CN112216408A - Fuel element, high-temperature gas-cooled reactor and high-temperature gas-cooled reactor system - Google Patents
Fuel element, high-temperature gas-cooled reactor and high-temperature gas-cooled reactor system Download PDFInfo
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- CN112216408A CN112216408A CN202011227084.4A CN202011227084A CN112216408A CN 112216408 A CN112216408 A CN 112216408A CN 202011227084 A CN202011227084 A CN 202011227084A CN 112216408 A CN112216408 A CN 112216408A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/02—Fuel elements
- G21C3/04—Constructional details
- G21C3/06—Casings; Jackets
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/28—Selection of specific coolants ; Additions to the reactor coolants, e.g. against moderator corrosion
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/02—Fuel elements
- G21C3/04—Constructional details
- G21C3/06—Casings; Jackets
- G21C3/08—Casings; Jackets provided with external means to promote heat-transfer, e.g. fins, baffles
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/42—Selection of substances for use as reactor fuel
- G21C3/58—Solid reactor fuel Pellets made of fissile material
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a fuel element, a high-temperature gas-cooled reactor and a high-temperature gas-cooled reactor system, relates to the technical field of high-temperature gas-cooled reactors, and aims to solve the technical problem that dust pollution is easily caused when the conventional fuel ball is used for refueling without stopping the reactor. The fuel element of the invention comprises: a plurality of fuel cartridges containing fuel elements, the fuel cartridges having a regular tetrahedron structure, a regular quadrangular prism structure or a regular hexagonal prism structure, the fuel elements being coated with the granular fuel using TRISO; and, the lateral wall of fuel box is seted up a plurality of holes.
Description
Technical Field
The invention relates to the technical field of high-temperature gas cooled reactors, in particular to a fuel element, a high-temperature gas cooled reactor and a high-temperature gas cooled reactor system.
Background
The high-temperature gas cooled reactor adopts coated granular fuel and takes graphite as a moderator. The outlet temperature of the reactor core can reach 850-1000 ℃, even higher; the nuclear fuel generally adopts high-concentration uranium dioxide, and also adopts low-concentration uranium dioxide; the high-temperature gas-cooled reactor is a ball-separating bed high-temperature gas-cooled reactor and a prismatic high-temperature gas-cooled reactor according to the shape of a reactor core.
Specifically, in the prior art, once the fuel spheres are put into the core, the residence time and moving route of the fuel spheres in the core are completely out of control of people, and the void ratio between adjacent spheres is also completely uncontrollable randomly, so that the calorific value of the fuel spheres and the calorific value of helium derived from the fuel spheres in the area near a certain point in the core are both unpredictable and change along with time; in the pebble bed reactor, there may occur local regions of very high pebble temperature, so-called hot spots, which may lead to a serious contamination of the reactor primary circuit with metallic fission products mixed with graphite dust.
Therefore, it is a technical problem to be solved by those skilled in the art how to provide a fuel element, a high temperature gas cooled reactor, and a high temperature gas cooled reactor system, which can effectively avoid the dust pollution generated during the refueling without stopping the reactor.
Disclosure of Invention
The invention aims to provide a fuel element, a high-temperature gas-cooled reactor and a high-temperature gas-cooled reactor system, which aim to solve the technical problem that the conventional fuel ball is easy to generate dust pollution when the fuel is changed without stopping the reactor.
The present invention provides a fuel element comprising: a plurality of fuel cartridges containing fuel elements, said fuel cartridges employing regular tetrahedral, regular quadrangular prism, or regular hexagonal prism structures, said fuel elements employing tris-coated particulate fuel; the side wall of the fuel box is provided with a plurality of holes.
In the fuel element, the fuel box adopts a regular quadrilateral prism structure and comprises a plurality of fuel element boxes and/or control rod thimbles; the fuel element box adopts a cylindrical structure or a regular quadrilateral prism structure, and fuel balls loaded with TRISO fuel are loaded in the fuel element box.
Specifically, in the fuel element of the present invention, a plurality of holes are formed in a side wall of the fuel element cartridge.
Further, in the fuel element according to the present invention, graphite nodules are loaded in the fuel element case.
Or, graphite nodules are loaded in the fuel element box, and the graphite nodules contain neutron absorbing materials as burnable poisons.
In practical application, the fuel element of the present invention further includes a bundle rod fuel element loaded in the fuel cartridge, and the bundle rod fuel element includes: silicon carbide cladding, and a fuel rod with a core of TRISO coated particulate fuel.
In practical applications, the fuel element of the present invention further includes a sleeve assembly loaded in the fuel cartridge, wherein the sleeve assembly includes: a silicon carbide cladding, and a cylindrical fuel element having a core of TRISO coated particulate fuel.
In the fuel element according to the present invention, a graphite rod having a silicon carbide cladding is inserted into the center of the cylindrical fuel element.
Or a burnable poison rod cladded by silicon carbide is inserted in the center of the cylindrical fuel element, and the burnable poison rod comprises TRISO-coated particle fuel, the TRISO-coated particle fuel comprises an absorber material serving as burnable poison, and the absorber material can be a boron-containing material or a gadolinium-containing material or an erbium-containing material.
In practical applications, the fuel element of the present invention further includes a honeycomb prismatic fuel assembly loaded in the fuel cartridge, wherein the honeycomb prismatic fuel assembly includes: graphite powder is filled in an array consisting of the silicon carbide cladding, the fuel rods taking the TRISO coated granular fuel as the core body and the silicon carbide tubes.
Compared with the prior art, the fuel element disclosed by the invention has the following advantages:
the present invention provides a fuel element comprising: a plurality of fuel cartridges containing fuel elements, the fuel cartridges having a regular tetrahedron structure, a regular quadrangular prism structure or a regular hexagonal prism structure, the fuel elements being coated with the granular fuel using TRISO; and, the lateral wall of fuel box is seted up a plurality of holes. Therefore, the fuel element provided by the invention comprises a plurality of fuel cartridges containing the fuel element, the fuel element adopts TRISO coated granular fuel, and the fuel cartridges adopt regular tetrahedron structures, regular quadrilateral prism structures or regular hexagonal prism structures, namely, an orderly arrangement mode, so that the reactor core has a compact structure, is convenient for regular refueling, and can be synchronous with the maintenance period, thereby effectively avoiding dust pollution generated during the continuous refueling, being convenient for transportation and saving the cost; in addition, because the side wall of the fuel box is provided with a plurality of holes, the full heat exchange of the fuel element is more facilitated.
The present invention also provides a high temperature gas cooled reactor comprising: a fuel element as claimed in any one of the preceding claims.
The advantages of the high temperature gas cooled reactor and the fuel element are the same compared with the prior art, and the details are not repeated herein.
The present invention also provides a high temperature gas cooled reactor system comprising: a plurality of high temperature gas cooled reactors as described above and using helium as a coolant.
The advantages of the high temperature gas cooled reactor system, the fuel element and the high temperature gas cooled reactor are the same as those of the prior art, and are not described herein again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a first structure of a fuel cartridge in a fuel device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second configuration of a fuel cartridge in a fuel device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third configuration of a fuel cartridge in a fuel device according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a fourth configuration of a fuel cartridge in a fuel device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a fuel cartridge with bundle rod fuel elements in the fuel cartridge according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a cartridge-loaded sleeve assembly in a fuel cartridge in accordance with an embodiment of the present invention;
FIG. 7 is a schematic structural view of a fuel cartridge loaded with honeycomb prismatic fuel assemblies in a fuel element according to an embodiment of the present invention.
In the figure: 11-a fuel element cartridge; 12-control rod thimble tube.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the system or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
At present, the market has very urgent need for high-temperature steam boilers for replacing coal, and small multifunctional power stations in island, remote areas and other isolated areas also have great need. A small high temperature gas cooled reactor is a realistic solution.
The reason is that the basic technology required by the small high-temperature gas cooled reactor is mature or nearly mature in China, and the bottleneck of the manufacturing technology is overcome. The nuclear fuel, the micro-channel heat exchanger, the helium fan and the like have mature manufacturing technologies at home.
The problems encountered by the high-temperature gas cooled reactor at present are mainly that the power of the reactor is high, the specific power of the reactor core is low, and the difficulty of the type selection of a heat exchanger is high.
The proposal is that the maximum power of a small high-temperature gas cooled reactor is 100MW thermal power, a reactor core arrangement mode of shutdown and refueling and fixed lattices is adopted, a power generation mode of carbon dioxide Brayton cycle is adopted, and a micro-channel heat exchanger is adopted.
To speed up the development process, a nuclear reactor with less power can be started first. For example, a multifunctional power station with 50MW thermal power can be developed first to perform project construction, so as to complete the work of system design, equipment verification, and the like. The work can apply for policy support of the military and civil integration technology.
On the basis, taking a high-temperature gas cooled reactor of 50MW and 100MW as a core, the following 3 series of standard modular products are developed:
A. the power generation and seawater desalination are applicable to islands;
B. the power generation and heating system is suitable for northwest remote areas;
C. industrial steam, suitable for industrial parks.
The conceptual design of the project may cooperate with the Qinghua university work system or the atomic energy institute. Engineering design and project construction may work with the atomic energy institute and the east China electric research and design institute.
The method comprises the following specific steps:
FIG. 1 is a schematic diagram of a first structure of a fuel cartridge in a fuel device according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a second configuration of a fuel cartridge in a fuel device according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a third structure of a fuel cartridge in a fuel device according to an embodiment of the present invention.
As shown in fig. 1 to 3, an embodiment of the present invention provides a fuel element including: a plurality of fuel cartridges containing fuel elements, the fuel cartridges having a regular tetrahedral structure (as shown in fig. 1), a regular quadrangular prism structure (as shown in fig. 2), or a regular hexagonal prism structure (as shown in fig. 3), the fuel elements being coated with the particulate fuel using tris; the side wall of the fuel box is provided with a plurality of holes.
Compared with the prior art, the fuel element provided by the embodiment of the invention has the following advantages:
the fuel element provided by the embodiment of the invention, as shown in fig. 1-3, comprises: a plurality of fuel cartridges containing fuel elements in a regular tetrahedral configuration (as shown in fig. 1), a regular quadrangular prism configuration (as shown in fig. 2), or a regular hexagonal prism configuration (as shown in fig. 3), the fuel elements being coated with the granular fuel using tris; and, the lateral wall of fuel box is seted up a plurality of holes. Therefore, as the fuel element provided by the embodiment of the invention comprises the plurality of fuel cartridges containing the fuel element, the fuel element adopts the TRISO coated granular fuel, and the fuel cartridges adopt regular tetrahedron structures, regular quadrilateral prism structures or regular hexagonal prism structures, namely, the regular arrangement mode, the reactor core has a compact structure, is convenient for regular material changing, and can be synchronous with the maintenance period, thereby effectively avoiding dust pollution generated during material changing without stopping the stack, being convenient for transportation, and saving the cost; in addition, because the side wall of the fuel box is provided with a plurality of holes, the full heat exchange of the fuel element is more facilitated.
It should be added here that the solid fuel molten salt pile concept was first proposed by american scientists at the beginning of the century, which uses fluoride molten salt as coolant, graphite as moderator, and Tri-structural iso-Tropic (TRISO) coated granular spherical elements as fuel.
In addition, the fuel particles are mixed fuel bodies which are prepared by dispersing fuel particles of fissile materials or fissile material-convertible material mixtures wrapped by covering layers in a graphite matrix, and the mixed fuel bodies are in a novel fuel element form, not only improve the safety of the fuel elements on the design principle, but also embody the inherent safety characteristics of the fuel elements through actual irradiation tests.
The design of the coated fuel particles goes through two stages. The initial structure was of the BISO type, i.e. a loose pyrolytic carbon layer and a dense pyrolytic carbon layer were deposited successively on the periphery of a spherical fuel core. With the progress of the irradiation test and the post-irradiation safety detection test, the BISO-type coated fuel particles gradually show their structural limitations, mainly manifested by low strength of the deposit and low barrier capability to metal fission products. And then, coating fuel particles with a TRISO type structure are designed, namely, a silicon carbide layer and a compact pyrolytic carbon layer are deposited on the basis of the original loose pyrolytic carbon layer and the compact pyrolytic carbon layer.
FIG. 4 is a diagram illustrating a fourth structure of a fuel cartridge in a fuel device according to an embodiment of the present invention.
In the fuel element provided by the embodiment of the present invention, as shown in fig. 4, the fuel cartridge may have a regular quadrangular prism structure, and may include a plurality of fuel element cartridges 11 and/or control rod thimbles 12; the fuel element cartridge 11 may have a cylindrical structure or a regular quadrangular prism structure, and the fuel element cartridge 11 may be loaded with fuel pellets of the TRISO fuel.
Specifically, in the fuel element provided in the embodiment of the present invention, a plurality of holes may be formed in a side wall of the fuel element cartridge 11.
Further, in the fuel element according to the embodiment of the present invention, graphite nodules may be loaded in the fuel element case 11.
Alternatively, the fuel cartridge 11 may further contain burnable poison balls, and the burnable poison balls include a tris so-coated particulate fuel including an absorber material as a burnable poison, and the absorber material may be a boron-containing material or a gadolinium-containing material or an erbium-containing material.
The burnable poison is arranged in the reactor core and is mainly used for absorbing solid neutron poison with larger initial backup reactivity, deepening burnup and flattening neutron fluence rate distribution. Such as boron, gadolinium and erbium compounds. Along with the operation of the reactor, the burnable poison is gradually reduced due to the absorption of neutrons, and the backup reactivity absorbed by the burnable poison is gradually released again.
FIG. 5 is a schematic structural diagram of a fuel cartridge with a bundle rod fuel element therein according to an embodiment of the present invention.
In practical application, as shown in fig. 5, in the fuel element provided in the embodiment of the present invention, a bundle rod fuel element may be further loaded in the fuel cartridge, and the bundle rod fuel element may include: the fuel rod takes silicon carbide cladding and TRISO coated granular fuel as a core; that is, the bundle rod fuel element may comprise a single or a plurality of silicon carbide thimbles for receiving burnable poison rods or control rods.
FIG. 6 is a schematic diagram of a cartridge-loaded sleeve assembly in a fuel cartridge in accordance with an embodiment of the present invention.
In practical applications, in the fuel element provided by the embodiment of the present invention, as shown in fig. 6, a sleeve assembly may be further loaded in the fuel cartridge, and the sleeve assembly may include: the fuel element is a cylindrical fuel element with a core of silicon carbide cladding and TRISO coated particulate fuel, and the cylindrical fuel element may be plural.
In the fuel element according to the embodiment of the present invention, a graphite rod with a silicon carbide cladding may be inserted into the center of the cylindrical fuel element.
Or, the center of the cylindrical fuel element can be inserted with a graphite rod with silicon carbide cladding or inserted with a burnable poison rod with silicon carbide cladding, the burnable poison rod comprises TRISO coated particle fuel, the TRISO coated particle fuel comprises an absorber material which is burnable poison, and the absorber material can be a boron-containing material or a gadolinium-containing material or an erbium-containing material.
The vertical arrangement of the graphite rods of the silicon carbide cladding can not only form natural circulation, but also improve the uniformity of helium flowing in the reactor core.
Specifically, in the fuel element provided by the embodiment of the present invention, the absorber material may be boron or gadolinium.
FIG. 7 is a schematic structural view of a fuel cartridge loaded with honeycomb prismatic fuel assemblies in a fuel element according to an embodiment of the present invention.
In practical applications, in the fuel element provided by the embodiment of the present invention, as shown in fig. 7, the fuel cartridge may further contain a honeycomb prismatic fuel assembly, and the honeycomb prismatic fuel assembly may include: graphite powder is filled in an array consisting of the silicon carbide cladding, the fuel rods taking the TRISO coated granular fuel as the core body and the silicon carbide tubes.
In the fuel element provided by the embodiment of the invention, the honeycomb prismatic fuel assembly can be a regular quadrangular prism or a regular hexagonal prism.
It should be noted that the coating particles are too small to be used directly, and only the coating particles are dispersed in a graphite matrix and pressed into a fuel compact, and the fuel compact is then packed into fuel elements with different shapes, which are composed of graphite cladding. For example: spherical elements, cylindrical elements, etc.
Further, for example, the prism blocks of the columnar elements can be provided with fuel holes, coolant holes, control rod holes, control poison holes and loading and unloading holes.
Specifically, the reasons for using graphite as the moderator and the primary structural material are: the thermal neutron absorption cross section is small; the mechanical property and the stability are better at high temperature; the thermal shock resistance is good.
An embodiment of the present invention further provides a high temperature gas cooled reactor, including: a fuel element as claimed in any one of the preceding claims.
Compared with the prior art, the high-temperature gas cooled reactor provided by the embodiment of the invention has the following advantages:
in the high-temperature gas cooled reactor provided by the embodiment of the invention, because the fuel element comprises a plurality of fuel cartridges containing the fuel element, the fuel element adopts TRISO coated granular fuel, and the fuel cartridges adopt regular tetrahedron structures, regular quadrilateral prism structures or regular hexagonal prism structures, namely, an orderly arrangement mode, the reactor core has a compact structure, is convenient for regular material changing, and can be synchronous with a maintenance period, thereby effectively avoiding dust pollution generated during material changing without stopping the reactor, being convenient for transportation and saving the cost; in addition, because the side wall of the fuel box is provided with a plurality of holes, the full heat exchange of the fuel element is more facilitated.
An embodiment of the present invention further provides a high temperature gas cooled reactor system, including: a plurality of high temperature gas cooled reactors as described above and using helium as a coolant.
The high-temperature gas cooled reactor takes away heat generated by nuclear reaction by adopting helium as a coolant, and has the characteristics of high thermal efficiency, good inherent safety and the like; and, easy to purify.
Compared with the prior art, the high-temperature gas-cooled reactor system provided by the embodiment of the invention has the following advantages:
in the high-temperature gas-cooled reactor system provided by the embodiment of the invention, because the fuel elements of the high-temperature gas-cooled reactor comprise a plurality of fuel cartridges containing the fuel elements, the fuel elements adopt TRISO coated granular fuel, and the fuel cartridges adopt regular tetrahedron structures, regular quadrilateral prism structures or regular hexagonal prism structures, namely, an orderly arrangement mode, the reactor core has a compact structure, is convenient for regular material changing, and can be synchronous with a maintenance cycle, thereby effectively avoiding dust pollution generated during material changing without shutdown of the reactor, being convenient for transportation, and saving cost; in addition, because the side wall of the fuel box is provided with a plurality of holes, the full utilization and the regular replacement of the fuel element are more facilitated.
The high temperature gas cooled reactor is a reactor developed from a common graphite gas cooled reactor. The working principle is as follows: graphite is used as a moderator, gas helium is used as a coolant (the gas cooling is adopted), and the temperature of the helium is as high as about 800 ℃ (the high temperature is adopted)
The specific process is as follows: when nuclear reaction is carried out by nuclear fuel in the reactor, neutrons are emitted, and neutrons with too high speed are slowed down by graphite collision (because only slow neutrons in the reactor can effectively react with uranium fuel) so as to maintain the nuclear reaction. A large amount of heat is released during nuclear reaction, and if the heat is not taken away, the reactor is burnt, so that gas (helium) flows through the reactor core, the heat is taken to the heat exchanger, the helium is cooled by another path of coolant, and the cooled helium returns to the reactor core to continuously cool the reactor, so that a closed circulation loop is formed.
This is the simplest principle of a high temperature gas cooled reactor. At present, the most used nuclear reactors in the world are pressurized water reactors, particularly nuclear submarines are basically pressurized water reactors, and at present, the nuclear submarines of all countries have no high-temperature gas cooled reactors and are too large in size.
The adoption of excellent coated granular fuel in high temperature gas cooled reactors is the basis for obtaining good safety. The uranium fuel is divided into a plurality of small fuel pellets, each pellet being coated with a layer of low density thermal media carbon, two layers of high density thermal media carbon and a layer of silicon carbide. The fuel element is a novel fuel element form, not only improves the safety of the fuel element in the design principle, but also embodies the inherent safety characteristic through the actual irradiation test. The diameter of the coated particles is less than 1mm, and the coated particle fuel is uniformly dispersed in the matrix of the graphite moderating material to manufacture the spherical fuel element with the diameter of 6 cm. The coating layer fully retains fission products generated in the coated particles, and experiments show that the fuel of the coated particles still maintains the integrity and the release rate of fission gas is still lower than 10 when the fuel is heated for hundreds of hours at the high temperature of 1600 DEG C－4。
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A fuel element, comprising: a plurality of fuel cartridges containing fuel elements, said fuel cartridges employing regular tetrahedral, regular quadrangular prism, or regular hexagonal prism structures, said fuel elements employing tris-coated particulate fuel;
the side wall of the fuel box is provided with a plurality of holes.
2. The fuel element of claim 1, wherein the fuel cartridge is in a regular quadrilateral prism configuration and comprises a plurality of fuel element cartridges and/or control rod thimbles;
the fuel element box adopts a cylindrical structure or a regular quadrilateral prism structure, and fuel balls loaded with TRISO fuel are loaded in the fuel element box.
3. The fuel element of claim 2, wherein the side wall of the fuel element cartridge defines a plurality of apertures.
4. The fuel element of claim 2 or 3, wherein the fuel element cartridge is further loaded with graphite nodules, and the graphite nodules contain neutron absorbing material as a burnable poison;
or, burnable poison balls are loaded in the fuel element box and comprise TRISO coated particle fuel, the TRISO coated particle fuel comprises an absorber material serving as burnable poison, and the absorber material can be a boron-containing material or a gadolinium-containing material or an erbium-containing material.
5. The fuel element of claim 1, further loaded within the cartridge with a bundle rod fuel element, the bundle rod fuel element comprising: silicon carbide cladding, and a fuel rod with a core of TRISO coated particulate fuel.
6. The fuel element of claim 1, wherein a sleeve assembly is further loaded within the cartridge, the sleeve assembly comprising: a silicon carbide cladding, and a cylindrical fuel element having a core of TRISO coated particulate fuel.
7. The fuel element of claim 6, wherein a silicon carbide clad burnable poison rod is inserted in the center of the cylindrical fuel element and comprises a TRISO-clad particulate fuel comprising an absorber material that is a burnable poison and is a boron-containing material or a gadolinium-containing material or an erbium-containing material.
8. The fuel element of claim 1, wherein the fuel cartridge further carries a honeycomb prismatic fuel assembly, the honeycomb prismatic fuel assembly comprising: graphite powder is filled in an array consisting of the silicon carbide cladding, the fuel rods taking the TRISO coated granular fuel as the core body and the silicon carbide tubes.
9. A high temperature gas cooled reactor, comprising: a fuel element according to any one of claims 1 to 8.
10. A high temperature gas cooled reactor system, comprising: a plurality of high temperature gas cooled reactors as claimed in claim 9 and using helium as a coolant.
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| CN202011227084.4A CN112216408A (en) | 2020-11-05 | 2020-11-05 | Fuel element, high-temperature gas-cooled reactor and high-temperature gas-cooled reactor system |
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| CN202011227084.4A CN112216408A (en) | 2020-11-05 | 2020-11-05 | Fuel element, high-temperature gas-cooled reactor and high-temperature gas-cooled reactor system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193905A1 (en) * | 2021-03-15 | 2022-09-22 | 中国核电工程有限公司 | Mixing chamber structure for prismatic high-temperature gas-cooled reactor, and prismatic high-temperature gas-cooled reactor structure |
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- 2020-11-05 CN CN202011227084.4A patent/CN112216408A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193905A1 (en) * | 2021-03-15 | 2022-09-22 | 中国核电工程有限公司 | Mixing chamber structure for prismatic high-temperature gas-cooled reactor, and prismatic high-temperature gas-cooled reactor structure |
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