93results about "Conversion in nuclear reactor" patented technology

Main characteristic of the invention is the exploitation of the very large flux of high energy neutrons generated in a nuclear fusion tokamak with beam-driven plasma for the purpose of producing radioisotopes. It specifically relates to the deployment of precursor materials into the core of a nuclear fusion tokamak with beam-driven plasma for the purpose of exposing these materials to the neutron flux generated in the plasma by the process of nuclear fusion of Deuterium (D) and Tritium (T) to generate radioactive isotopes, so-called radioisotopes. The precursor materials contained in metallic capsules are incorporated into the blankets that surround the plasma.

A radioisotope production capsule is described. Each capsule includes generally an inner container for housing one of a target material and a neutron moderator, an outer container surrounding the inner container for housing the one of the target material and the neutron moderator not housed by the inner container, and cladding for isolating the target material from the neutron moderator. One or more modular capsules are placed in each of a plurality of plug fingers. Each single plug finger loaded with one or more capsules is inserted into a guide thimble of an array of guide thimbles in a fuel assembly.

The invention provides a single / double-module energy-adjustable superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises single or double parallel acceleration modules, and each acceleration module comprises a superconducting cavity and a low-temperature unit; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the radio frequency system is used for feeding microwave power into the superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electron motion trail control system is used for guiding the electron beam to pass through the acceleration module and the plurality of circulating transmission pipelines with the corner radiuses sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

Techniques are described for producing actinium-225 by arranging a converter material at least partially around a target material, where the target material includes radium-226. The converter material comprises a compound of lithium and hydrogen at least partially enriched with lithium-6 and deuterium, and is configured to convert thermal neutrons to fast neutrons, which are then incident on the radium-226. If the fast neutrons have a kinetic energy of at least 6.4 MeV, they will initiate a (n,2n) reaction that converts radium-226 into radium-225, which then decays into actinium-225. The process can desirably be performed within an environment rich in thermal neutrons, such as within a fission reactor.

The invention provides a single-module double-cavity parallel superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises a low-temperature unit and a superconducting cavity; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the refrigerating machine is connected with the superconducting cavity through a high-thermal-conductivity cold chain; the radio frequency system is used for feeding microwave power into each superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electronic motion trail control system is used for guiding the electronic beam current to pass through the double parallel superconducting cavities and a plurality of circulating transmission pipelines of which the corner radiuses are sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

The invention relates to the design, configuration and operation concept of a system, herein called radioisotope recovery system, to deploy and recover different precursor materials into and from the core of a nuclear fusion tokamak with beam-driven plasma for the purpose of exposing these materials to the neutron flux generated in the plasma by the process of nuclear fusion of D and T ions, which will cause the generation of radioactive isotopes (also called radioisotopes). Main characteristics of the invention are (i) a closed loop that circulates precursor materials into and out of a nuclear fusion tokamak with beam-driven plasma, (ii) the compliance of the system with the design and maintenance of a nuclear fusion tokamak with beam-driven plasma.

The embodiment of the invention discloses a method and a device for preparing 212Pb based on 226Ra, and the method comprises the following steps: carrying out reactor irradiation treatment on a target material containing 226Ra to obtain an irradiated target material; and dissolving the irradiation target material to obtain a target material dissolving solution. The target material dissolving solution is placed in a first separation column to be subjected to first acid leaching treatment, a Th-containing adsorption column is obtained, and the first separation column is used for adsorbing Th. And carrying out second acid leaching treatment on the Th-containing adsorption column to obtain a Th-containing eluent. And carrying out standing treatment on the Th-containing eluent to obtain a standing solution containing 228Th. And the standing liquid containing 228Th is placed in a second separation column to be subjected to third acid leaching treatment, eluant containing 212Pb is obtained, and the second separation column is used for separating lead.

This invention provides a target loading device for producing short-half-life isotopes in a heavy water reactor, comprising a channel, an electric cylinder, and a target drum assembly. One end of the channel leads to the reactor core. The target drum assembly sequentially pushes the loaded targets to the target outlet. The main shaft of the electric cylinder is coaxially arranged with the target outlet, driving the main shaft to move towards the target outlet to push the target at the outlet into the channel. The target enters the reactor core through the channel. This invention enables the loading of short-half-life radioactive isotope targets for several days or tens of days during heavy water reactor power operation, facilitating installation and maintenance. Different types and quantities of isotope targets can be loaded into the core production channel during heavy water reactor power operation.

This invention discloses a method for producing radioactive isotopes in the core of an advanced high-temperature reactor using a spherical target. This invention overcomes the limitations of using neutron irradiation channels or fuel-related components of nuclear reactors, such as conditioning rods in heavy water reactors and combustible poison rods in pressurized water reactors, to produce radioactive isotopes. It sets a precedent for the mass production of radioactive isotopes using the core of a nuclear reactor, and has significant strategic implications for exploring high-value applications of commercial advanced high-temperature reactors to reduce operating costs and mass-produce radioactive isotopes, including the strategic isotope tritium.

An irradiation target for the production of radioisotopes comprises a plurality of plates having aligned central openings. First and second elongated central members extend in opposite directions through the aligned central openings of the plates. The first and second elongated central members each have a pair of wings at first and second ends of the plurality of plates, respectively. The first and second elongated central members further have a pair of tabs adjacent to the wings of the other elongated central member. Tabs of the first elongated central member are bent to engage one end face of the plurality of plates. Tabs of the second elongated central member are folded over the wings of the first elongated central member. The plates and the first and second elongated central members are formed of materials that produce molybdenum-99 (Mo-99) by way of neutron capture.

The present disclosure provides various methods, systems, and devices for producing actinium-225 (Ac-225). In one aspect of the disclosure, a method for producing Ac-225 includes inserting an irradiation target assembly into a commercial nuclear reactor. The irradiation target assembly comprises a radium-226 (Ra-226) material. The method further includes producing electricity using the commercial nuclear reactor by generating a neutron flux in the commercial nuclear reactor. The method further includes irradiating the Ra-226 material with the neutron flux generated in the in the commercial nuclear reactor to produce a radium-225 (Ra-225) material. The Ra-225 material decays to produce an Ac-225 material.

An irradiation target for the production of radioisotopes, having at least one plate defining a central opening, and a first elongated central member passing through the central opening of the at least one plate so that the at least one plate is retained thereon, wherein the at least one plate and the first elongated central member are both formed of materials that produce molybdenum-99 (Mo-99) by way of neutron capture.

The invention discloses a method for producing radioactive isotopes in a reactor core of an advanced high-temperature reactor by adopting a spherical target piece. According to the invention, the limitation that the radioactive isotope can only be produced by using a neutron irradiation channel of a nuclear reactor or fuel-related components such as an adjusting rod of a heavy water reactor and a burnable poison rod of a pressurized water reactor is broken through, and a precedent of mass production of the radioactive isotope by using the reactor core of the nuclear reactor is created; the method has important strategic significance for exploring high-value application scenes of commercial advanced high-temperature reactors to reduce operation cost and producing radioactive isotopes including strategic isotope tritium in batches.

An irradiation target is formed into a sphere. The spherical irradiation target can be iridium metal (10) containing natural or enriched iridium 191. The radiation source of the present invention can be manufactured by manufacturing a spherical irradiation target, accommodating the spherical irradiation target in a rotating capsule (20), and rotating an axial flow impeller (32) by a downward flow of a reactor primary coolant, whereby the rotating capsule (20) is rotated. This radiation source provides an improved nondestructive inspection image having a high geometric resolution, and has no radiation source anisotropy and also has high target recyclability.

Reactor target assemblies are provided that can include a housing defining a perimeter of at least one volume and Np or Am spheres within the one volume. Reactor assemblies are provided that can include a reactor vessel and a bundle of target assemblies within the reactor vessel, at least one of the target assemblies comprising a housing defining a volume with Np or Am spheres being within the volume. Irradiation methods are also provided that can include irradiating Np or Am spheres within a nuclear reactor, then removing the irradiated spheres from the reactor and treating the irradiated spheres.

Various embodiments include a method of producing purified lutetium-177. The method may include irradiating a target material containing lutetium-176 in a nuclear reactor, separating lutetium-177 from the irradiated target material using electromagnetic isotope separation, dissolving the separated lutetium-177 in an acidic solution, purifying the dissolved lutetium-177 using a series of chromatographic columns and ion resins, and eluting the purified lutetium-177 in a final chemical form suitable for medical use. The chromatographic columns may include a first column containing a lanthanide resin and a second column containing a diglycolamide resin. The final chemical form may be lutetium-177 chloride.

The invention discloses an isotope production method of a pneumatic conveying type coating target material ball. The method comprises the following steps: putting a coating target ball into an absorption ball pore channel of a reflecting layer of a pebble-bed high-temperature gas cooled reactor for irradiation; after irradiation is completed, the coating target balls are conveyed back to the ball storage tank through a pneumatic conveying system; transferring the coated target balls after irradiation in the ball storage tank to a post-treatment hot chamber; and in a post-treatment hot chamber, dissolving and separating the coating of the coating target ball containing the target isotope to obtain a dissolving solution, and purifying the dissolving solution to obtain an isotope solution. Based on an existing secondary shut-down system engineering design scheme and a remote control technology, full-sealing and remote automatic operation of a target ball are achieved for isotope production, the risk that personnel make contact with radioactivity is reduced to the maximum extent, and normal power generation operation of the pebble-bed high-temperature gas cooled reactor is not affected.

The inventors have developed technology to improve the generation of daughter isotopes for clinical treatments. The technology includes systems and methods for using a liquid target to deliver parent isotopes to a reactor for neutron bombardment and subsequently separating desired daughter isotopes from the liquid target. According to an aspect of the technology described herein, a method of obtaining desired daughter isotopes comprises pumping a liquid target solution comprising a parent isotope through a fluid path that includes a first portion that passes through a fission reactor, a second portion that passes through a pump, and a third portion that passes through an isotope capture device.

The application provides a design method of a medical isotope reactor fuel solution, which comprises: the fuel solution comprises uranyl nitrate and nitric acid; the concentration of F ‑ ≤1mg / L, Cl ‑ ≤1mg / L, total boron equivalent ≤4.0μg / gU, Ru ion ≤0.02g / L, Cr ion ≤0.05g / L, Al ion ≤11.12g / L, and other impurities meet the requirements of GB / T 10266 standard; the concentration of acid, the concentration of uranium and the temperature of the fuel solution are controlled to control the pH value of the fuel solution; the operation power density of the fuel solution is not greater than 2.0kW / L, and a catalyst is used to prevent the fuel solution from generating precipitates during operation. The design method of the medical isotope reactor fuel solution provided by the application can realize long-term stable operation of the fuel solution, and is safe and economical.

An apparatus for translating and stopping an irradiation capsule assembly in an instrumentation tube is provided. The apparatus comprises a body adapted to be to slidably received within an inner diameter defined by an instrumentation tube. The body defines a cavity having an inner wall defining a diameter and a plurality of radially distributed apertures. At least one of the plurality of radially distributed apertures defines an edge. The body further comprises a proximal end defining an opening. The apparatus further comprises a radial spring slidably disposed within the cavity defined by the body. The radial spring comprises an endplate and a plurality of spring arms extending from the endplate and biased radially outwardly. Each one of the plurality of spring arms comprises a detent. A system for translating and stopping an irradiation capsule assembly in an instrumentation tube is also provided.

The invention provides a high-temperature reactor with an isotope production pore channel and a target loading and unloading method, the high-temperature reactor with the isotope production pore channel comprises a pressure container, a top plate, a bottom shielding layer, a conveying pipe, a loading and unloading device and a storage container, the pressure container is internally provided with a target channel, and the target channel penetrates through the top and the bottom of the pressure container in the vertical direction; the metal reactor internals, the carbon reactor internals and the graphite reactor internals penetrate through the pressure vessel; the top plate is arranged above the pressure container, and the bottom shielding layer is arranged at the bottom of the pressure container; the conveying pipe is inserted into the target channel and is used for conveying the target; the loading and unloading device is arranged at the upper end of the top plate, the storage container is arranged below the bottom shielding layer, and the lower end of the conveying pipe extends into the storage container. According to the invention, the target piece can stably stay in the reactor for irradiation, so that the target piece in the conveying pipe obtains enough neutron flux, and the device is convenient to assemble and disassemble.

The present disclosure relates to methods and apparatuses for producing radioisotopes in a nuclear reactor. The methods and apparatuses employ a target mixture or a target assembly that includes two or more neutron targets and a gamma radiation target. The neutron targets interact with high thermal neutron flux to produce prompt gamma radiation, which irradiates the gamma radiation target to form a radioisotope of interest. The methods and apparatuses of the present disclosure offer avenues to improve the production of critical radioisotopes including but not limited to Ac-225 and Tc-99m.

An enclosure for producing radioisotopes from material to be irradiated within a thimble guide tube of a nuclear reactor core is provided. The enclosure is constructed of enriched material and defines a cavity therein. The cavity of the enclosure is configured to contain the material to be irradiated. A target assembly for producing synthetic radioisotopes and a method for producing pharmaceutical radioisotopes using the target assembly are also provided.

Apparatus for irradiating a target, and method of operating thereof comprises a nuclear fusion reactor and a target holder wherein the target holder is configured to hold a liquid target. in a preferr

A multi-use incore system for use with a nuclear reactor having a reactor core including an instrumentation tube is disclosed. The multi-use incore system comprises a drive cable, a neutron detector, an electromagnetic tool, and an irradiation target. The drive cable comprises an adapter at its distal end. The drive cable is slidably receivable into the instrumentation tube. The neutron detector is removably attachable to the adapter of the drive cable to monitor core power distribution. The neutron detector is slidably receivable into the instrumentation tube by the drive cable. The electromagnetic tool is removably attachable to the adapter of the drive cable in lieu of the neutron detector. The irradiation target is to produce a radioisotope. The drive cable is selectively attachable to the irradiation target by the electromagnetic tool to insert the irradiation target into the instrumentation tube and remove the irradiation target from the instrumentation tube.

The embodiment of the invention discloses an irradiation test device. The irradiation test device comprises a cladding pipe fitting, a pressure pipe fitting, a shunting pipe fitting and a driving assembly, wherein a cladding cavity with an opening in one end is formed in the cladding pipe fitting, and the cladding pipe fitting is used for making contact with a reactor coolant. And the pressure pipe fitting is arranged in the cladding cavity. The flow dividing pipe fitting is arranged in the pressure cavity, an outer flow channel is arranged between the flow dividing pipe fitting and the pressure pipe fitting, and the outer flow channel and the inner flow channel are communicated to form a heat exchange flow channel. A test object is arranged at one end of the shunting pipe fitting. And the driving assembly is arranged in the heat exchange runner. The driving assembly is arranged in the irradiation test device, the heat exchange medium circularly flows in the inner flow channel and the outer flow channel, when the heat exchange medium flows through the test object, the temperature rises, and when the heat exchange medium flows through the outer flow channel, the heat exchange medium exchanges heat with the coolant of the reactor to reduce the temperature. Therefore, a closed cycle test loop in the reactor is formed, an out-of-reactor part does not need to be arranged, and the whole system structure can be simplified.

The invention belongs to the technical field of reactor irradiation radioactive isotope production, and aims to solve the problems that isotopes are greatly attenuated and isotope targets cannot enter and exit a reactor core at any time during power operation due to the fact that short-half-life isotopes produced by reactor core irradiation can only be taken out during reloading work. The invention provides a device and method for online production of short-half-life isotopes by using a sodium-cooled fast reactor, the device is characterized in that a blind pipe capable of moving up and down is arranged on a cock, the bottom of the blind pipe penetrates through a reactor core active area, the top of the blind pipe is connected with a lifting device, and the upper part of the blind pipe is connected with a rabbit device; the irradiation capsule target piece is blown in and out of the reactor core active area in a pneumatic mode; according to the method, the irradiation capsule target piece is blown into a reactor core active area for irradiation by using the device, and the irradiation capsule target piece is blown out after irradiation is finished. According to the invention, online production of the short-half-life isotope by the pool type sodium-cooled fast reactor can be realized, and a new scheme is provided for online production of the short-half-life isotope by the sodium-cooled fast reactor.

The application discloses a kind of heavy water reactor production 99 The target nucleus of Mo includes target tube, target material layer and neutron absorber material, the target material layer is sleeved on the target tube, and the both ends of the target tube are respectively connected with inner end plug, and the neutron absorber material is arranged in the target tube. 99 The target nucleus production element of Mo includes target nucleus, cladding tube, isolation block, support block and outer end plug, the target nucleus is arranged in the circular tube-shaped cladding tube, the both ends of the cladding tube are welded with outer end plug to seal it, and the outer part of the cladding tube is respectively welded with isolation block and / or support block. The production assembly includes production element and end plate, and the end plate is welded and connected with the both ends of the production element. The beneficial effects of the application are that the effect of the application is to produce carrier-free 99 Mo while producing electricity by heavy water reactor, which meets the demand of nuclear medicine field for 99 Mo.

A vial for an irradiation target. The vial comprises a body including a cylindrical wall extending along a longitudinal axis, a bottom wall portion at a first end of the body, and an opening at a second end of the body that is opposite the first end. The vial further comprises a cap coupled to the body at the second end, the cap includes an exterior frangible portion and an interior frangible portion.