solution. The surface of the droplet is gelled by the ammonia gas, thereby preventing deformation when reaching the surface of the aqueous ammonia solution. Uranyl nitrate in the aqueous ammonia solution sufficiently reacts with ammonia to form ammonium heavy uranate particles (hereinafter sometimes abbreviated as “ADU particles”).

  The ammonium deuterated uranium particles are dried and then roasted in the atmosphere to contain more oxygen than uranium dioxide, resulting in uranium oxide having an oxygen: uranium molar ratio greater than 2, eg, uranium trioxide, Reduction and sintering result in high-density ceramic-like uranium dioxide particles. The uranium dioxide particles are sieved, that is, classified to obtain fuel nuclei having a predetermined particle size.

The fuel nuclei are loaded onto a fluidized bed, and coating is performed by thermally decomposing the coating gas. The coating layer is formed by coating the first layer, the second layer, the third layer, and the fourth layer from the fuel core surface. In the case of the first layer of low density carbon, it is obtained by pyrolyzing acetylene (C ₂ H ₂ ) at about 1400 ° C. In the case of the high density pyrolytic carbon of the second layer and the fourth layer, it is obtained by pyrolyzing propylene (C ₃ H ₆ ) at about 1400 ° C. In the case of SiC of the third layer, it is obtained by thermally decomposing methyltrichlorosilane (CH ₃ SiCl ₃ ) at about 1600 ° C.

  In general fuel compacts, the coated fuel particles obtained as described above are pressed or molded into a hollow cylindrical shape or cylindrical shape together with a graphite matrix material composed of graphite powder, a binder, etc., and then fired. Obtained.

S. Kato "Fabrication of HTTR First Loading fuel", IAEA-TECCDOC-1210, 187 (2001) N. Kitamura "Present status of initial core fuel fabrication for the HTTR" IAEA-TECCDOC-988, 373 (1997) Kimio Hayashi, “High Temperature Engineering Test Reactor Design Policy, Manufacturability and Comprehensive Soundness Evaluation” JAERI-M 89-162 (1989) Kazuo Tsuji, “Development of Advanced Technology for HTGR Fuel Production” JAERI-Research 98-070 (1998) Hasegawa Masayoshi, Mishima Yoshimi supervision "Reactor Material Handbook", published on October 31, 1977, pages 221-247, Nikkan Kogyo Shimbun

  On the other hand, when manufacturing nuclear fuel using nuclear fuel materials such as uranium, as a method to prevent criticality accidents, in general, the "mass limit" that the amount of uranium handled is less than the critical mass, and the amount of uranium is Regardless of the shape and dimensions that do not cause criticality, the “shape restriction” handles uranium.

  In the case of “mass restriction”, the maximum handling amount for uranium having a concentration of 10% or less is 9.6 kg, and the maximum handling amount for uranium having a concentration of 20% or less is 4.0 kg. Therefore, the batch size in each manufacturing process needs to be below these values. Further, from the viewpoint of safety, considering the case of double loading by mistake, the batch size in each manufacturing process needs to be 1/2 or less of these values. Therefore, the productivity of nuclear fuel deteriorates and it cannot be said that it is suitable as a criticality management method for mass production facilities.

  On the other hand, in the case of “shape restriction”, the size defined by the enrichment and shape of uranium varies. For example, when the size of the manufacturing equipment for uranium with a concentration of 10% or less is a cylindrical shape, the diameter of the cylinder is 19.8 cm or less, and the shape of the manufacturing equipment is a flat plate, The thickness of the flat plate is 8.3 cm or less.

  In addition, when the size of the manufacturing equipment for uranium with a concentration of 20% or less is a cylindrical shape, the diameter of the cylinder is 17.4 cm or less, and the shape of the manufacturing equipment is a flat plate, The thickness of the flat plate is 6.7 cm or less.

  Since there is no limit to the amount of uranium handled in these production facilities, “shape limitation” is preferable as a criticality management method for mass production facilities. However, as described above, since the dimensional limit value in the “shape limit” becomes smaller as the uranium becomes highly enriched, the facility for manufacturing the fuel core must be an elongated cylindrical shape or a thin flat plate shape. Absent.

  For example, as described above, a droplet of a uranyl nitrate-containing stock solution dropped into an aqueous ammonia solution reacts to generate uranyl nitrate. The uranyl nitrate in this aqueous ammonia solution reacts sufficiently with ammonia to form ammonium heavy uranate particles.

  The produced ammonium heavy uranate particles are further loaded on top. For this reason, the ammonium heavy uranate particles dropped and generated earlier are deformed by the weight of the ammonium heavy uranate particles placed thereon. Due to this deformation, there is a problem that the sphericity of the produced ammonium heavy uranate particles is deteriorated.

  As means for solving the above-mentioned problems, for example, a method of flowing ammonium heavy uranate particles by circulating an aqueous ammonia solution from below to above the ammonium heavy uranate particles can be cited.

  However, when the above method is used, when highly enriched uranium is used as a raw material, the tank for storing the aqueous ammonia solution becomes an elongated cylindrical shape or a thin flat plate shape in order to cope with the above-mentioned shape limitation. . Therefore, since the tank to be used is limited in shape, the ammonium heavy uranate particles cannot be sufficiently fluidized only by circulating the aqueous ammonia solution from below to above. Therefore, the deterioration of the sphericity due to deformation of the ammonium heavy uranate particles becomes a problem again.

  It is an object of the present invention to provide an ammonium heavy uranate particle production apparatus capable of solving such conventional problems and producing ammonium heavy uranate particles having good sphericity.

As means for solving the above problems,
Claim 1 is an apparatus for producing ammonium heavy uranate particles, comprising a storage tank for storing an aqueous ammonia solution and a peristalizing means for peristating the storage tank.
The storage tank has a plurality of partition plates arranged at predetermined intervals in the vertical direction,
The plurality of partition plates each have a communication portion that communicates adjacent spaces partitioned by the storage tank and the plurality of partition plates,
The said communicating part is formed in each partition plate so that the flow direction of the fluid which flows through the space formed by the adjacent partition plate may be opposite to the flow direction of the fluid in the adjacent space. 1 is an apparatus for producing ammonium biuranate particles according to 1.
According to a third aspect of the present invention, the communicating portion is formed at a position opposite to the central axis of the storage tank parallel to the vertical direction from the communicating portion of the adjacent partition plate. An apparatus for producing ammonium uranate particles,
A fourth aspect of the present invention is the ammonium heavy uranate particle producing apparatus according to any one of the first to third aspects, wherein the storage tank satisfies a shape restriction.
A fifth aspect of the present invention is the ammonium heavy uranate particle producing apparatus according to any one of the second to fourth aspects, wherein the partition plate contains a neutron absorber.
In a sixth aspect of the present invention, in any one of the first to fifth aspects, a plate-like member including a neutron absorber is provided on the outer peripheral surface of the storage tank so as to sandwich the storage tank. It is an ammonium heavy uranate particle manufacturing apparatus of description.

  According to the present invention, it is possible to produce ammonium biuranate particles with good sphericity by having a storage tank for storing an aqueous ammonia solution and a peristalizing means for peristating the storage tank.

  Hereinafter, an ammonium heavy uranate particle manufacturing apparatus (hereinafter, also referred to as “ADU particle manufacturing apparatus”) according to an embodiment of the present invention will be described with reference to FIG. However, the ADU particle manufacturing apparatus illustrated in FIG. 1 is an example of the present invention, and the ADU particle manufacturing apparatus according to the present invention is not limited to the ADU particle manufacturing apparatus illustrated in FIG.

  As shown in FIG. 1, the ADU particle manufacturing apparatus 1 includes a dropping device (not shown), a storage tank 2, and a peristalizing means 3.

  The dropping device is a device that drops a uranyl nitrate-containing stock solution containing uranyl nitrate into the storage tank 2. This dripping device has a nozzle. The nozzles only have to have a predetermined inner diameter. When the uranyl nitrate-containing stock solution is dropped, illustration is omitted, but each nozzle is dropped and / or dropped in the uranyl nitrate-containing stock solution. By vibrating in a direction orthogonal to the above, a uranyl nitrate-containing stock solution described later is dropped.

  Although there will be no restriction | limiting in particular if arrangement | positioning of the dripping apparatus can be dripped at the storage tank 2, For example, it is preferable to arrange | position on the central axis X1 of the storage tank 2 parallel to a perpendicular direction. In this way, the ADU particles formed by the dripped uranyl nitrate-containing stock solution are less likely to collide with the storage tank 2, and deformation of the ADU particles can be reduced.

  The storage tank 2 is provided below a dropping device (not shown) and stores an aqueous ammonia solution that reacts with the dropped uranyl nitrate-containing stock solution. The storage tank 2 has, for example, a flat plate shape as a whole. Examples of the cross-sectional shape of the storage tank 2 include a polygonal shape, a circular shape, and an elliptical shape.

  In addition, it is preferable that the storage tank 2 has the injection | throwing-in part 2A opened only in the upper surface part corresponding to the location where a dripping apparatus is arrange | positioned, and is formed in the airtight shape. If it does in this way, the fluctuation | variation of the density | concentration by vaporizing the ammonia aqueous solution to store can be suppressed.

  Furthermore, the storage tank 2 has a discharge part 2B that discharges ADU particles. The discharge part 2B should just be formed in the lower surface side of the storage tank 2, and it is preferable to be formed in the lower surface side edge part. In this way, ADU particles can be discharged without leaving them in the storage tank 2.

  The storage tank 2 preferably satisfies the shape restriction. The vertical dimension of the storage tank 2 is, for example, 8.3 cm or less for uranium having a concentration of 10% or less, and 6.7 cm or less for uranium having a concentration of 20% or less. In this way, it is possible to safely mass-produce ammonium heavy uranate particles without becoming a critical state.

  It is preferable that a plate-like member 4 including a neutron absorbing material is provided on the upper and lower outer peripheral surfaces of the storage tank 2 so as to sandwich the storage tank 2. Here, the substance constituting the neutron absorber may be any substance containing boron, cadmium, xenon, gadolinium, hafnium, or the like.

  In addition, the position where the plate-like member 4 is provided is not limited to the upper and lower outer peripheral surfaces of the storage tank 2 and, as will be described later, if the neutron that causes the critical state is absorbed, for example, the storage tank 2 may be provided on the side wall side.

  In this way, the plate-like member 4 including the neutron absorbing material is provided so as to sandwich the storage tank 2 so as to absorb neutrons that cause a critical state. The dimension limit value in the “shape limit” can be increased. Therefore, since the dimension of the storage tank 2 itself can be formed large, the production amount of ammonium heavy uranate particles can be increased.

  The swinging means 3 swings the storage tank 2. Specifically, the swinging means 3 is provided at the center of the storage tank 2 in the vertical and horizontal directions, and the support shaft 3A extending in the horizontal direction, and the rotating power means for rotating the support shaft 3A (not shown). It is equipped with. As this rotation power means, a motor etc. can be mentioned, for example. In this embodiment, the peristaltic means 3 moves the end of the storage tank 2 up and down in the vertical direction around the support shaft 3A. Moreover, the angle at the time of rotating the support shaft 3A can be appropriately set according to the horizontal dimension of the storage tank 2 and the amount of ammonium biuranate particles to be generated.

  The usage method and operation of the ADU particle production apparatus 1 will be described below. The uranyl nitrate-containing stock solution used when producing ADU particles 1 with the ADU particle production apparatus of the present invention is obtained by adding a water-soluble polymer to uranyl nitrate obtained by mixing uranium oxide and nitric acid, and then adding pure water. Is added to adjust the viscosity.

  Examples of the uranium oxide include uranium dioxide, uranium trioxide, and triuranium octoxide, and uranium trioxide is particularly preferable.

  Examples of the water-soluble polymer include synthetic polymers such as polyvinyl alcohol, sodium polyacrylate, and polyethylene oxide, cellulose polymers such as carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, and ethyl cellulose, starch-based polymers such as soluble starch, and carboxymethyl starch. And water-soluble natural polymers such as dextrin and galactan.

  One of these various water-soluble polymers may be used alone, or two or more thereof may be used in combination. Among these, the synthetic polymer is preferable as the water-soluble polymer, and polyvinyl alcohol is particularly preferable.

  First, a predetermined concentration and a predetermined amount of aqueous ammonia solution are stored in the storage tank 2. Next, a predetermined uranyl nitrate-containing stock solution is circulated through a dropping device (not shown), and a droplet of the uranyl nitrate-containing stock solution is dropped into the storage tank 2 from the dropping device (not shown) via the input unit 2A.

  Although illustration is omitted, ammonia gas may be appropriately sprayed on each dropped liquid droplet. In this way, gelation proceeds on the surface of the droplet, and deformation of the droplet when colliding with the ammonia aqueous solution surface can be suppressed.

  Thereafter, each droplet settles in the aqueous ammonia solution in the storage tank 2, and further absorbs ammonia from the aqueous ammonia solution. Each droplet is gelled not only on the surface but also on the inside, and the reaction proceeds to ADU particles.

  At this time, the storage tank 2 is rocked by the rocking means 3. The ADU particles inside the peristaltic storage tank 2 rolls in the storage tank 2 without staying in one place. While the ADU particles are rolling, droplets of the uranyl nitrate-containing stock solution are dropped one after another, and ADU particles are generated inside the storage tank 2. Since the generated ADU particles rarely collide with the previous ADU particles, deformation of the ADU particles can be minimized. In addition, since the generated ADU particles can continue to be deposited on the previous ADU particles or less, the ADU particles can be prevented from being deformed. Therefore, it is possible to produce ammonium heavy uranate particles having good sphericity.

  After the generation of the predetermined amount of ADU particles is completed, the ADU particles are discharged to the outside of the storage tank 2 through the discharge unit 2B. The ADU particles discharged to the outside are washed and dried, and then are subjected to roasting, reduction, and sintering under predetermined conditions to become uranium dioxide particles.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications and improvements within the scope that can achieve the object of the present invention are included in the present invention. For example, as a modification of the ADU particle manufacturing apparatus, an ADU particle manufacturing apparatus 11 as shown below can be cited. As shown in FIG. 2, the ADU particle manufacturing apparatus 11 includes a dropping device (not shown), a storage tank 12, and a peristaltic means 13.

  Although there is no restriction | limiting in particular as arrangement | positioning of the dripping apparatus which is not shown in figure as long as it can be dripped at the storage tank 12, For example, it is preferable to arrange | position on the central axis X2 of the storage tank 12 parallel to a perpendicular direction. In this way, the ADU particles formed by the dripped uranyl nitrate-containing stock solution are less likely to collide with the storage tank 12, and deformation of the ADU particles can be reduced.

  The storage tank 12 is provided below a dropping device (not shown) and stores an aqueous ammonia solution that reacts with the dropped uranyl nitrate-containing stock solution. The storage tank 12 has, for example, a flat plate shape as a whole.

  In addition, it is preferable that the storage tank 12 has the injection | throwing-in part 12A opened only in the upper surface part corresponding to the location where a dripping apparatus is arrange | positioned, and is formed in the airtight shape. If it does in this way, the fluctuation | variation of the density | concentration by vaporizing the ammonia aqueous solution to store can be suppressed.

  Furthermore, the storage tank 12 has a discharge part 12B for discharging ADU particles. The discharge part 12B should just be formed in the lower surface side of the storage tank 12, and it is preferable to be formed in the lower surface side edge part. In this way, ADU particles can be discharged without leaving them in the storage tank 12.

  The storage tank 12 has a plurality of partition plates 15. The plurality of partition plates 15 are arranged at predetermined intervals in the vertical direction. The storage tank 12 has a space 16 adjacent to each other partitioned by the storage tank 12 and the plurality of partition plates 15. Each of the plurality of partition plates 15 has a communication portion 17 that allows adjacent spaces 16 to communicate with each other.

  The communication portion 17 is formed in each partition plate 15 such that the flow direction of the fluid flowing through the space 16 formed by the adjacent partition plates 15 is opposite to the flow direction of the fluid in the adjacent spaces 16. It becomes.

  Specifically, the communication portion 17 is formed at a position opposite to the communication portion 17 of the adjacent partition plate 15 with respect to the central axis X2 of the storage tank 12 parallel to the vertical direction. In other words, the communication portions 17 are formed at alternate positions with respect to the central axis X2. In the present embodiment, the communication portion 17 is a through hole formed in the end portion of the partition plate 15.

  Here, the size and number of the partition plates 15 and the size and number of the partitioned spaces 16 are appropriately set according to the ammonium heavy uranate particles to be generated. In addition, it is preferable that the said partition plate 15 contains the neutron absorber. Examples of the neutron absorber include the same materials as described above.

  In this way, the entry of neutrons or the like that cause a critical state into the storage tank 12 is prevented, so that, for example, the dimension limit value in the so-called “shape limit” can be increased. Therefore, since the dimension of the storage tank 12 itself can be formed large, the production amount of heavy ammonium uranate particles can be increased.

  It is preferable that a plate-like member 14 containing a neutron absorbing material is provided on the upper and lower outer peripheral surfaces of the storage tank 12 so as to sandwich the storage tank 12, respectively. Here, the substance constituting the neutron absorber may be any substance containing boron, cadmium, xenon, gadolinium, hafnium, or the like.

  In addition, the position where the plate-shaped member 14 is provided is not limited to the upper and lower outer peripheral surfaces of the storage tank 12, and as will be described later, for example, if the neutron that causes a critical state is absorbed, the storage tank 12 side walls may be provided.

  In this case, since the plate-like member 14 including the neutron absorbing material is provided so as to sandwich the storage tank 12, it absorbs neutrons that cause a critical state. The dimension limit value in the “shape limit” can be increased. Therefore, since the dimension of the storage tank 12 itself can be formed large, the production amount of heavy ammonium uranate particles can be increased.

  The rocking means 13 rocks the storage tank 12. Specifically, the peristaltic means 13 is a central portion in the horizontal direction of the storage tank 12 and is provided in the storage tank 12, and rotates to rotate a support shaft 13A extending in the horizontal direction and a support shaft 13A (not shown). Power means. As this rotation power means, a motor etc. can be mentioned, for example. In this embodiment, the peristaltic means 13 moves the end of the storage tank 12 up and down in the vertical direction around the support shaft 13A. Further, the angle at which the support shaft 13A is rotated can be appropriately set according to the horizontal dimension of the storage tank 12 and the amount of ammonium biuranate particles to be generated.

  The usage method and operation of the ADU particle production apparatus 11 will be described below. In addition, the uranyl nitrate containing stock solution used when manufacturing ADU particle | grains with the ADU particle | grain manufacturing apparatus 11 of this invention is prepared by the raw material and conditions similar to the above.

  First, a predetermined concentration and a predetermined amount of aqueous ammonia solution are stored in the storage tank 12. Next, a predetermined uranyl nitrate-containing stock solution is circulated through a dropping device (not shown), and a droplet of the uranyl nitrate-containing stock solution is dropped into the storage tank 12 from the dropping device (not shown) via the input unit 12A.

  Thereafter, each droplet settles in the aqueous ammonia solution in the uppermost space 16 in FIG. 2 in the storage tank 12, and further absorbs ammonia from this aqueous ammonia solution. Each droplet is gelled not only on the surface but also on the inside, and the reaction proceeds to ADU particles.

  At this time, the storage tank 12 is rocked by the rocking means 13. The ADU particles inside the reserving tank 2 roll without rolling in the uppermost space 16 in FIG. The rolled ADU particles reach the next stage space 16 via the communication part 17 on the left side of the figure.

  The ADU particles that have reached the next-stage space 16 continue to roll within the next-stage space 16 in FIG. The rolled ADU particles pass through the communication portion 17 on the right side of the drawing and further reach the next space 16. Accordingly, while the ADU particles are rolling, droplets of the uranyl nitrate-containing stock solution are dropped one after another, and ADU particles are generated inside the storage tank 12. Since the generated ADU particles rarely collide with the previous ADU particles, deformation of the ADU particles can be minimized. Further, the generated ADU particles can be kept from being deposited on the previous ADU particles, and the ADU particles can be prevented from being deformed. Therefore, it is possible to produce ammonium heavy uranate particles having good sphericity.

  On the other hand, the ADU particles repeatedly move from the space 16 to the adjacent space 16 via the communication portions 17 and reach the lowermost space 16. After the generation of the predetermined amount of ADU particles is completed, the ADU particles are discharged to the outside of the storage tank 12 through the discharge unit 12B. The ADU particles discharged to the outside are washed and dried, and then are subjected to roasting, reduction, and sintering under predetermined conditions to become uranium dioxide particles.

  As described above, the swinging means 3 and 13 swing the storage tanks 2 and 12 in the vertical direction, respectively. However, the swinging means swings the storage tank in the horizontal direction. You may make it rock | fluctuate and you may rock | fluctuate to both a perpendicular direction and a horizontal direction. As an example in which the peristaltic means swings the storage tank in the horizontal direction, a modification shown in FIG. 3 is given. As shown in FIG. 3, the ADU particle manufacturing apparatus 21 includes a dropping device (not shown), a storage tank 22, and a peristaltic means (not shown). The storage tank 22 has a charging portion 22A that is open at the center of the upper surface. The procedure for producing ammonium heavy uranate particles using the ADU particle production apparatus 21 is as follows. First, a droplet of uranyl nitrate-containing stock solution is dropped into the storage tank 22 from the charging portion 22A. Then, the storage tank 22 is swung in the horizontal direction by a swinging means (not shown).

  The perturbing ADU particles inside the storage tank 22 roll within the storage tank 22 without staying in one place. While the ADU particles are rolling, droplets of the uranyl nitrate-containing stock solution are dropped one after another, and ADU particles are generated inside the storage tank 22. Since the generated ADU particles rarely collide with the previous ADU particles, deformation of the ADU particles can be minimized. In addition, the generated ADU particles can be less likely to continue to accumulate on the previous ADU particles. Therefore, it is possible to produce ammonium heavy uranate particles having good sphericity.

FIG. 1 is a schematic view showing a vertical cross section of an apparatus for producing ammonium heavy uranate particles according to the present invention. FIG. 2 is a schematic view showing a vertical cross section of a modification of the ammonium biuranium particle production apparatus according to the present invention. FIG. 3 is a schematic view showing a modification of the ammonium biuranium particle production apparatus according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ADU particle manufacturing apparatus 2 Storage tank 2A Input part 2B Discharge part 3 Swing means 3A Support shaft 4 Plate member 11 ADU particle manufacturing apparatus 12 Storage tank 12A Input part 12B Discharge part 13 Swing means 13A Support shaft 14 Plate-shaped member 15 Partition Plate 16 Space 17 Communication part 21 ADU particle production apparatus 22 Storage tank 22A Input part X1 central axis X2 central axis

Claims (6)

  An apparatus for producing ammonium heavy uranate particles, comprising: a storage tank for storing an aqueous ammonia solution; and a peristalizing means for swinging the storage tank. The storage tank has a plurality of partition plates arranged at predetermined intervals in the vertical direction,
The plurality of partition plates each have a communication portion that communicates adjacent spaces partitioned by the storage tank and the plurality of partition plates,
The said communicating part is formed in each partition plate so that the flow direction of the fluid which flows through the space formed by the adjacent partition plate may be opposite to the flow direction of the fluid in the adjacent space. 2. The apparatus for producing ammonium heavy uranate particles according to 1.   The said communication part is formed in the position opposite to the center axis line of the said storage tank parallel to a perpendicular direction with the communication part of an adjacent partition plate, The ammonium heavy uranate particle manufacture of Claim 2 characterized by the above-mentioned. apparatus.   The said storage tank is an ammonium heavy uranate particle manufacturing apparatus of any one of the said Claims 1-3 which satisfy | fills shape restrictions.   The said partition plate is an ammonium heavy uranate particle manufacturing apparatus of any one of the said Claims 2-4 containing the neutron absorber.   The heavy uranic acid according to any one of claims 1 to 5, wherein a plate-like member including a neutron absorbing material is provided on an outer peripheral surface of the storage tank so as to sandwich the storage tank. Ammonium particle production equipment.

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