CN115910414A - Heavy water reactor production 99 Target nuclei of Mo, production element and production component - Google Patents
Heavy water reactor production 99 Target nuclei of Mo, production element and production component Download PDFInfo
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- CN115910414A CN115910414A CN202210301304.6A CN202210301304A CN115910414A CN 115910414 A CN115910414 A CN 115910414A CN 202210301304 A CN202210301304 A CN 202210301304A CN 115910414 A CN115910414 A CN 115910414A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses heavy water reactor production 99 The target core of Mo comprises a target pipe, a target material layer and a neutron absorber material, wherein the target material layer is sleeved outside the target pipe, two ends of the target pipe are respectively connected with an inner end plug, and the neutron absorber material is arranged in the target pipe. Heavy water reactor production 99 The Mo target nucleic acid production element comprises a target nucleic acid, a cladding tube, an isolation block, a supporting block and an outer end plug, wherein the target nucleic acid is arranged in the circular-tube-shaped cladding tube, the outer end plugs are welded at two ends of the cladding tube to seal the cladding tube, and the isolation block and/or the supporting block are respectively welded outside the cladding tube. The production assembly comprises a production element and end plates, wherein the end plates are connected with two ends of the production element in a welding mode. The invention has the beneficial effects that: the invention has the effect of producing the carrier-free material while producing the power generation by using the heavy water reactor 99 Mo, satisfies the nuclear medicine field 99 Mo is required.
Description
Technical Field
The invention belongs to the field of nuclear technology application, and particularly relates to heavy water reactor production 99 Target nuclei of Mo, production elements and production components.
Background
99 Mo is the most important medical radioisotopeVegetable oil 99m Parent nuclides of Tc. 99m Short Tc half-life (6.02 h), proper ray energy (140 keV), suitability for single photon emission tomography (SPECT), and labeling of various ligand drugs for annual use 99m Tc-labeled drugs are used for nuclear medicine imaging diagnosis for about 4000 million people, and account for about 70 percent of all clinically used radiopharmaceuticals.
99 Mo is produced mainly by reactor irradiation, by accelerators and by neutron generators. Irradiation production on reactor 99 Mo with neutron capture 98 Mo(n,γ) 99 Mo and fission 235 U(n,f) 99 Mo and Mo in two ways. The former contains a large amount of 98 Isotope of Mo, hence called carrier 99 Mo, the latter containing a very small amount of Mo isotopes, is called unsupported 99 And Mo. Currently worldwide 99 Mo is mainly a carrier-free research for reactor production by fission 99 Mo, has been developed and utilized in heavy water heap for producing carriers internationally 99 Mo, until now, no carrier is produced by utilizing commercial heavy water reactor 99 Examples of Mo.
Disclosure of Invention
The invention aims to provide heavy water reactor production 99 Target nucleus of Mo, production element and production assembly, produced 99 Mo is mainly applied to the field of nuclear medicine diagnosis.
The technical scheme of the invention is as follows: heavy water reactor production 99 The Mo target nucleic acid comprises a target tube, a target material layer and a neutron absorber material, wherein the target material layer is sleeved outside the target tube, two ends of the target tube are respectively connected with an inner end plug, and the neutron absorber material is arranged in the target tube.
The neutron absorber material is a depleted uranium pellet.
The depleted uranium pellets are arranged in the target pipe.
The neutron absorber is a zirconium rod, and a dysprosium coating is coated outside the zirconium rod.
The zirconium rod is arranged in the target tube.
Heavy water reactor production 99 The Mo target nucleic acid producing element comprisingThe target nucleic acid detecting device comprises a target nucleic acid, a cladding tube, isolating blocks, supporting blocks and outer end plugs, wherein the target nucleic acid is arranged in the circular-tube-shaped cladding tube, the outer end plugs are welded at two ends of the cladding tube to seal the cladding tube, and the isolating blocks and/or the supporting blocks are welded outside the cladding tube respectively.
The cladding tube, the isolating block, the supporting block and the outer end plug are all made of Zr-4 alloy.
The inner wall of the cladding tube is coated with graphite, and helium is filled in an air gap between the cladding tube and the target core.
Heavy water reactor production 99 The target nucleic acid production assembly of Mo includes a production element and end plates welded to both ends of the production element.
The end plate material is Zr-4 alloy.
The invention has the beneficial effects that: the invention has the effect of producing the carrier-free body while producing the power generation by utilizing the heavy water reactor 99 Mo, satisfies the nuclear medicine field 99 Mo is required.
Drawings
FIG. 1 shows the production of a heavy water reactor according to the present invention 99 A schematic of the target nucleic acid producing element for Mo;
FIG. 2 shows the production of a heavy water heap in accordance with the present invention 99 A schematic diagram of Mo target nucleic acid production with depleted uranium as a neutron absorber;
FIG. 3 shows the production of a heavy water pile according to the present invention 99 A schematic diagram of production target nucleic acid of Mo taking dysprosium as a neutron absorber;
FIG. 4 shows the production of a heavy water heap provided by the present invention 99 A schematic of the target nucleic acid production component for Mo;
fig. 5 is a cross-sectional view of fig. 3.
In the figure, 100 production assemblies, 1 production element, 2 end plates, 11 target nuclei, 12 cladding tubes, 13 outer end plugs, 14 support blocks, 15 spacer blocks, 111 target material layers, 112 target tubes, 113 depleted uranium pellets, 114 inner end plugs, 115 dysprosium coatings, 116 zirconium rods.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
To realizeThe invention provides a heavy water reactor production 99 Target nuclei of Mo placed in heavy water reactor to receive neutron irradiation for production 99 Mo, as shown in fig. 2 and 3, includes a target tube 112, a target material layer 111, and a neutron absorber material, where the neutron absorber material shown in fig. 2 is a depleted uranium pellet 113, the neutron absorber material shown in fig. 3 is a zirconium rod 116 coated with a dysprosium coating 115, the target tube 112 is a circular tubular structure, the target tube 112 is externally sleeved with the target material layer 111, two ends of the target tube 112 are respectively connected with an inner end plug 114, the target tube 112 and the inner end plugs 114 at the two ends form a closed space, and as shown in fig. 2, a plurality of depleted uranium pellets 113 as the neutron absorber material are arranged in the target tube 112; as shown in fig. 3, a zirconium rod 116 coated with a dysprosium coating 115 on its outer layer is disposed within the target tube 112.
Preferably, the target tube 112 is a Zr-4 alloy or stainless steel. The target material is electrodeposited or otherwise plated on the outer surface of the target tube, the target material being selected from 235 Low-concentration uranium with the U enrichment degree of 10-19.95%, and the thickness of the coating is 20-100 mu m.
The neutron absorber material can be depleted uranium or natural dysprosium (Dy).
Preferably, UO is used if the neutron absorber is depleted in uranium 2 The depleted uranium pellet is loaded in the target tube, and the two ends of the target tube are opened or sealed by welding by adopting inner end plugs. If the neutron absorber adopts natural dysprosium, the zirconium rod is designed to be arranged in the target tube, and the natural dysprosium is coated on the outer surface of the zirconium rod. Helium is filled in the target tube, and the two ends of the target tube are welded and sealed by adopting inner end plugs.
As shown in figure 1, the invention provides a heavy water reactor production 99 The Mo target nucleic acid production element 1 comprises a target nucleic acid 11, a cladding tube 12, an isolation block 15, a support block 14 and an outer end plug 13, wherein the target nucleic acid 11 is arranged in the circular tube-shaped cladding tube 12, and the outer end plugs 13 are welded at two ends of the cladding tube 12 for sealing. The outside of the cladding tube 12 is welded with a spacer block 14 and a support block 15, respectively. The cladding tube 12, the isolation block 15, the supporting block 14 and the outer end plug 13 are all made of Zr-4 alloy, the inner wall of the cladding tube 12 is coated with graphite, and helium is filled in an air gap between the cladding tube 12 and the target nucleic acid 11.
As shown in fig. 4, a heavy water reactor production 99 The Mo target nucleic acid production assembly comprises a production element 1 and an end plate 2. The production element 1 is positioned by means of the spacer block 15 and the end plate 2, the support block 14 avoiding the production element to contact the inner surface of the fuel channel. The end plates 2 are welded to both ends of the production element 1. The end plate 2 material is Zr-4 alloy. The enrichment degree of the depleted uranium or the loading amount of dysprosium is determined according to the equivalence condition of the production assembly and the natural uranium fuel assembly.
Claims (10)
1. Production of heavy water reactor 99 A target nucleus of Mo characterized by: the neutron absorber target tube comprises a target tube, a target material layer and a neutron absorber material, wherein the target material layer is sleeved outside the target tube, two ends of the target tube are respectively connected with an inner end plug, and the neutron absorber material is arranged in the target tube.
2. The heavy water reactor production of claim 1 99 A target nucleus of Mo characterized by: the neutron absorber material is a depleted uranium pellet.
3. A heavy water heap as claimed in claim 2 99 A target nucleus of Mo characterized by: the depleted uranium pellets are arranged in the target pipe.
4. A heavy water heap as claimed in claim 1 99 A target nucleus of Mo characterized by: the neutron absorber material is a zirconium rod, and a dysprosium coating is coated outside the zirconium rod.
5. The production of a heavy water heap as claimed in claim 4 99 A target nucleus of Mo characterized by: the zirconium rod is arranged in the target tube.
6. Production of heavy water reactor 99 A Mo target nucleic acid producing element characterized by: the target nucleic acid detecting device comprises a target nucleic acid, a cladding tube, an isolating block, a supporting block and/or an outer end plug, wherein the target nucleic acid is arranged in the circular tube-shaped cladding tube, the outer end plugs are welded at two ends of the cladding tube to seal the cladding tube, and the isolating block and/or the supporting block are respectively welded outside the cladding tube.
7. A heavy water heap production as claimed in claim 6 99 A Mo target nucleic acid producing element characterized by: the cladding tube, the isolating block, the supporting block and the outer end plug are all made of Zr-4 alloy.
8. A heavy water heap production as claimed in claim 6 99 A Mo target nucleic acid producing element characterized by: the inner wall of the cladding tube is coated with graphite, and helium is filled in an air gap between the cladding tube and the target core.
9. Heavy water reactor production 99 A target nucleic acid production component of Mo, characterized by: comprises a production element and end plates, wherein the end plates are welded with two ends of the production element.
10. A heavy water heap production as claimed in claim 7 99 A target nucleic acid production component of Mo, characterized by: the end plate material is Zr-4 alloy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021109641701 | 2021-08-21 | ||
| CN202110964170 | 2021-08-21 |
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| Publication Number | Publication Date |
|---|---|
| CN115910414A true CN115910414A (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220667415.4U Active CN217847449U (en) | 2021-08-21 | 2022-03-24 | Heavy water reactor production 99 Target nuclei of Mo, production element and production component |
| CN202210301304.6A Pending CN115910414A (en) | 2021-08-21 | 2022-03-24 | Heavy water reactor production 99 Target nuclei of Mo, production element and production component |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220667415.4U Active CN217847449U (en) | 2021-08-21 | 2022-03-24 | Heavy water reactor production 99 Target nuclei of Mo, production element and production component |
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- 2022-03-24 CN CN202220667415.4U patent/CN217847449U/en active Active
- 2022-03-24 CN CN202210301304.6A patent/CN115910414A/en active Pending
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| CN217847449U (en) | 2022-11-18 |
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