Gaseous fuel reactor, reactor and reactivity regulation method

Abstract

The embodiment of the invention relates to the technical field of nuclear reactors, in particular to a gaseous fuel reactor, a reactor and a reactivity adjusting method.The gaseous fuel reactor comprises a reactor body, a containing cavity is formed in the reactor body, the containing cavity is arranged to contain gaseous fuel, and a gaseous fuel injection port is formed in the reactor body; the gaseous fuel injection pipe is arranged at the gaseous fuel injection port, and gaseous fuel is input into the containing cavity through the gaseous fuel injection port and the gaseous fuel injection pipe; the gaseous fuel provides heat and transfers the heat to the heat exchange assembly; the reactivity control assembly is arranged to be capable of changing the volume of the gaseous fuel in the containing cavity. According to the gaseous fuel reactor provided by the embodiment of the invention, the gaseous fuel is adopted as the reactor core fuel of the reactor, and the reactivity of the gaseous fuel reactor is controlled by changing the volume of the gaseous fuel in the accommodating cavity through the reactivity control assembly, so that the redundancy and reliability of reactivity control are improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of nuclear reactor, and particularly to a gaseous fuel reactor, a reactor and a reactivity regulation method. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] A reactor is a device for realizing nuclear energy utilization. To ensure the safety performance of the reactor, the reactor should have the ability to quickly shut down under accident conditions.

[0004] For current reactors, such as gaseous fuel reactors, in order to realize their function of quickly shutting down, conventional control rods are usually arranged in the core active area of the gaseous fuel reactor, which will increase the absorption of neutrons by structural materials and is not conducive to reactivity, or control drums are arranged. This control method is relatively single, resulting in poor redundancy and reliability of the reactor. Summary of the Invention

[0005] A brief overview of the present application is given below to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is only to present some concepts in a simplified form as a prelude to the more detailed description to be discussed later.

[0006] In a first aspect, embodiments of the present application provide a gaseous fuel reactor, which includes: a reactor body, gaseous fuel, a heat exchange component, a reactivity control component, and a gaseous fuel injection pipe. The reactor body forms a receiving cavity, and the receiving cavity is configured to receive the gaseous fuel. A gaseous fuel injection port is formed on the reactor body, and the gaseous fuel injection pipe is arranged at the gaseous fuel injection port. The gaseous fuel is input into the receiving cavity through the gaseous fuel injection port and the gaseous fuel injection pipe; the gaseous fuel provides heat and transfers the heat to the heat exchange component; the reactivity control component is configured to be able to change the volume of the gaseous fuel in the receiving cavity.

[0007] The gaseous fuel reactor provided by the embodiments of the present application uses gaseous fuel as the core fuel of the reactor, and controls the reactivity of the gaseous fuel reactor by changing the volume of the gaseous fuel in the receiving cavity through the reactivity control component, which is beneficial to improving the redundancy and reliability of reactivity control.

[0008] Second aspect, an embodiment of the present application further provides a reactor, which includes: a plurality of gaseous fuel active zone containers, gaseous fuel, heat pipes, reactivity control components, gaseous fuel injection pipes, and a moderator. The moderator is arranged between the plurality of gaseous fuel active zone containers; the gaseous fuel is arranged in each gaseous fuel active zone container, the heat pipes are arranged in each gaseous fuel active zone container, and the gaseous fuel is arranged to coat the heat pipes; the reactivity control components are arranged to be able to change the volume of the gaseous fuel in the gaseous fuel active zone container.

[0009] Third aspect, an embodiment of the present application further provides a reactivity adjustment method, which is applicable to the gaseous fuel reactor of the embodiment of the present application, and includes the following steps: S10. Input gaseous fuel into the accommodation cavity of the reactor body through the gaseous fuel injection port and the gaseous fuel injection pipe; S20. During the reaction process, transfer the heat generated by the gaseous fuel during the reaction process to the heat exchange component; S30. Use the reactivity control component to change the volume of the gaseous fuel in the accommodation cavity to adjust the reactivity.

[0010] These and other advantages of the present application will become more obvious through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. Description of the Drawings

[0011] In order to further elaborate the above and other advantages and features of the present application, the following provides a more detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are included in this specification and form a part of this specification together with the following detailed description. Elements having the same function and structure are denoted by the same reference numerals. It should be understood that these drawings only depict typical examples of the present application and should not be regarded as limiting the scope of the present application.

[0012] Figure 1 is a schematic structural diagram of a gaseous fuel reactor according to an embodiment of the present application;

[0013] Figure 2 is a schematic structural diagram of a gaseous fuel reactor according to another embodiment of the present application;

[0014] Figure 3 is a sectional view of a gaseous fuel reactor according to an embodiment of the present application;

[0015] Figure 4 is a schematic structural diagram of a reactivity control component according to an embodiment of the present application;

[0016] Figure 5 is a schematic structural diagram of a reactor according to an embodiment of the present application;

[0017] Figure 6 is a schematic structural diagram of a reactor according to another embodiment of the present application;

[0018] Figure 7 is Figure 6 a cross-sectional view of the reactor shown;

[0019] Figure 8 is Figure 6 a top view of the reactor shown after omitting the reactivity control assembly;

[0020] Figure 9 is a schematic flow chart of the reactivity regulation method according to an embodiment of the present application.

[0021] It should be noted that the drawings are not necessarily drawn to scale, but are shown only in a schematic manner that does not affect the understanding of the reader.

[0022] Explanation of reference numerals:

[0023] 12. Reactor body; 120. Accommodation cavity; 121. Reactor vessel; 122. Reflective layer; 123. Gaseous fuel active zone container; 1231. Gaseous fuel injection port; 1232. Gaseous fuel outlet;

[0024] 40. Gaseous fuel;

[0025] 50. Reactivity control assembly; 51. Driving assembly; 511. First-direction driving member; 5111. High-pressure gas storage member; 5112. High-pressure pulse valve; 5113. First gas control member; 512. Second-direction driving member; 5121. Low-pressure gas storage member; 5122. Low-pressure pulse valve; 5123. Second gas control member; 513. Gas booster; 52. Connecting member; 53. Movable reflective layer; 54. Compression member; 55. Gas pipeline;

[0026] 60. Gaseous fuel injection pipe;

[0027] 71. Moderator; 72. Control drum. Detailed implementation manners

[0028] In the following, exemplary embodiments of the present application will be described with reference to the drawings. For the sake of clarity and conciseness, not all features of the actual implementation manners are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation manner in order to achieve the specific goals of the developer, for example, to comply with those constraints related to the system and business, and these constraints may vary with different implementation manners. In addition, it should also be understood that although the development work may be very complex and time-consuming, for those skilled in the art who benefit from the content of the present application, such development work is merely a routine task.

[0029] Here, it should also be noted that in order to avoid obscuring the present application with unnecessary details, only the device structures and / or processing steps closely related to the solution according to the present application are shown in the drawings, while other details less relevant to the present application are omitted.

[0030] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present application should have the ordinary meanings understood by those with ordinary skills in the field to which the present application belongs.

[0031] In the description of the embodiments of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] For current gaseous fuel reactors, the reactivity of the reactor is usually adjusted by means of control rods or control drums, etc. For example, conventional control rods are arranged in the active zone of the gaseous fuel reactor core or control drums are adopted. However, the setting of control rods will increase the absorption of neutrons by structural materials, which is not conducive to reactivity, and the control method of control drums is relatively single, resulting in poor reliability of the gaseous fuel reactor.

[0033] In view of the above technical problems, the embodiments of the present application provide a gaseous fuel reactor. Figure 1 is a schematic structural diagram of a gaseous fuel reactor according to an embodiment of the present application. Figure 2 is a schematic structural diagram of a gaseous fuel reactor according to another embodiment of the present application. Figure 3 is a sectional view of a gaseous fuel reactor according to an embodiment of the present application, as Figures 1 to 3 shown, the gaseous fuel reactor may include: a reactor body 12, gaseous fuel 40, a heat exchange component (not shown in the figure), a reactivity control component 50, and a gaseous fuel injection pipe 60. It can be understood that in the Figure 1 and Figure 2 shown gaseous fuel reactors, the gaseous fuel injection pipe 60 is not shown.

[0034] The reactor body 12 forms a receiving cavity 120, the receiving cavity 120 is arranged to receive the gaseous fuel 40, a gaseous fuel injection port 1231 is formed on the reactor body 12, the gaseous fuel injection pipe 60 is arranged at the gaseous fuel injection port 1231, and the gaseous fuel 40 is input into the receiving cavity 120 through the gaseous fuel injection port 1231 and the gaseous fuel injection pipe 60. The gaseous fuel 40 provides heat and transfers the heat to the heat exchange component. The reactivity control component 50 is arranged to be able to change the volume of the gaseous fuel 40 in the receiving cavity 120.

[0035] The gaseous fuel reactor provided by the embodiments of the present application uses gaseous fuel 40 as the core fuel of the reactor, and controls the reactivity of the gaseous fuel reactor by changing the volume of the gaseous fuel 40 in the accommodation chamber 120 through the reactivity control assembly 50, which is beneficial to improving the redundancy and reliability of reactivity control.

[0036] In some embodiments, the gaseous fuel 40 may be uranium fluoride fuel, such as uranium hexafluoride (UF6), uranium tetrafluoride (UF4), etc. It can be understood that using uranium fluoride fuel as the gaseous fuel 40 is only an embodiment of the present application, and the gaseous fuel 40 may also be any other gas that can be used as fuel, and the present application does not limit this.

[0037] In some embodiments, the gaseous fuel reactor may include heat pipes, and the heat provided by the gaseous fuel 40 can be transferred to the heat exchange assembly through the heat pipes.

[0038] The embodiments of the present application use heat pipes to transfer heat between the gaseous fuel 40 and the heat exchange assembly. Since the heat pipes are not power components and do not require additional driving parts during the heat transfer process, it is beneficial to reduce the number of components of the gaseous fuel reactor, simplify the structure of the gaseous fuel reactor, and improve its operating stability.

[0039] In some embodiments, the heat pipe may include a heat conduction part, a wire mesh, and a heat pipe cladding. Among them, the heat conduction part and the wire mesh are sequentially arranged inside the heat pipe cladding, and the wire mesh is located outside the heat conduction part. In such an embodiment, the material of the heat conduction part may be an alkali metal.

[0040] In some embodiments, the gaseous fuel reactor further includes a control drum 72 for controlling the reactivity of the gaseous fuel reactor. In such an embodiment, the control drum 72 and the reactivity control assembly 50 are used together to control the reactivity of the gaseous fuel reactor, which is beneficial to improving the redundancy and reliability of reactivity control.

[0041] In some embodiments, as Figures 1 to 3 shown, the reactor body 12 includes a reactor vessel 121, a reflector 122, and a gaseous fuel active zone vessel 123. The reflector 122 is arranged inside the reactor vessel 121, the gaseous fuel active zone vessel 123 is arranged inside the reflector 122, and the gaseous fuel active zone vessel 123 forms an accommodation chamber 120.

[0042] In some embodiments, the side wall of the gaseous fuel active zone vessel 123 forms a gaseous fuel injection port 1231 and a gaseous fuel injection outlet 1232. The gaseous fuel 40 enters the accommodation chamber 120 through the gaseous fuel injection port 1231 and leaves the accommodation chamber 120 from the gaseous fuel injection outlet 1232 without passing through other components, which is beneficial to improving the efficiency of the gaseous fuel 40 entering and leaving the accommodation chamber 120 and is easy to implement.

[0043] In some embodiments, the gaseous fuel injection port 1231 and the gaseous fuel outlet 1232 may adopt a flat channel or a dome channel structure to stir the gaseous fuel 40 so that the gaseous fuel 40 is evenly distributed. In such an embodiment, the reactor body 12 may adopt a container with an upper and lower dome structure to prevent the gaseous fuel 40 from leaking.

[0044] In some embodiments, Figure 3 As shown, the gaseous fuel injection port 1231 can be relatively arranged above the gaseous fuel injection port 1232, which is beneficial for the gaseous fuel 40 to take away the heat of the gaseous fuel reactor when leaving the gaseous fuel reactor from the gaseous fuel injection port 1232 and exchange heat with the external heat exchanger.

[0045] It is understandable that the gaseous fuel injection port 1231 may also be relatively disposed below the gaseous fuel injection port 1232 .

[0046] In some embodiments, Figure 3 As shown, the reactivity control assembly 50 includes a driving assembly 51, a connecting member 52, a movable reflecting layer 53, and a compression member 54. The connecting member 52 is configured to be fixedly connected to the driving assembly 51, the connecting member 52 is configured to be fixedly connected to the movable reflecting layer 53, and the compression member 54 is configured to be fixedly connected to the movable reflecting layer 53; the driving assembly 51 is disposed outside the reactor body 12, and is configured to drive the compression member 54 to move within the reactor body 12 to change the volume of the gaseous fuel 40 within the accommodating chamber 120.

[0047] The embodiment of the present application utilizes a drive assembly 51 to drive the compressor 54 to move within the reactor body 12, thereby achieving the purpose of changing the volume of the gaseous fuel 40 within the accommodating chamber 120. This can directly change the density of the gaseous fuel 40 and achieve the purpose of quickly adjusting the reactivity. At the same time, it can also change the neutron leakage rate, and the adjustment efficiency is relatively high and relatively reliable.

[0048] In some embodiments, the connector 52 and the drive assembly 51 may be fixedly connected via a positioning pin. It is understandable that using a fixing pin to fix the connector 52 and the drive assembly 51 is only one embodiment of the present application. Those skilled in the art may also use other methods to fix the two, and the present application does not impose any restrictions on this.

[0049] In some embodiments, the driving assembly 51 may be a stepper motor assembly or a servo motor assembly, etc.

[0050] In some embodiments, the compression member 54 may be configured as a piston or any other component capable of reciprocating movement within the reactor body 12 .

[0051] In some embodiments, the number of compression members 54 can be one or more. When the number of compression members 54 is one, the compression member 54 can be arranged at the upper or lower part of the reactor body 12; when the number of compression members 54 is multiple, the compression members 54 can be respectively arranged at the upper and lower parts of the reactor body 12.

[0052] For the convenience of description and understanding, the following takes the compression member 54 arranged at the upper part of the reactor body 12 as an example to illustrate the process of the compression member 54 moving in the reactor body 12.

[0053] Exemplarily, when the compression member 54 moves downward along the extension direction of the reactor body 12 (simply referred to as the compression member 54 moving downward in the following embodiments), the movable reflector 53 follows the compression member 54 to move downward, and the gaseous fuel 40 is compressed. At this time, the reactivity of the gaseous fuel reactor can be increased; when the compression member 54 moves upward along the extension direction of the reactor body 12 (simply referred to as the compression member 54 moving upward in the following embodiments), the movable reflector 53 follows the compression member 54 to move upward, and the gaseous fuel 40 expands. At this time, the reactivity of the gaseous fuel reactor can be decreased.

[0054] In some embodiments, the lower end of the gaseous fuel injection pipe 60 extends below the lowest position where the compression member 54 moves, so as to avoid interference between the gaseous fuel injection pipe 60 and the compression member 54 and affect the movement of the compression member 54.

[0055] In some embodiments, Figure 4 is a schematic structural diagram of a reactivity control assembly according to an embodiment of the present application, as Figure 4 shown, the driving assembly 51 includes a first-direction driving member 511 and a second-direction driving member 512. The first-direction driving member 511 is arranged to drive the compression member 54 to move along the first direction by using gas; the second-direction driving member 512 is arranged to drive the compression member 54 to move along the second direction by using gas, wherein the first direction and the second direction are opposite.

[0056] By arranging the driving assembly 51 to include the first-direction driving member 511 and the second-direction driving member 512, and respectively driving the compression member 54 to move in two opposite directions by using the first-direction driving member 511 and the second-direction driving member 512, the embodiment of the present application can realize the reciprocating movement of the compression member 54, thereby flexibly adjusting the volume of the gaseous fuel 40, which is beneficial to improving the flexibility of reactivity adjustment.

[0057] In some embodiments, as Figure 4 shown, the driving assembly 51 further includes a gas booster 513, and the gas booster 513 is arranged to be in fluid communication with the first-direction driving member 511 and the second-direction driving member 512.

[0058] In an embodiment of the present application, the gas booster 513 is arranged to be in fluid communication with the first-direction drive member 511 and the second-direction drive member 512, which is beneficial to flexibly adjust the gas flow between the first-direction drive member 511 and the second-direction drive member 512.

[0059] In some embodiments, as Figure 4 shown, the first-direction drive member 511 includes a high-pressure gas storage member 5111, a high-pressure pulse valve 5112, and a first gas control member 5113. The high-pressure gas storage member 5111 is arranged to be in fluid communication with the gas booster 513. The high-pressure pulse valve 5112 is arranged to be in fluid communication with the high-pressure gas storage member 5111 for controlling the flow of high-pressure gas. The high-pressure pulse valve 5112 is arranged to be in fluid communication with the first gas control member 5113, and the first gas control member 5113 is arranged to control the inflow or non-inflow of gas into the reactor body 12.

[0060] In an embodiment of the present application, the first-direction drive member 511 is arranged to have a structure including a high-pressure gas storage member 5111, a high-pressure pulse valve 5112, and a first gas control member 5113. By pulse controlling the flow of high-pressure gas, it helps to improve the control accuracy of high-pressure gas and is beneficial to setting dynamic response to achieve real-time and accurate adjustment of the reactivity of the gaseous fuel reactor.

[0061] In some embodiments, the high-pressure gas stored in the high-pressure gas storage member 5111 can be an inert gas such as helium.

[0062] In some embodiments, the gaseous fuel reactor further includes a main controller, a position sensor, and a pressure sensor. Among them, the main controller is used to control the high-pressure pulse valve 5112 and the first gas control member 5113. The position sensor is used to detect the position of the compression member 54, and the pressure sensor is used to detect the gas pressure in the accommodation chamber 120.

[0063] When it is necessary to adjust the reactivity of the gaseous fuel reactor, for example, to increase the reactivity, the high-pressure pulse valve 5112 can be controlled to open first, and then the gas stored in the high-pressure gas storage member 5111 is injected into the accommodation chamber 120 to push the compression member 54 to move downward. The position of the compression member 54 and the gas pressure in the accommodation chamber 120 are respectively monitored in real time by the position sensor and the pressure sensor and are fed back to the main controller in real time, so that the main controller can control the downward movement position of the compression member 54, the gas injection pressure, and the gas flow rate in the high-pressure gas storage member 5111.

[0064] In some embodiments, the drive assembly 51 further includes a gas pipeline 55. The high-pressure gas storage member 5111, the high-pressure pulse valve 5112, the first gas control member 5113, and the gas booster 513 can be respectively connected through the gas pipeline 55.

[0065] In some embodiments, such as Figure 4 shown, the second-direction driving member 512 includes a low-pressure gas storage member 5121, a low-pressure pulse valve 5122, and a second gas control member 5123. The low-pressure gas storage member 5121 is arranged to be in fluid communication with the gas pressurizing member 513. The low-pressure pulse valve 5122 is arranged to be in fluid communication with the low-pressure gas storage member 5121 for controlling the flow of low-pressure gas. The low-pressure pulse valve 5122 is arranged to be in fluid communication with the second gas control member 5123, and the second gas control member 5123 is arranged to allow or prevent the gas in the reactor body 12 from flowing into the low-pressure gas storage member 5121.

[0066] In the embodiments of the present application, by arranging the low-pressure pulse valve 5122 to be in fluid communication with the low-pressure gas storage member 5121 and arranging the low-pressure pulse valve 5122 to be in fluid communication with the second gas control member 5123, it is beneficial to solve the problem of low-pressure gas storage. Arranging the low-pressure gas storage member 5121 to be in fluid communication with the gas pressurizing member 513 can realize the recycling of gas and improve the economy of the gaseous fuel reactor.

[0067] In some embodiments, when it is necessary to move the compression member 54 upward, the first gas control member 5113 and the high-pressure pulse valve 5112 are closed, and then the second gas control member 5123 and the low-pressure pulse valve 5122 are opened. Under the action of the pressure difference, the gas can be recovered into the low-pressure gas storage member 5121. The position of the compression member 54 and the gas pressure in the accommodation cavity 120 can be respectively monitored in real time through a position sensor and a pressure sensor, and the real-time feedback is sent to the main controller. In such an embodiment, by the coordinated cooperation of the components in the above-mentioned second-direction driving member 512, the purpose of resetting the compression member 54 can be achieved, that is, when the compression member 54 rises to the initial position, the reset process ends.

[0068] In some embodiments, the low-pressure gas storage member 5121, the low-pressure pulse valve 5122, the second gas control member 5123, and the gas pressurizing member 513 can be respectively connected through a gas pipeline 55.

[0069] In some embodiments, the reactivity control assembly 50 further includes a sealing member for sealing between the compression member 54 and the reactor body 12 to prevent gas leakage.

[0070] In some embodiments, the sealing member can be a sealing gas ring and / or a sealing gas valve. For example, if the compression member 54 is a piston, a sealing valve or a sealing gas ring can be respectively arranged in the inner and outer groove of the piston. In such an embodiment, the material of the sealing gas valve can be a nickel-based alloy.

[0071] It can be understood that the above description of the type of the seal and its material is merely exemplary, and other components with any sealing function can also be selected as the seal, and the present application does not limit this.

[0072] The embodiment of the present application also provides a reactor. Figure 5 It is a schematic structural diagram of a reactor according to an embodiment of the present application. Figure 6 It is a schematic structural diagram of a reactor according to another embodiment of the present application. Figure 7 It is Figure 6 a cross-sectional view of the reactor shown in Figure 8 It is Figure 6 a top view of the reactor shown in Figures 5 to 8 after omitting the reactivity control assembly, as shown in

[0073] The gaseous fuel reactor provided by the embodiment of the present application uses gaseous fuel 40 as the fuel of the reactor, and changes the volume of gaseous fuel 40 in the accommodation chamber 120 through the reactivity control assembly 50 to control the reactivity of the gaseous fuel reactor, which is beneficial to improving the redundancy and reliability of reactivity control, and can also flexibly adjust the number of gaseous fuel active zone containers 123 according to the power demand of the reactor, so that the power of the reactor reaches the target power. At the same time, a heat pipe is used to transfer heat between the gaseous fuel 40 and the heat exchange assembly. Since the heat pipe is not a power component and does not require an additional driving part to drive during its heat transfer process, it is beneficial to reduce the number of components of the gaseous fuel reactor, simplify the structure of the gaseous fuel reactor, and improve its operating stability.

[0074] The embodiment of the present application also provides a reactivity regulation method, which is applicable to the gaseous fuel reactor of the embodiment of the present application. Figure 9 It is a schematic flowchart of the reactivity regulation method according to the embodiment of the present application, as shown in Figure 9 and the method includes the following steps S10 to step S30.

[0075] S10. Input gaseous fuel 40 into the accommodation chamber 120 of the reactor body 12 through the gaseous fuel injection port 1231 and the gaseous fuel injection pipe 60.

[0076] S20. During the reaction, transfer the heat generated by the gaseous fuel 40 during the reaction to the heat exchange component.

[0077] S30. Use the reactivity control component 50 to change the volume of the gaseous fuel 40 in the accommodation chamber 120 to adjust the reactivity.

[0078] The method provided by the embodiment of the present application controls the reactivity of the gaseous fuel reactor by changing the volume of the gaseous fuel 40 in the accommodation chamber 120 through the reactivity control component 50, which is beneficial to improving the redundancy and reliability of reactivity control, thereby improving the stability of the operation of the gaseous fuel reactor.

[0079] For the embodiments of the present application, it should also be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0080] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A gaseous fuel reactor, characterized in that, It includes: A reactor body, gaseous fuel, a heat exchange component, a reactivity control component, and a gaseous fuel injection pipe. The reactor body forms a containment cavity configured to contain the gaseous fuel. A gaseous fuel injection port is formed on the reactor body. The gaseous fuel injection pipe is disposed at the gaseous fuel injection port, and the gaseous fuel is input into the containment cavity through the gaseous fuel injection port and the gaseous fuel injection pipe. The gaseous fuel provides heat and transfers the heat to the heat exchange component. The reactivity control component is configured to be able to change the volume of the gaseous fuel in the containment cavity.

2. The gaseous fuel reactor according to claim 1, wherein The reactivity control component includes a driving component, a connecting piece, a movable reflector, and a compression piece. The connecting piece is configured to be fixedly connected to the driving component and is configured to be fixedly connected to the movable reflector. The compression piece is configured to be fixedly connected to the movable reflector. The driving component is disposed outside the reactor body and is configured to drive the compression piece to move within the reactor body to change the volume of the gaseous fuel in the containment cavity.

3. The gaseous fuel reactor according to claim 2, wherein The lower end of the gaseous fuel injection pipe extends below the lowest position where the compression piece moves.

4. The gaseous fuel reactor according to claim 2, wherein The driving component includes a first-direction driving piece and a second-direction driving piece. The first-direction driving piece is configured to drive the compression piece to move along a first direction by using gas. The second-direction driving piece is configured to drive the compression piece to move along a second direction by using gas, wherein the first direction is opposite to the second direction.

5. The gaseous fuel reactor according to claim 4, wherein The driving component further includes a gas pressurizing piece, which is configured to be in fluid communication with the first-direction driving piece and the second-direction driving piece.

6. The gaseous fuel reactor according to claim 5, wherein The first-direction driving piece includes a high-pressure gas storage piece, a high-pressure pulse valve, and a first gas control piece. The high-pressure gas storage piece is configured to be in fluid communication with the gas pressurizing piece. The high-pressure pulse valve is configured to be in fluid communication with the high-pressure gas storage piece and is used to control the flow of high-pressure gas. The high-pressure pulse valve is configured to be in fluid communication with the first gas control piece, and the first gas control piece is configured to control the gas to flow into or not flow into the reactor body.

7. The gaseous fuel reactor according to claim 5, wherein The second-direction driving piece includes a low-pressure gas storage piece, a low-pressure pulse valve, and a second gas control piece. The low-pressure gas storage piece is configured to be in fluid communication with the gas pressurizing piece. The low-pressure pulse valve is configured to be in fluid communication with the low-pressure gas storage piece and is used to control the flow of low pressure. The low-pressure pulse valve is arranged to be in fluid communication with the second gas control member, and the second gas control member is arranged to allow the gas in the reactor body to flow into or not flow into the low-pressure gas storage member.

8. The gaseous fuel reactor according to claim 2, wherein The reactivity control assembly further includes a seal for sealing between the compression member and the reactor body.

9. A reactor, characterized in that, It includes: A plurality of gaseous fuel active zone containers, gaseous fuel, heat pipes, a reactivity control assembly, a gaseous fuel injection pipe, and a moderator, The moderator is arranged between the plurality of gaseous fuel active zone containers; The gaseous fuel is arranged in each gaseous fuel active zone container, the heat pipe is arranged in each gaseous fuel active zone container, and the gaseous fuel is arranged to cover the heat pipe; The reactivity control assembly is arranged to be able to change the volume of the gaseous fuel in the gaseous fuel active zone container.

10. A reactivity regulation method applicable to the gaseous fuel reactor according to any one of claims 1-8, characterized in that, It includes the following steps: S10. Input gaseous fuel into the accommodation cavity of the reactor body through the gaseous fuel injection port and the gaseous fuel injection pipe; S20. During the reaction process, transfer the heat generated by the gaseous fuel during the reaction to the heat exchange assembly; S30. Use the reactivity control assembly to change the volume of the gaseous fuel in the accommodation cavity to adjust the reactivity.

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