Method and device for reaching criticality in high temperature gas-cooled reactor under helium atmosphere

Abstract

The present disclosure relates to the field of high temperature gas-cooled reactor physics, and provides a method and device for a high temperature gas-cooled reactor to reach criticality under a helium atmosphere, the method comprising: initializing the high temperature gas-cooled reactor; lifting the regulating rod and the compensating rod horizontally to a preset rod position, and recording the current source range count rate; lifting the regulating rod and the compensating rod horizontally to a first preset height, and recording the current source range count rate; calculating the extrapolated critical rod position according to the previous two source range count rates, and determining the target rod lifting height based on the extrapolated critical rod position, the current second rod position, and the second preset height; lifting the regulating rod and the compensating rod horizontally to the target rod lifting height to the target rod position, and recording the new second rod position and the second source range count rate after the source range count rate is stable; repeating the steps of calculating the extrapolated critical rod position to record the new second source range count rate until the preset conditions are met, and the high temperature gas-cooled reactor is transitioned to a critical or supercritical state. The present disclosure can enable the high temperature gas-cooled reactor to reach a critical or supercritical state safely and efficiently under a helium atmosphere.

Description

Technical Field

[0001] The present invention relates to the technical field of high temperature gas-cooled reactor physics, and in particular to a method and device for reaching criticality of a high temperature gas-cooled reactor in a helium atmosphere. Background Art

[0002] In the prior art, the core loading and reactivity control methods of the pebble bed high temperature gas-cooled reactor are quite different from those of the pressurized water reactor. A reactivity control system, i.e., a control rod system, is usually provided in the graphite side reflector layer near the active zone of the high temperature gas-cooled reactor. At the same time, another reactivity control system with a different working principle and independent existence, i.e., an absorption ball shutdown system, is also provided.

[0003] The control rod system is the main reactivity control system, including safety rods, compensating rods, and regulating rods, and has the following functions: 1) Used for reactivity regulation of operating conditions such as reactor startup, power increase and decrease, and normal power operation adjustment; 2) Used for emergency shutdown; 3) Using only the control rod system, the reactor can reach and remain in a normal shutdown state.

[0004] The absorber ball shutdown system is an auxiliary shutdown system. It is used together with the control rod system to enable the reactor to maintain shutdown margin to meet requirements during cold shutdown and maintenance shutdown.

[0005] Therefore, there are some differences between the way a high temperature gas-cooled reactor reaches criticality and the way a pressurized water reactor reaches criticality. However, the prior art lacks a method for changing the state of the high temperature gas-cooled reactor reactivity control system to make the reactor achieve criticality in a helium atmosphere. Summary of the invention

[0006] The present disclosure aims to solve at least one of the problems existing in the prior art and to provide a method and device for a high temperature gas-cooled reactor to reach criticality in a helium atmosphere.

[0007] In one aspect of the present disclosure, a method for achieving criticality in a high temperature gas-cooled reactor in a helium atmosphere is provided, comprising the following steps:

[0008] S110, initializing the high temperature gas-cooled reactor: the high temperature gas-cooled reactor is in a helium atmosphere, and reaches an initial fully loaded core height, all absorption balls are located in the upper core storage tank, all safety rods are located at a preset upper limit, and all regulating rods and compensation rods are located at a preset lower limit;

[0009] S120, lifting all adjustment rods and all compensation rods horizontally to the preset rod positions, and after the source range count rate is stable, recording the current first rod position and the first source range count rate;

[0010] S130, lifting all adjustment rods and all compensation rods to a first preset height, and after the source range count rate is stable, recording the current second rod position and the second source range count rate;

[0011] S140, calculating the extrapolated critical rod position according to the previous two source range count rates, and determining the target rod lifting height based on the extrapolated critical rod position, the current second rod position and the second preset height;

[0012] S150, lifting all adjustment rods and all compensation rods to the target rod lifting height to the target rod position, and after the source range count rate is stable, recording the new second rod position and the new second source range count rate;

[0013] S160, repeating step S140 and step S150 until the difference between the extrapolated critical rod position and the current average rod position is less than a preset critical difference, and transitioning the high temperature gas-cooled reactor to a critical state or a supercritical state.

[0014] Optionally, the extrapolated critical rod position is calculated based on the previous two source range count rates, including:

[0015] The extrapolated critical rod position is calculated based on the previous two source range counting rates and the counting rate of the He-3 counter tube.

[0016] Optionally, determining a target stick lifting height based on the extrapolated critical stick position, the current second stick position, and the second preset height includes:

[0017] The target stick lifting height is determined based on the difference between the extrapolated critical stick position and the current second stick position and the second preset height.

[0018] Optionally, determining a target stick lifting height based on the difference between the extrapolated critical stick position and the current second stick position and the second preset height includes:

[0019] The minimum value between one third of the difference and the second preset height is determined as the target stick lifting height.

[0020] Optionally, transitioning the high temperature gas-cooled reactor to a critical state or a supercritical state includes:

[0021] The regulating rods and the compensating rods are sequentially raised one by one to a third preset height. During the raising process, if the growth of the neutron count rate tends to be stable or the high temperature gas-cooled reactor has a stable doubling cycle, the rod raising is stopped;

[0022] When the source range count rate reaches the preset critical value, the control rod position is adjusted to make the count rate stabilize and the high temperature gas-cooled reactor reaches a critical state.

[0023] Optionally, after the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state, the method further comprises the following steps:

[0024] An adjusting rod or compensating rod is inserted downward to make the high temperature gas-cooled reactor reach a subcritical state.

[0025] Optionally, the preset rod position is a position where positive reactivity is not introduced into the core or where the positive reactivity introduced is less than a preset threshold.

[0026] Another aspect of the present disclosure provides a device for achieving criticality in a high temperature gas-cooled reactor under a helium atmosphere, comprising:

[0027] Initialization module, used to initialize the high temperature gas-cooled reactor: the high temperature gas-cooled reactor is in helium atmosphere, it reaches the initial full-load core height, all absorption balls are located in the upper core storage tank, all safety rods are located at the preset upper limit, and all regulating rods and compensation rods are located at the preset lower limit;

[0028] The first horizontal lifting module is used to horizontally lift all adjustment rods and all compensation rods to the preset rod positions, and after the source range count rate is stable, record the current first rod position and the first source range count rate;

[0029] The second horizontal lifting module is used to horizontally lift all the adjustment rods and all the compensation rods to a first preset height, and after the source range count rate is stable, record the current second rod position and the second source range count rate;

[0030] A determination module, used to calculate the extrapolated critical rod position according to the previous two source range count rates, and determine the target rod lifting height based on the extrapolated critical rod position, the current second rod position and the second preset height;

[0031] The third horizontal lifting module is used to horizontally lift all adjustment rods and all compensation rods to a target rod lifting height value and a target rod position, and after the source range count rate is stable, record a new second rod position and a new second source range count rate;

[0032] The transition module is used to repeatedly trigger the determination module and the third level-raising module until the difference between the extrapolated critical rod position and the current average rod position is less than the preset critical difference, so as to transition the high-temperature gas-cooled reactor to a critical state or a supercritical state.

[0033] Another aspect of the present disclosure provides an electronic device, including:

[0034] at least one processor; and,

[0035] a memory communicatively connected to at least one processor; wherein,

[0036] The memory stores instructions that can be executed by at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for reaching criticality of a high temperature gas-cooled reactor in a helium atmosphere as described above.

[0037] Another aspect of the present disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for achieving criticality of a high-temperature gas-cooled reactor in a helium atmosphere as described above.

[0038] Compared with the prior art, the present invention first initializes the high temperature gas-cooled reactor, then lifts all the regulating rods and all the compensating rods to a preset rod position, records the current first rod position and the first source range count rate after the source range count rate is stable, then lifts all the regulating rods and all the compensating rods to a first preset height, records the current second rod position and the second source range count rate after the source range count rate is stable, calculates the extrapolated critical rod position based on the previous two source range count rates, and determines the target rod lifting height based on the extrapolated critical rod position, the current second rod position and the second preset height, and lifts all the regulating rods and all the compensating rods to a first preset height. Lift the target rod height horizontally to the target rod position, and after the source range count rate stabilizes, record the new second rod position and the new second source range count rate, and repeat the above steps of calculating the extrapolated critical rod position according to the previous two source range count rates to record the new second rod position and the new second source range count rate, until the difference between the extrapolated critical rod position and the current average rod position is less than the preset critical difference, and the high temperature gas-cooled reactor is transitioned to the critical state or the supercritical state, so as to achieve the high temperature gas-cooled reactor in a helium atmosphere to reach the critical state or the supercritical state safely and efficiently, and on this basis, carry out subsequent low-power tests or increase the reactor power. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0040] Figure 1 A flow chart of a method for a high temperature gas-cooled reactor to reach criticality in a helium atmosphere provided in one embodiment of the present disclosure;

[0041] Figure 2 A schematic structural diagram of a device for achieving criticality in a helium atmosphere for a high temperature gas-cooled reactor provided by another embodiment of the present disclosure;

[0042] Figure 3 A schematic structural diagram of an electronic device provided in another embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in each embodiment of the present disclosure, many technical details are proposed in order to enable readers to better understand the present disclosure. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection in the present disclosure can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present disclosure. The various embodiments can be combined and referenced with each other without contradiction.

[0044] One embodiment of the present disclosure relates to a method for achieving criticality of a high temperature gas-cooled reactor in a helium atmosphere, wherein the process is as follows: Figure 1 As shown, the following steps are included:

[0045] S110, initializing the high temperature gas-cooled reactor: the high temperature gas-cooled reactor is in a helium atmosphere, and reaches an initial fully loaded core height, all absorption balls are located in the upper core storage tank, all safety rods are located at the preset upper limit positions, and all adjustment rods and compensation rods are located at the preset lower limit positions.

[0046] Specifically, in this step, a 6.05 m graphite ball cushion layer may be installed at the bottom of the core, and the high-dimensional gas-cooled reactor reaches the initial fully loaded core height.

[0047] The core temperature must ensure that when all the absorber balls are located in the upper core storage tank and all the safety rods can be raised to the preset upper limit, the high temperature gas-cooled reactor has a certain degree of subcriticality. For example, the average reactor temperature can be set to be higher than 150°C to ensure that when all the absorber balls are located in the upper core storage tank and all the safety rods can be raised to the preset upper limit, the high temperature gas-cooled reactor has a certain degree of subcriticality.

[0048] S120, lift all adjustment rods and all compensation rods horizontally to the preset rod positions, and after the source range count rate is stable, record the current first rod position and the first source range count rate.

[0049] Specifically, this step can lift all the regulating rods and all the compensating rods to the preset rod positions at one time according to the core loading and the control rod theoretical value curve. When there is a He-3 counter tube, the He-3 counter tube count can also be recorded after the source range count rate is stable.

[0050] Exemplarily, the preset rod position may be a position where no positive reactivity is introduced into the core or where the positive reactivity introduced is less than a preset threshold value. For example, the preset rod position may be the 6000 mm rod position.

[0051] By setting the preset rod position to a position where no positive reactivity is introduced into the core or where the introduced positive reactivity is less than a preset threshold, the problem of reduced efficiency caused by multiple rod lifting in a worthless area when there is a graphite ball cushion layer at the bottom of the core can be avoided.

[0052] S130, lifting all adjustment rods and all compensation rods to a first preset height, and after the source range count rate is stable, recording the current second rod position and the second source range count rate.

[0053] For example, the first preset height may be 200 mm. When a He-3 counter tube is present, this step may also record the counts of the He-3 counter tube after the source range count rate is stable.

[0054] S140, calculating the extrapolated critical rod position according to the previous two source range count rates, and determining the target rod lifting height based on the extrapolated critical rod position, the current second rod position and the second preset height.

[0055] Specifically, this step can calculate the extrapolated critical rod position based on the first two source range count rates, that is, the count rates of the two channels of the source range, including the first source range count rate and the second source range count rate. For example, the extrapolated critical rod position can be calculated based on the first two source range count rates using the similar triangle method.

[0056] Exemplarily, when there is a He-3 counter tube, the extrapolated critical rod position is calculated according to the previous two source range count rates, and the extrapolated critical rod position may also be calculated according to the previous two source range count rates and the count rate of the He-3 counter tube. That is, when there is a He-3 counter tube, this step may also calculate the extrapolated critical rod position according to the previous two source range count rates and the count rate of the He-3 counter tube.

[0057] It should be noted that this step does not limit the specific method of calculating the extrapolated critical rod position based on the previous two source range count rates, as long as the extrapolated critical rod position can be calculated based on the previous two source range count rates, or when there is a He-3 counter tube, the extrapolated critical rod position can be calculated based on the previous two source range count rates and the count rate of the He-3 counter tube.

[0058] Exemplarily, determining a target stick lifting height based on the extrapolated critical stick position, the current second stick position, and the second preset height includes:

[0059] The target stick lifting height is determined based on the difference between the extrapolated critical stick position and the current second stick position and the second preset height.

[0060] Specifically, in this step, a part of the difference between the extrapolated critical rod position and the current second rod position can be compared with the second preset height, and the minimum value between the two is used as the target rod lifting height. The second preset height can be 200 mm.

[0061] Preferably, determining the target stick-lifting height based on the difference between the extrapolated critical stick position and the current second stick position and the second preset height includes: determining the target stick-lifting height as the minimum value between one-third of the difference and the second preset height. That is, in this step, the minimum value between one-third of the difference between the extrapolated critical stick position and the current second stick position and the second preset height can be used as the target stick-lifting height, so as to determine the target stick-lifting height for the next step of stick-lifting according to the target stick-lifting height.

[0062] By determining the target rod lifting height as the minimum value of one third of the difference and the second preset height, it is possible to avoid the unsafe factors caused by excessive reactivity when extrapolating the rod lifting in the nonlinear area and to avoid the problem of increased time consumption caused by too many extrapolations.

[0063] S150, all adjustment rods and all compensation rods are lifted horizontally to the target rod lifting height to the target rod position, and after the source range count rate is stable, the new second rod position and the new second source range count rate are recorded.

[0064] Specifically, when a He-3 counter tube exists, this step can also record new He-3 counter tube counts after the source range count rate is stabilized.

[0065] S160, repeating step S140 and step S150 until the difference between the extrapolated critical rod position and the current average rod position is less than a preset critical difference, and transitioning the high temperature gas-cooled reactor to a critical state or a supercritical state.

[0066] Specifically, the extrapolated critical rod position here can be calculated based on the previous two source range count rates, or can be calculated based on the previous two source range count rates and the count rate of the He-3 counter tube, and this embodiment does not limit this. The preset critical difference can be 50mm, that is, when the difference between the extrapolated critical rod position and the current average rod position is less than 50mm, the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state, and when the difference between the extrapolated critical rod position and the current average rod position is not less than 50mm, steps S140 and S150 are repeated until the difference between the new extrapolated critical rod position and the new current average rod position is less than 50mm.

[0067] Compared with the prior art, the embodiment of the present disclosure first initializes the high temperature gas-cooled reactor, then all the regulating rods and all the compensating rods are horizontally lifted to the preset rod positions, after the source range count rate is stable, the current first rod position and the first source range count rate are recorded, then all the regulating rods and all the compensating rods are horizontally lifted to the first preset height, after the source range count rate is stable, the current second rod position and the second source range count rate are recorded, and the extrapolated critical rod position is calculated based on the previous two source range count rates, and the target rod lifting height is determined based on the extrapolated critical rod position, the current second rod position and the second preset height, and all the regulating rods and all the compensating rods are horizontally lifted to the first preset height. The target rod is raised to the target rod position. After the source range count rate is stable, the new second rod position and the new second source range count rate are recorded. The above steps of calculating the extrapolated critical rod position according to the previous two source range count rates to record the new second rod position and the new second source range count rate are repeated until the difference between the extrapolated critical rod position and the current average rod position is less than the preset critical difference, and the high temperature gas-cooled reactor is transitioned to the critical state or the supercritical state, thereby achieving the high temperature gas-cooled reactor in a helium atmosphere to reach the critical state or the supercritical state safely and efficiently. The operation is simple, and subsequent low-power tests can be carried out or the reactor power can be increased on this basis.

[0068] Exemplarily, transitioning a high temperature gas-cooled reactor to a critical state or a supercritical state includes:

[0069] The regulating rods and the compensating rods are sequentially raised one by one to a third preset height. During the raising process, if the growth of the neutron count rate tends to be stable or the high temperature gas-cooled reactor has a stable doubling cycle, the rod raising is stopped;

[0070] When the source range count rate reaches the preset critical value, the control rod position is adjusted to make the count rate stabilize and the high temperature gas-cooled reactor reaches a critical state.

[0071] Specifically, the third preset height may be 100 mm, that is, when the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state, the regulating rods and the compensating rods may be lifted 100 mm one by one.

[0072] When the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state, by raising the regulating rods and the compensating rods one by one to a third preset height, it is possible to avoid the situation where the high temperature gas-cooled reactor still cannot reach a critical state or a supercritical state after all regulating rods and compensating rods are raised.

[0073] For example, the preset critical value may be 1000cps, that is, when the source range count rate reaches 1000cps, the control rod position is adjusted to make the count rate tend to be stable, and the high temperature gas-cooled reactor reaches a critical state.

[0074] Exemplarily, after the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state, the method further comprises the following steps: inserting a regulating rod or a compensating rod to make the high temperature gas-cooled reactor reach a subcritical state. In this step, the average reactor temperature when the high temperature gas-cooled reactor reaches a subcritical state can also be recorded.

[0075] For example, after the high temperature gas-cooled reactor reaches a subcritical state, another regulating rod or compensating rod may be inserted to place the high temperature gas-cooled reactor in a deeper subcritical state.

[0076] In order to enable those skilled in the art to better understand the above implementation, a specific example is provided below for illustration.

[0077] A method for reaching criticality of a high temperature gas-cooled reactor in a helium atmosphere comprises the following steps:

[0078] (1) Initialization of the HTGR: The HTGR is in a helium atmosphere, reaches the initial full core height, and a 6.05 m graphite ball cushion is installed at the bottom of the core. The average reactor temperature is higher than 140 °C and lower than 150 °C. All absorber balls are located in the upper core storage tank, all safety rods are located at the preset upper limit positions, and all regulating rods and compensating rods are located at the preset lower limit positions.

[0079] (2) Lift all adjustment rods and all compensation rods horizontally to the preset rod position, i.e., the 6000mm rod position. After the source range count rate stabilizes, record the current first rod position, the first source range count rate, and the He-3 counter tube count.

[0080] (3) Lift all adjustment rods and all compensation rods horizontally to the first preset height of 200 mm. After the source range count rate stabilizes, record the current second rod position, second source range count rate, and He-3 counter tube count.

[0081] (4) Based on the previous two source range count rates and the count rates of the He-3 counter tube, the extrapolated critical rod position is calculated, and the minimum value of one-third of the difference between the extrapolated critical rod position and the current second rod position and the second preset height, i.e., 200 mm, is determined as the target rod lifting height.

[0082] (5) Lift all adjustment rods and all compensation rods horizontally to the target rod lifting height to the target rod position. After the source range count rate stabilizes, record the new second rod position, the new second source range count rate, and the new He-3 counter tube count.

[0083] (6) Repeat steps (4) to (5) until the difference between the extrapolated critical rod position and the current average rod position is less than a preset critical difference, i.e., 50 mm, and the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state.

[0084] (7) The regulating rods and the compensating rods are lifted one by one in turn to a third preset height, i.e., 100 mm. During the lifting process, if the growth of the neutron count rate tends to be stable or the high-temperature gas-cooled reactor has a stable doubling cycle, the lifting of the rods is stopped.

[0085] It should be noted that after the source range nuclear power high protection shutdown signal appears, the source range nuclear power high shutdown signal should be manually locked in time, and then the reactor nuclear power can be read through the intermediate range; if there is a He-3 counter tube, the power of the channel will be turned off when the counting rate of the He-3 counter tube is close to the upper limit of the range.

[0086] (8) When the source range count rate reaches the preset critical value, i.e., 1000 cps, the control rod position is adjusted to stabilize the count rate and the HTGR reaches a critical state. After that, an adjustment rod or a compensating rod is inserted to make the HTGR reach a subcritical state and the average reactor temperature is recorded. After that, another adjustment rod or a compensating rod is inserted to make the HTGR reach a deeper subcritical state.

[0087] Another embodiment of the present disclosure relates to a device for achieving criticality in a high temperature gas-cooled reactor under a helium atmosphere, such as Figure 2 As shown, including:

[0088] Initialization module 201 is used to initialize the high temperature gas-cooled reactor: the high temperature gas-cooled reactor is in a helium atmosphere, and reaches an initial fully loaded core height, all absorption balls are located in the upper core storage tank, all safety rods are located at a preset upper limit, and all regulating rods and compensation rods are located at a preset lower limit;

[0089] The first horizontal lifting module 202 is used to horizontally lift all the adjustment rods and all the compensation rods to a preset rod position, and after the source range count rate is stable, record the current first rod position and the first source range count rate;

[0090] The second horizontal lifting module 203 is used to horizontally lift all the adjustment rods and all the compensation rods to a first preset height, and after the source range count rate is stable, record the current second rod position and the second source range count rate;

[0091] The determination module 204 is used to calculate the extrapolated critical rod position according to the previous two source range count rates, and determine the target rod lifting height based on the extrapolated critical rod position, the current second rod position and the second preset height;

[0092] The third horizontal lifting module 205 is used to horizontally lift all the adjustment rods and all the compensation rods to the target rod lifting height to the target rod position, and after the source range count rate is stable, record the new second rod position and the new second source range count rate;

[0093] The transition module 206 is used to repeatedly trigger the determination module 204 and the third leveling module 205 until the difference between the extrapolated critical rod position and the current average rod position is less than a preset critical difference, so as to transition the high temperature gas-cooled reactor to a critical state or a supercritical state.

[0094] The specific implementation method of the device for reaching criticality in a helium atmosphere of a high-temperature gas-cooled reactor provided in the embodiment of the present disclosure can be referred to the method for reaching criticality in a helium atmosphere of a high-temperature gas-cooled reactor provided in the embodiment of the present disclosure, and will not be repeated here.

[0095] Compared with the prior art, the embodiment of the present disclosure first initializes the high temperature gas-cooled reactor through the initialization module, then all the adjustment rods and all the compensation rods are horizontally lifted to the preset rod position through the first horizontal lifting module, and after the source range count rate is stable, the current first rod position and the first source range count rate are recorded, and then all the adjustment rods and all the compensation rods are horizontally lifted to the first preset height through the second horizontal lifting module, and after the source range count rate is stable, the current second rod position and the second source range count rate are recorded, and the extrapolated critical rod position is calculated according to the previous two source range count rates through the determination module, and based on the extrapolated critical rod position, the current second rod position and the second preset Set the height, determine the target rod lifting height, lift all the adjustment rods and all the compensation rods to the target rod lifting height to the target rod position through the third lifting module, record the new second rod position and the new second source range count rate after the source range count rate is stable, and repeatedly trigger the determination module and the third lifting module through the transition module until the difference between the extrapolated critical rod position and the current average rod position is less than the preset critical difference, so as to transition the high temperature gas-cooled reactor to the critical state or the supercritical state, thereby achieving the high temperature gas-cooled reactor in a helium atmosphere to reach the critical state or the supercritical state safely and efficiently, and on this basis, carry out subsequent low-power tests or increase the reactor power.

[0096] Another embodiment of the present disclosure relates to an electronic device, such as Figure 3 As shown, including:

[0097] at least one processor 301; and,

[0098] A memory 302 is communicatively connected to at least one processor 301; wherein,

[0099] The memory 302 stores instructions that can be executed by at least one processor 301. The instructions are executed by at least one processor 301 so that the at least one processor 301 can execute the method for reaching criticality of a high temperature gas-cooled reactor in a helium atmosphere as described in the above embodiment.

[0100] Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.

[0101] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

[0102] Another embodiment of the present disclosure relates to a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for a high temperature gas-cooled reactor to reach criticality in a helium atmosphere as described in the above embodiment.

[0103] That is, those skilled in the art can understand that all or part of the steps in the method described in the above embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0104] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present disclosure.

Claims

1. A method for achieving criticality in a high temperature gas-cooled reactor under a helium atmosphere, characterized in that: The method comprises the following steps: S110, initializing the high temperature gas-cooled reactor: the high temperature gas-cooled reactor is in a helium atmosphere, and reaches an initial fully loaded core height, all absorption balls are located in the upper core storage tank, all safety rods are located at a preset upper limit, and all regulating rods and compensation rods are located at a preset lower limit; S120, lifting all the adjustment rods and all the compensation rods horizontally to the preset rod positions, and after the source range count rate is stable, recording the current first rod position and the first source range count rate; S130, lifting all the adjustment rods and all the compensation rods horizontally to a first preset height, and after the source range count rate is stable, recording the current second rod position and the second source range count rate; S140, calculating an extrapolated critical rod position according to the previous two source range count rates, and determining a target rod lifting height based on the extrapolated critical rod position, the current second rod position and the second preset height; S150, lifting all the adjustment rods and all the compensation rods horizontally to the target rod lifting height to the target rod position, and after the source range count rate is stable, recording a new second rod position and a new second source range count rate; S160, repeating step S140 and step S150 until the difference between the extrapolated critical rod position and the current average rod position is less than a preset critical difference, and transitioning the high temperature gas-cooled reactor to a critical state or a supercritical state; The step of transitioning the high temperature gas-cooled reactor to a critical state or a supercritical state comprises: The regulating rods and the compensating rods are sequentially lifted one by one to a third preset height, and during the lifting process, if the growth of the neutron count rate tends to be stable or the high temperature gas-cooled reactor has a stable doubling cycle, the lifting of the rods is stopped; When the source range count rate reaches a preset critical value, the control rod position is adjusted to make the count rate tend to be stable, and the high temperature gas-cooled reactor reaches the critical state.

2. The method according to claim 1, characterized in that The calculation of the extrapolated critical rod position according to the source range count rates of the first two times includes: The extrapolated critical rod position is calculated according to the first two source range counting rates and the counting rate of the He-3 counter tube.

3. The method according to claim 1, characterized in that The step of determining a target stick lifting height based on the extrapolated critical stick position, the current second stick position and the second preset height includes: The target stick lifting height is determined based on the difference between the extrapolated critical stick position and the current second stick position and the second preset height.

4. The method according to claim 3, characterized in that The step of determining the target stick lifting height based on the difference between the extrapolated critical stick position and the current second stick position and the second preset height includes: The minimum value between one third of the difference and the second preset height is determined as the target rod lifting height.

5. The method according to any one of claims 1 to 4, characterized in that: After the high temperature gas-cooled reactor is transitioned to a critical state or a supercritical state, the method further comprises the following steps: One of the regulating rods or the compensating rods is inserted downward to make the high temperature gas-cooled reactor reach a subcritical state.

6. The method according to any one of claims 1 to 4, characterized in that: The preset rod position is a position where no positive reactivity is introduced into the core or where the positive reactivity introduced is less than a preset threshold.

7. A device for achieving criticality in a high temperature gas-cooled reactor under a helium atmosphere, characterized in that: The device comprises: Initialization module, used to initialize the high temperature gas-cooled reactor: the high temperature gas-cooled reactor is in helium atmosphere, it reaches the initial full-load core height, all absorption balls are located in the upper core storage tank, all safety rods are located at the preset upper limit, and all regulating rods and compensation rods are located at the preset lower limit; A first horizontal lifting module, used to horizontally lift all the adjustment rods and all the compensation rods to a preset rod position, and after the source range count rate is stable, record the current first rod position and the first source range count rate; A second horizontal lifting module is used to horizontally lift all the adjustment rods and all the compensation rods to a first preset height, and after the source range count rate is stable, record the current second rod position and the second source range count rate; A determination module, used to calculate an extrapolated critical rod position according to the previous two source range count rates, and determine a target rod lifting height based on the extrapolated critical rod position, the current second rod position and a second preset height; A third horizontal lifting module is used to horizontally lift all the adjustment rods and all the compensation rods to the target rod lifting height to the target rod position, and after the source range count rate is stable, record the new second rod position and the new second source range count rate; A transition module, used to repeatedly trigger the determination module and the third leveling module until the difference between the extrapolated critical rod position and the current average rod position is less than a preset critical difference, so as to transition the high temperature gas-cooled reactor to a critical state or a supercritical state; The step of transitioning the high temperature gas-cooled reactor to a critical state or a supercritical state comprises: The regulating rods and the compensating rods are sequentially lifted one by one to a third preset height, and during the lifting process, if the growth of the neutron count rate tends to be stable or the high temperature gas-cooled reactor has a stable doubling cycle, the lifting of the rods is stopped; When the source range count rate reaches a preset critical value, the control rod position is adjusted to make the count rate tend to be stable, and the high temperature gas-cooled reactor reaches the critical state.

8. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for achieving criticality of a high temperature gas-cooled reactor in a helium atmosphere according to any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for achieving criticality of a high temperature gas-cooled reactor in a helium atmosphere according to any one of claims 1 to 6 is implemented.

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