CN114758799A - Method and device for achieving criticality under helium atmosphere of high-temperature gas cooled reactor - Google Patents
Method and device for achieving criticality under helium atmosphere of high-temperature gas cooled reactor Download PDFInfo
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- 239000007789 gas Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000001307 helium Substances 0.000 title claims abstract description 34
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 34
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000013213 extrapolation Methods 0.000 claims abstract description 23
- 230000009257 reactivity Effects 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 3
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- 230000004044 response Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
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- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
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Abstract
The invention relates to the physical field of high-temperature gas cooled reactor reactors, and provides a method and a device for achieving criticality under a helium atmosphere of a high-temperature gas cooled reactor, wherein the method comprises the following steps: initializing a high-temperature gas cooled reactor; horizontally lifting the adjusting rod and the compensating rod to a preset rod position, and recording the current source range counting rate; horizontally lifting the adjusting rod and the compensating rod by a first preset height, and recording the current source range counting rate; calculating an extrapolation critical rod position according to the counting rates of the source measuring ranges of the previous two times, and determining a target rod lifting height based on the extrapolation critical rod position, the current second rod position and a second preset height; horizontally lifting the target rod lifting height to a target rod position by the adjusting rod and the compensating rod, and recording a new second rod position and a new second source range counting rate after the source range counting rate is stable; and repeating the steps of calculating the extrapolated critical rod position and recording the new second source range counting rate until a preset condition is met, and transitioning the high-temperature gas cooled reactor to a critical or supercritical state. The present disclosure enables a high temperature gas cooled reactor to safely and efficiently reach a critical or supercritical state under a helium atmosphere.
Description
Technical Field
The disclosure relates to the technical field of high temperature gas cooled reactor physics, in particular to a method and a device for achieving criticality of a high temperature gas cooled reactor under a helium atmosphere.
Background
In the prior art, the difference between the core loading and reactivity control means of a pebble-bed high-temperature gas cooled reactor and the core loading and reactivity control means of a pressurized water reactor is large. A set of reactivity control system, namely a control rod system, is usually arranged in a graphite side reflecting layer of the high-temperature gas cooled reactor close to an active area, and meanwhile, another set of reactivity control system which has different working principles and independently exists, namely an absorption ball reactor shutdown system, is also arranged.
The control rod system is a main reactivity control system, comprises a safety rod, a compensation rod and an adjusting rod, and has the following functions: 1) the reactivity adjustment device is used for adjusting the reactivity of the operation conditions such as reactor starting, lifting power, normal power operation and the like; 2) for emergency shutdown; 3) the reactor can be brought to and maintained in a normal shutdown state using only the control rod system.
The absorption ball shutdown system is an auxiliary shutdown system which is used together with a control rod system, so that the shutdown margin of the reactor can be kept to meet the requirement in cold shutdown and maintenance shutdown.
Therefore, the high temperature gas cooled reactor is critical and the pressurized water reactor is critical. However, there is a lack in the prior art of how to make the reactor critical in a helium atmosphere by changing the state of the above-mentioned high temperature gas cooled reactor reactivity control system.
Disclosure of Invention
The present disclosure is directed to at least one of the problems of the prior art, and provides a method and an apparatus for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor.
In one aspect of the present disclosure, a method for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor is provided, which includes the following steps:
s110, initializing a high-temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, all the absorption spheres are located in a sphere storage tank at the upper part of the reactor core, all the safety rods are located at the preset upper limit, and all the adjusting rods and the compensating rods are located at the preset lower limit;
s120, horizontally lifting all the adjusting rods and all the compensating rods to a preset rod position, and recording a current first rod position and a current first source range counting rate after the source range counting rate is stable;
s130, horizontally lifting all the adjusting rods and all the compensating rods to a first preset height, and recording the current second rod position and the current second source range counting rate after the source range counting rate is stable;
s140, calculating an extrapolation critical rod position according to the source range counting rates of the previous two times, and determining a target rod lifting height based on the extrapolation critical rod position, the current second rod position and a second preset height;
s150, lifting the height of the target rod to a target rod position by all the adjusting rods and all the compensating rods, and recording a new second rod position and a new second source range counting rate after the source range counting rate is stable;
and S160, repeating the step S140 and the step S150 until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, and transitioning the high-temperature gas cooled reactor to a critical state or a supercritical state.
Optionally, calculating an extrapolated critical rod position according to the counting rates of the first two source ranges, including:
and calculating the extrapolation critical rod position according to the counting rate of the source measuring range of the previous two times and the counting rate of the He-3 counting tube.
Optionally, determining a target rod lifting height based on the extrapolated critical rod position, the current second rod position, and the second preset height, includes:
and determining the target rod lifting height based on the difference value between the extrapolated critical rod position and the current second rod position and a second preset height.
Optionally, determining a target rod lifting height based on a difference between the extrapolated critical rod position and the current second rod position and a second preset height, including:
and determining the minimum value of one third of the difference value and the second preset height as the target rod lifting height.
Optionally, the step of transitioning the high temperature gas cooled reactor to a critical state or a supercritical state includes:
sequentially lifting the adjusting rods and the compensating rods one by one to a third preset height, and stopping lifting the rods if the increase of the neutron counting rate tends to be stable or the high-temperature gas cooled reactor has a stable multiplication period in the lifting process;
when the counting rate of the source range reaches a preset critical value, the position of the control rod is adjusted to enable the counting rate to tend to be stable, and the high-temperature gas cooled reactor reaches a critical state.
Optionally, after the high temperature gas cooled reactor is transitioned to the critical state or the supercritical state, the method further includes the following steps:
and inserting an adjusting rod or a compensating rod to make the high-temperature gas-cooled reactor reach a subcritical state.
Optionally, the preset rod position is a position where the positive reactivity is not introduced into the reactor core or is less than a preset threshold.
In another aspect of the present disclosure, there is provided a device for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor, including:
the initialization module is used for initializing the high-temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, all the absorption spheres are located in a sphere storage tank at the upper part of the reactor core, all the safety rods are located at the preset upper limit, and all the adjusting rods and the compensating rods are located at the preset lower limit;
the first lifting module is used for lifting all the adjusting rods and all the compensating rods to a preset rod position, and recording the current first rod position and the current first source range counting rate after the source range counting rate is stable;
the second horizontal lifting module is used for horizontally lifting all the adjusting rods and all the compensating rods by a first preset height, and recording the current second rod position and the current second source range counting rate after the source range counting rate is stable;
the determining module is used for calculating an extrapolation critical rod position according to the source range counting rates of the previous two times, and determining a target rod lifting height based on the extrapolation critical rod position, the current second rod position and a second preset height;
the third lifting module is used for lifting the height value of the target lifting rod to the target rod position by all the adjusting rods and all the compensating rods, and recording a new second rod position and a new second source range counting rate after the source range counting rate is stable;
and the transition module is used for repeatedly triggering the determination module and the third lifting module until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, and transitioning the high-temperature gas cooled reactor to a critical state or a supercritical state.
In another aspect of the present disclosure, there is provided an electronic device including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor as described above.
In another aspect of the present disclosure, a computer-readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the method for achieving criticality under helium atmosphere in a high temperature gas cooled reactor described above.
The disclosure is relative to the prior art by first initializing the high temperature gas cooled reactor, then leveling all conditioning rods and all compensation rods to a preset rod position, after the source range count rate has stabilized, recording a current first rod position and a first source range count rate, then leveling all conditioning rods and all compensation rods to a first preset height, after the source range count rate has stabilized, recording a current second rod position and a second source range count rate, calculating an extrapolated critical rod position from the previous source range count rate, and determining a target rod height based on the extrapolated critical rod position, the current second rod position, and the second preset height, leveling all conditioning rods and all compensation rods to a target rod position, after the source range count rate has stabilized, recording a new second rod position and a new second source range count rate, repeating the steps of calculating the extrapolated critical rod position from the previous source range count rate to recording a new second rod position and a new second source range count rate, and transitioning the high-temperature gas-cooled reactor to a critical state or a supercritical state until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, so that the high-temperature gas-cooled reactor safely and efficiently reaches the critical state or the supercritical state under the helium atmosphere, and then carrying out a subsequent low-power test or improving the reactor power on the basis.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flowchart illustrating a method for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an apparatus for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an electronic device according to another embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the disclosure, numerous technical details are set forth in order to provide a better understanding of the disclosure. However, the technical solution claimed in the present disclosure can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and no limitation should be made to specific implementations of the present disclosure, and the embodiments may be mutually incorporated and referred to without contradiction.
One embodiment of the present disclosure relates to a method for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor, the flow of which is shown in fig. 1, and the method comprises the following steps:
s110, initializing a high-temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, all the absorption spheres are located in the upper sphere storage tank of the reactor core, all the safety rods are located at the preset upper limit, and all the adjusting rods and the compensating rods are located at the preset lower limit.
Specifically, in the step, a graphite sphere cushion layer of 6.05m can be arranged at the bottom of the reactor core, and the high-dimensional gas cooled reactor reaches the height of the initially fully loaded reactor core.
The temperature of the reactor core needs to ensure that the high-temperature gas cooled reactor has certain subcritical degree when all the absorption spheres are positioned in the sphere storage tank at the upper part of the reactor core and all the safety rods can be lifted to the preset upper limit. For example, the average reactor temperature may be set to be higher than 150 ℃, so as to ensure that all the absorption spheres are located in the sphere storage tank at the upper part of the reactor core, and when all the safety rods can be lifted to the preset upper limit, the high temperature gas cooled reactor has a certain subcritical degree.
And S120, lifting all the adjusting rods and all the compensating rods to a preset rod position, and recording the current first rod position and the current first source range counting rate after the source range counting rate is stable.
Specifically, all the adjusting rods and all the compensating rods can be horizontally lifted to the preset rod positions at one time according to the reactor core loading and control rod theoretical value curve. When He-3 count tubes are present, He-3 count tube counts can also be recorded after the source range count rate has stabilized.
For example, the predetermined rod position may be a position where no or less than a predetermined threshold positive reactivity is introduced into the core, for example, the predetermined rod position may be a rod position of 6000 mm.
By setting the preset rod position to be a position where the positive response is not introduced into the reactor core or the positive response is less than the preset threshold value, the problem of efficiency reduction caused by multiple rod lifting in a non-value area when a graphite sphere cushion layer is arranged at the lower part of the reactor core can be avoided.
And S130, lifting all the adjusting rods and all the compensating rods to a first preset height, and recording the current second rod position and the current second source range counting rate after the source range counting rate is stable.
For example, the first preset height may be 200 mm. When the He-3 counting tube is present, the step can also record the He-3 counting tube count after the source range counting rate is stable.
S140, calculating an extrapolation critical rod position according to the source range counting rates of the previous two times, and determining a target rod lifting height based on the extrapolation critical rod position, the current second rod position and a second preset height.
Specifically, in this step, the extrapolation critical rod position may be calculated according to the previous two source range count rates, that is, the count rates of the two source range channels including the first source range count rate and the second source range count rate. For example, the extrapolated critical rod position can be calculated from the previous two source range count rates using a similar triangle method.
Illustratively, calculating the extrapolated critical rod position from the first two source-range count rates when He-3 count tubes are present may further comprise: and calculating the extrapolation critical rod position according to the counting rate of the source measuring range of the previous two times and the counting rate of the He-3 counting tube. That is, when the He-3 counting tube exists, the step can also calculate the extrapolation critical rod position according to the counting rate of the source measuring range of the previous two times and the counting rate of the He-3 counting tube.
It should be noted that, in this step, a specific method for calculating the extrapolated critical rod position according to the previous two times of source range counting rates is not limited, as long as the extrapolated critical rod position can be calculated according to the previous two times of source range counting rates, or when a He-3 counting tube is present, the extrapolated critical rod position can be calculated according to the previous two times of source range counting rates and the counting rate of the He-3 counting tube.
Illustratively, determining the target rod lifting height based on the extrapolated critical rod position, the current second rod position, and the second preset height includes:
and determining the target rod lifting height based on the difference value between the extrapolated critical rod position and the current second rod position and a second preset height.
Specifically, the step may compare a part of the difference between the extrapolated critical rod position and the current second rod position with a second preset height, and use the minimum value of the two as the target rod lifting height. The second preset height may be 200 mm.
Preferably, the determining the target rod lifting height based on the difference between the extrapolated critical rod position and the current second rod position and the second preset height comprises: and determining the minimum value of one third of the difference value and the second preset height as the target rod lifting height. That is, the present step may extrapolate a minimum value of one third of a difference between the critical rod position and the current second rod position and the second preset height as the target rod-lifting height, thereby determining the target rod position for the next rod-lifting according to the target rod-lifting height.
By determining the minimum value between one third of the difference value and the second preset height as the target rod lifting height, unsafe factors caused by excessive reactivity when the rod lifting is extrapolated in a nonlinear region can be avoided, and the problem of time consumption increase caused by excessive extrapolation times can be avoided.
S150, lifting the height of the target rod to a target rod position by all the adjusting rods and all the compensating rods, and recording a new second rod position and a new second source range counting rate after the source range counting rate is stable.
Specifically, when the He-3 counting tube exists, the new He-3 counting tube count can be recorded after the source range counting rate is stable.
And S160, repeating the step S140 and the step S150 until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, and transitioning the high-temperature gas cooled reactor to a critical state or a supercritical state.
Specifically, the extrapolated critical rod position may be obtained by calculation according to the previous two source-range counting rates, or may be obtained by calculation according to the previous two source-range counting rates and the counting rate of the He-3 counting tube, which is not limited in this embodiment. The preset critical difference value may 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 transited to the critical state or the 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 a new extrapolated critical rod position and a new current average rod position are obtained, which are different by less than 50 mm.
Compared with the prior art, the method includes the steps of initializing a high-temperature gas cooled reactor, lifting all adjusting rods and all compensating rods to preset rod positions, recording current first rod positions and first source range counting rates after source range counting rates are stable, lifting all adjusting rods and all compensating rods to first preset heights, recording current second rod positions and second source range counting rates after source range counting rates are stable, calculating extrapolated critical rod positions according to previous source range counting rates, determining target rod lifting heights based on the extrapolated critical rod positions, current second rod positions and second preset heights, lifting all adjusting rods and all compensating rods to target rod positions, recording new second rod positions and new second source range counting rates after source range counting rates are stable, and repeating the steps of calculating the extrapolated critical rod positions according to previous source range counting rates to new second rod positions and new second source range counting rates And transitioning the high-temperature gas-cooled reactor to a critical state or a supercritical state until the difference between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference, so that the high-temperature gas-cooled reactor can safely and efficiently reach the critical state or the supercritical state under the helium atmosphere, the operation is simple, and a subsequent low-power test can be carried out or the reactor power can be improved on the basis.
Illustratively, transitioning the high temperature gas cooled reactor to a critical or supercritical state includes:
sequentially lifting the adjusting rods and the compensating rods one by one to a third preset height, and stopping lifting the rods if the increase of the neutron counting rate tends to be stable or the high-temperature gas cooled reactor has a stable multiplication period in the lifting process;
when the counting rate of the source range reaches a preset critical value, the position of the control rod is adjusted to enable the counting rate to tend to be stable, and the high-temperature gas cooled reactor reaches a critical state.
Specifically, the third preset height may be 100mm, that is, when the high temperature gas cooled reactor is transited to the critical state or the supercritical state, the adjusting rod and the compensating rod may be sequentially lifted 100mm one by one.
When the high-temperature gas-cooled reactor is transited to the critical state or the supercritical state, the adjusting rods and the compensating rods are sequentially lifted one by one to a third preset height, so that the situation that the high-temperature gas-cooled reactor still cannot reach the critical state or the supercritical state after all the adjusting rods and the compensating rods are lifted flatly can be avoided.
For example, the predetermined threshold may be 1000cps, that is, when the source range count rate reaches 1000cps, the position of the control rod is adjusted to stabilize the count rate, and the high temperature gas cooled reactor reaches a critical state.
Illustratively, after the high temperature gas cooled reactor is transitioned to the critical state or the supercritical state, the method further comprises the steps of: and inserting an adjusting 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 the subcritical state may also be recorded.
For example, after the high temperature gas cooled reactor reaches the subcritical state, an adjusting rod or a compensating rod may be further inserted to enable the high temperature gas cooled reactor to be in a deeper subcritical state.
In order to enable those skilled in the art to better understand the above-described embodiments, a specific example is described below.
A method for achieving criticality under a helium atmosphere of a high-temperature gas cooled reactor comprises the following steps:
(1) initializing a high-temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, a 6.05m graphite nodule cushion layer is arranged at the bottom of the reactor core, the average temperature of the reactor is higher than 140 ℃ and lower than 150 ℃, all absorption nodules are located in a sphere storage tank at the upper part of the reactor core, all safety rods are located at the preset upper limit, and all adjusting rods and all compensating rods are located at the preset lower limit.
(2) And (4) horizontally lifting all the adjusting rods and all the compensating rods to preset rod positions, namely 6000mm rod positions, and recording the current first rod position, the first source range counting rate and He-3 counting tube counting after the source range counting rate is stable.
(3) And horizontally lifting all the adjusting rods and all the compensating rods by a first preset height, namely 200mm, and recording the current second rod position, the second source range counting rate and the He-3 counting tube counting after the source range counting rate is stable.
(4) And calculating an extrapolation critical rod position according to the counting rates of the source range and the He-3 counting tube in the previous two times, and determining a minimum value in one third of the difference value between the extrapolation critical rod position and the current second rod position and a second preset height, namely 200mm as a target rod lifting height.
(5) And horizontally lifting the target rod lifting height to a target rod position by all the adjusting rods and all the compensating rods, and recording a new second rod position, a new second source range counting rate and a new He-3 counting tube count after the source range counting rate is stable.
(6) And (5) repeating the steps (4) and (5) until the difference value between the extrapolated critical rod position and the current average rod position is smaller than the preset critical difference value, namely 50mm, and transitioning the high-temperature gas cooled reactor to a critical state or a supercritical state.
(7) And sequentially lifting the adjusting rods and the compensating rods one by one to a third preset height (100 mm), and stopping lifting the rods if the increase of the neutron counting rate tends to be stable or a stable multiplication period of the high-temperature gas cooled reactor occurs in the lifting process.
It is noted that after a locked source range nuclear power high protection shutdown signal appears, the locked source range nuclear power high shutdown signal is manually locked in time, and then the reactor nuclear power is read through the middle range; if the He-3 counting tube exists, the channel power supply is turned off when the counting rate of the He-3 counting tube approaches the upper limit of the measuring range.
(8) When the counting rate of the source range reaches a preset critical value, namely 1000cps, the position of the control rod is adjusted to ensure that the counting rate tends to be stable, and the high-temperature gas cooled reactor reaches a critical state. And inserting an adjusting rod or a compensating rod to make the high-temperature gas-cooled reactor reach a subcritical state, and recording the average temperature of the reactor. And then, inserting an adjusting rod or a compensating rod to enable the high-temperature gas cooled reactor to be in a deeper subcritical state.
Another embodiment of the present disclosure relates to an apparatus for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor, as shown in fig. 2, comprising:
an initialization module 201, configured to initialize the high temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, all the absorption spheres are located in a sphere storage tank at the upper part of the reactor core, all the safety rods are located at the preset upper limit, and all the adjusting rods and the compensating rods are located at the preset lower limit;
the first lifting module 202 is used for lifting all the adjusting rods and all the compensating rods to a preset rod position, and recording the current first rod position and the current first source range counting rate after the source range counting rate is stable;
the second lifting module 203 is used for lifting all the adjusting rods and all the compensating rods by a first preset height, and recording the current second rod position and the current second source range counting rate after the source range counting rate is stable;
the determining module 204 is configured to calculate an extrapolated critical rod position according to the previous two source range counting rates, and determine a target rod lifting height based on the extrapolated critical rod position, a current second rod position, and a second preset height;
the third lifting module 205 is used for lifting the target lifting rod height to the target rod position by all the adjusting rods and all the compensating rods, and recording a new second rod position and a new second source range counting rate after the source range counting rate is stable;
a transition module 206, configured to repeatedly trigger the determining module 204 and the third lifting module 205 until a difference between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference, and transition the high temperature gas cooled reactor to a critical state or a supercritical state.
The specific implementation method of the device for achieving criticality in the helium atmosphere of the high temperature gas cooled reactor provided by the embodiment of the present disclosure may refer to the method for achieving criticality in the helium atmosphere of the high temperature gas cooled reactor provided by the embodiment of the present disclosure, and details are not repeated here.
Compared with the prior art, the high-temperature gas cooled reactor is initialized through the initialization module, all adjusting rods and all compensating rods are lifted to the preset rod positions through the first lifting module, the current first rod positions and the first source range counting rate are recorded after the source range counting rate is stabilized, all adjusting rods and all compensating rods are lifted to the first preset height through the second lifting module, the current second rod positions and the second source range counting rate are recorded after the source range counting rate is stabilized, the extrapolation critical rod positions are calculated through the determination module according to the previous two times of source range counting rates, the target lifting rod height is determined based on the extrapolation critical rod positions, the current second rod positions and the second preset height, all adjusting rods and all compensating rods are lifted to the target lifting rod positions through the third lifting module, after the source range counting rate is stabilized, and recording a new second rod position and a new second source range counting rate, repeatedly triggering the determination module and the third lifting module through the transition module until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, and transitioning the high-temperature gas-cooled reactor to a critical state or a supercritical state, so that the high-temperature gas-cooled reactor safely and efficiently reaches the critical state or the supercritical state under a helium atmosphere, and developing a subsequent low-power test or improving the reactor power on the basis.
Another embodiment of the present disclosure relates to an electronic device, as shown in fig. 3, including:
at least one processor 301; and the number of the first and second groups,
a memory 302 communicatively coupled to the at least one processor 301; wherein,
the memory 302 stores instructions executable by the at least one processor 301, and the instructions are executable by the at least one processor 301 to enable the at least one processor 301 to perform the method for achieving criticality under helium atmosphere in a high temperature gas cooled reactor according to the above embodiments.
Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting together one or more of the various circuits of the processor and the memory. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium through an antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
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 achieving criticality in a helium atmosphere of a high temperature gas cooled reactor according to the above embodiments.
That is, as can be understood by those skilled in the art, all or part of the steps in the method according to the foregoing embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps in the method according to each embodiment of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific to implementations of the present disclosure, and that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure in practice.
Claims (10)
1. A method for achieving criticality under a helium atmosphere of a high-temperature gas cooled reactor is characterized by comprising the following steps:
s110, initializing a high-temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, all the absorption spheres are located in a sphere storage tank at the upper part of the reactor core, all the safety rods are located at the preset upper limit, and all the adjusting rods and the compensating rods are located at the preset lower limit;
s120, horizontally lifting all the adjusting rods and all the compensating rods to a preset rod position, and recording a current first rod position and a current first source range counting rate after the source range counting rate is stable;
s130, horizontally lifting all the adjusting rods and all the compensating rods by a first preset height, and recording the current second rod position and the current second source range counting rate after the source range counting rate is stable;
s140, calculating an extrapolation critical rod position according to the source range counting rates of the previous two times, and determining a target rod lifting height based on the extrapolation critical rod position, the current second rod position and a second preset height;
s150, lifting the heights of the target lifting rods to target rod positions by the aid of all the adjusting rods and all the compensating rods, and recording a new second rod position and a new second source range counting rate after the source range counting rate is stable;
and S160, repeating the step S140 and the step S150 until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, and transitioning the high-temperature gas cooled reactor to a critical state or a supercritical state.
2. The method of claim 1, wherein calculating extrapolated critical rod positions from the first two source range count rates comprises:
and calculating the extrapolation critical rod position according to the counting rates of the first two times of source measuring ranges and the counting rate of the He-3 counting tube.
3. The method of claim 1, wherein determining a target rod lift height based on the extrapolated critical rod position, the current second rod position, and a second preset height comprises:
and determining the target rod lifting height based on the difference value between the extrapolation critical rod position and the current second rod position and the second preset height.
4. The method of claim 3, wherein said determining the target lifter height based on the difference between the extrapolated critical rod position and the current second rod position and the second preset height comprises:
and determining the minimum value of one third of the difference value and the second preset height as the target rod lifting height.
5. The method of any one of claims 1 to 4, wherein the transitioning of the high temperature gas cooled reactor to a critical state or a supercritical state comprises:
sequentially lifting the adjusting rods and the compensating rods one by one to a third preset height, and stopping lifting the rods if the increase of the neutron counting rate tends to be stable or the high-temperature gas cooled reactor has a stable multiplication period in the lifting process;
and when the counting rate of the source range reaches a preset critical value, adjusting the position of the control rod to enable the counting rate to tend to be stable, and enabling the high-temperature gas cooled reactor to reach the critical state.
6. The method according to any one of claims 1 to 4, wherein after the transition of the high temperature gas cooled reactor to the critical state or the supercritical state, the method further comprises the steps of:
and inserting one adjusting rod or one compensating rod downwards to enable the high-temperature gas-cooled reactor to reach a subcritical state.
7. The method of any one of claims 1 to 4, wherein the predetermined rod position is a position that does not introduce a positive reactivity into the core or introduces a positive reactivity that is less than a predetermined threshold.
8. An apparatus for achieving criticality under a helium atmosphere of a high temperature gas cooled reactor, the apparatus comprising:
the initialization module is used for initializing the high-temperature gas cooled reactor: the high-temperature gas cooled reactor is in helium atmosphere, the high-temperature gas cooled reactor reaches the initial full-loaded reactor core height, all the absorption spheres are located in a sphere storage tank at the upper part of the reactor core, all the safety rods are located at the preset upper limit, and all the adjusting rods and the compensating rods are located at the preset lower limit;
the first lifting module is used for lifting all the adjusting rods and all the compensating rods to a preset rod position, and recording the current first rod position and the current first source range counting rate after the source range counting rate is stable;
the second horizontal lifting module is used for horizontally lifting all the adjusting rods and all the compensating rods by a first preset height, and recording the current second rod position and the current second source range counting rate after the source range counting rate is stable;
the determining module is used for calculating an extrapolation critical rod position according to the counting rates of the source measuring ranges of the previous two times, and determining a target rod lifting height based on the extrapolation critical rod position, the current second rod position and a second preset height;
the third lifting module is used for lifting the heights of the target lifting rods to target rod positions by the aid of all the adjusting rods and all the compensating rods, and recording new second rod positions and new second source range counting rates after the source range counting rates are stable;
and the transition module is used for repeatedly triggering the determination module and the third lifting module until the difference value between the extrapolated critical rod position and the current average rod position is smaller than a preset critical difference value, and transitioning the high-temperature gas cooled reactor to a critical state or a supercritical state.
9. An electronic device, comprising:
at least one processor; and (c) a second step of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of high temperature gas cooled reactor helium atmosphere criticizing according to any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the method for achieving criticality in a helium atmosphere of a high temperature gas cooled reactor according to any one of claims 1 to 7.
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| CN202210420493.9A CN114758799A (en) | 2022-04-21 | 2022-04-21 | Method and device for achieving criticality under helium atmosphere of high-temperature gas cooled reactor |
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| CN202210420493.9A CN114758799A (en) | 2022-04-21 | 2022-04-21 | Method and device for achieving criticality under helium atmosphere of high-temperature gas cooled reactor |
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