Safety analysis method and system for high temperature gas cooled reactor isotope irradiation production

Abstract

The application provides a safety analysis method and system for isotope irradiation production of a high-temperature gas-cooled reactor, and the method comprises the following steps: based on a prepared target irradiation scheme, a reactor core model of a pebble bed high-temperature gas-cooled reactor and a target model of a selected target type are established; the reactor core state under multiple working conditions is calculated based on the reactor core model and the target model, and reactor core key parameters are obtained; it is judged whether the reactor core key parameters belong to a safety range, in the case that the reactor core key parameters belong to the safety range, accident development sequence calculation is carried out based on the reactor core key parameters, and simulated accident results are obtained; it is judged whether the simulated accident results are enveloped by safety accidents in a final safety analysis report of the high-temperature gas-cooled reactor, in the case that the simulated accident results are enveloped by the safety accidents in the final safety analysis report of the high-temperature gas-cooled reactor, safety analysis results for isotope irradiation production of the high-temperature gas-cooled reactor are obtained, and how to carry out physical thermal safety analysis for isotope irradiation production of the pebble bed high-temperature gas-cooled reactor is clarified.

Description

Technical Field

[0001] This application relates to the field of safety analysis technology for radioactive isotope production by reactor irradiation, and in particular to a safety analysis method and system for isotope irradiation production in high-temperature gas-cooled reactors. Background Technology

[0002] The pebble bed type high-temperature gas-cooled reactor uses spherical fuel elements, such as Figure 1 As shown, the hemisphere after the fuel sphere is cut open includes an outer fuel-free region 11 and an inner fuel region 12. The fuel region 12 is covered with multiple fuel particles, which, from the outside to the inside, include an outer dense P... y C layer 13, SiC layer 14, internal dense P y C layer 15, loose P y C-layer 16 and UO2 core; the core structure of a pebble bed type high-temperature gas-cooled reactor can be simply described as a cylindrical pebble bed in the middle of the core, composed of randomly stacked spherical fuel elements, surrounded by graphite internals, carbon internals, metal internals, and a pressure vessel, such as... Figure 2 As shown, the graphite reactor internals include a top reflector layer 21, a side reflector layer 22, and a bottom reflector layer 23. Within the side reflector layer 22, control rod channels 31, absorption sphere channels 32, cold helium gas channels 33, neutron source channels 34, and physical activation device channels 35 are arranged, such as... Figure 3 As shown.

[0003] During the initial criticality of a pebble bed high-temperature gas-cooled reactor, the neutron source channels and the physics start-up device channels (both with the same structure and distribution circle diameter) are filled with neutron sources and neutron counters for physics start-up. During operation after reactor criticality, both the neutron sources and neutron counters for physics start-up are removed from the side reflector, meaning the corresponding neutron source channels and physics start-up device channels are empty.

[0004] According to reactor physics calculations, the thermal neutron flux in the neutron source channels and the physics start-up device channels is considerable, comparable to the thermal neutron flux within the reactor core. Figure 4 As shown. Therefore, the two types of channels mentioned above can be modified for isotope production; for newly built pebble bed high-temperature gas-cooled reactors, isotope production can be considered in the side reflector layer during the design phase. In this way, isotope production can generate more than 100 million yuan in new revenue for pebble bed high-temperature gas-cooled reactor nuclear power plants annually, greatly improving the economic efficiency of nuclear power plants.

[0005] The irradiation target of the isotope is a neutron absorber, and the physical and thermal state of the reactor will change during the process of loading, fixing and removing the irradiation channel, which may affect the safe operation of the reactor. Therefore, the physical and thermal safety analysis and demonstration in the isotope production process is an essential and important link. Since the pebble bed high temperature gas cooled reactor is a new type of reactor, there is no precedent for using such a reactor to carry out isotope irradiation production, and there is no safety analysis method for isotope irradiation production of the pebble bed high temperature gas cooled reactor. SUMMARY

[0006] The present application aims to at least partially solve one of the technical problems in the related art.

[0007] To this end, a first object of the present application is to provide a safety analysis method for isotope irradiation production of a high temperature gas cooled reactor, to realize the safety analysis of isotope irradiation production of a high temperature gas cooled reactor, and solve the problem of lack of physical and thermal safety analysis and demonstration method in the isotope production process in the related art.

[0008] A second object of the present application is to provide a safety analysis system for isotope irradiation production of a high temperature gas cooled reactor.

[0009] A third object of the present application is to provide an electronic device.

[0010] A fourth object of the present application is to provide a computer readable storage medium.

[0011] A fifth object of the present application is to provide a computer program product.

[0012] To achieve the above objects, a safety analysis method for isotope irradiation production of a high temperature gas cooled reactor is provided according to a first aspect of the present application, comprising:

[0013] Based on the developed target irradiation scheme, a core model of the pebble bed high temperature gas cooled reactor and a target model of the selected target type are established;

[0014] Based on the core model and the target model, the core state under multiple working conditions is calculated to obtain core key parameters;

[0015] It is judged whether the core key parameters belong to a safe range, and in the case that the core key parameters belong to the safe range, an accident development sequence calculation is performed based on the core key parameters to obtain a simulated accident result;

[0016] It is judged whether the simulated accident result is enveloped by a safety accident in the final safety analysis report of the high temperature gas cooled reactor, and in the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor, a safety analysis result for isotope irradiation production of the high temperature gas cooled reactor is obtained.

[0017] In some implementations, the method further comprises:

[0018] revising the target irradiation scheme if the core key parameters are not within the safety range.

[0019] In some implementations, the safety analysis result of the HTGR isotope irradiation production is obtained based on whether the simulated accident result is enveloped by a safety accident in a final safety analysis report of the HTGR; including:

[0020] In a case where the simulated accident result is enveloped by a safety accident in a final safety analysis report of the HTGR, it is determined that the target irradiation scheme meets the safety requirements of the reactor.

[0021] In some implementations, the safety analysis result of the HTGR isotope irradiation production is obtained based on whether the simulated accident result is enveloped by a safety accident in a final safety analysis report of the HTGR; further comprising:

[0022] In a case where the simulated accident result is not enveloped by a safety accident in a final safety analysis report of the HTGR, the target irradiation scheme is revised.

[0023] In some implementations, the core model of the HTGR and the target model of the selected target type are established, including:

[0024] The core model of the HTGR and the target model of the selected target type are established by using HTGR physical and thermal calculation software and Monte Carlo software.

[0025] In some implementations, the accident development sequence calculation is performed based on the core key parameters to obtain a simulated accident result; including:

[0026] The core key parameters are input into an accident analysis program to perform accident development sequence calculation to obtain a simulated accident result.

[0027] In some implementations, the target irradiation scheme is revised, including:

[0028] The target loading amount in the target irradiation scheme is adjusted and the target structure in the target irradiation scheme is changed.

[0029] In some implementations, the multiple working conditions include a full-power working condition, a low-power working condition, and a subcritical working condition, and the core key parameters include a core power distribution, a temperature distribution, and a gas pressure.

[0030] In some implementations, the selection of the target type is based on the neutron absorption characteristics of the target material.

[0031] To achieve the above object, the second aspect of the present application proposes a safety analysis system for isotope irradiation production of a high-temperature gas-cooled reactor, comprising:

[0032] A model establishing module is configured to establish a core model of the high-temperature gas-cooled reactor and a target model of a selected target type based on a formulated target irradiation scheme.

[0033] A state calculating module is configured to calculate core states under multiple working conditions based on the core model and the target model, and obtain core key parameters.

[0034] An accident simulating module is configured to determine whether the core key parameters belong to a safety range, and perform accident development sequence calculation based on the core key parameters to obtain a simulated accident result in a case where the core key parameters belong to the safety range.

[0035] An accident comparing module is configured to determine whether the simulated accident result is enveloped by a safety accident in a final safety analysis report of the high-temperature gas-cooled reactor, and obtain a safety analysis result for isotope irradiation production of the high-temperature gas-cooled reactor in a case where the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor.

[0036] In some implementations, the system comprises a scheme adjusting module configured to:

[0037] reformulate the target irradiation scheme in a case where the core key parameters do not belong to the safety range.

[0038] In some implementations, the accident comparing module is specifically configured to:

[0039] determine that the target irradiation scheme meets safety requirements of the reactor in a case where the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor.

[0040] In some implementations, the scheme adjusting module is further configured to:

[0041] reformulate the target irradiation scheme in a case where the simulated accident result is not enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor.

[0042] In some implementations, the model establishing module is specifically configured to:

[0043] establish the core model of the high-temperature gas-cooled reactor and the target model of the selected target type by using a physical thermal calculation software and a Monte Carlo software of the high-temperature gas-cooled reactor.

[0044] In some implementations, the accident simulation module, when performing the accident progression sequence calculation based on the core key parameters to obtain the simulated accident result, is configured to:

[0045] input the core key parameters into an accident analysis program to perform the accident progression sequence calculation to obtain the simulated accident result.

[0046] In some implementations, the scheme adjustment module, when reestablishing the target irradiation scheme, is configured to:

[0047] adjust the target loading amount in the target irradiation scheme and change the target structure in the target irradiation scheme.

[0048] In some implementations, the multiple working conditions include a full-power working condition, a low-power working condition, and a subcritical working condition, and the core key parameters include a core power distribution, a temperature distribution, and a gas pressure.

[0049] In some implementations, the selection of the target type is based on a neutron absorption characteristic of a target material.

[0050] To achieve the above object, the third aspect of the present application provides an electronic device, comprising: a processor, and a memory connected with the processor in communication; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory to implement the method of the first aspect.

[0051] To achieve the above object, the fourth aspect of the present application provides a computer readable storage medium, the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the method of the first aspect.

[0052] To achieve the above object, the fifth aspect of the present application provides a computer program product, comprising a computer program, which is executed by a processor to implement the method of the first aspect.

[0053] The high-temperature gas-cooled reactor isotope irradiation production safety analysis method, device, electronic equipment and storage medium provided by the present application are based on the established target irradiation scheme of the isotope, construct a core model and a target model of the pebble bed high-temperature gas-cooled reactor, calculate the core state under multiple working conditions based on the model, and perform safety evaluation and accident simulation of the target irradiation scheme based on the calculation result. Finally, by comparing the final safety analysis report of the reactor, the physical and thermal safety analysis demonstration of the present application is completed. It is clear how to carry out the physical and thermal safety analysis of the isotope irradiation production of the pebble bed high-temperature gas-cooled reactor, which provides reference for subsequent risk determination, program selection, model establishment, safety evaluation, countermeasure formulation and other work related to the physical and thermal safety analysis demonstration of the isotope production of the high-temperature reactor.

[0054] Additional aspects and advantages of the present application will be apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example, various embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0055] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0056] Figure 1 A schematic diagram of a fuel element structure of a pebble bed high temperature gas cooled reactor according to an example of the present application;

[0057] Figure 2 A schematic diagram of a core structure of a pebble bed high temperature gas cooled reactor according to an example of the present application;

[0058] Figure 3 A schematic diagram of a side reflector channel structure of a pebble bed high temperature gas cooled reactor according to an example of the present application;

[0059] Figure 4 A thermal neutron flux distribution diagram of a pebble bed high temperature gas cooled reactor according to an example of the present application;

[0060] Figure 5 A flowchart of a safety analysis method for isotope irradiation production of a high temperature gas cooled reactor according to an example of the present application;

[0061] Figure 6 A block diagram of a safety analysis system for isotope irradiation production of a high temperature gas cooled reactor according to an example of the present application;

[0062] Figure 7 A block diagram of an electronic device according to an example of the present application. DETAILED DESCRIPTION

[0063] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference numerals, and the embodiments described below are examples for explaining the present application and are not intended to be limiting to the present application.

[0064] A safety analysis method, device and equipment for isotope irradiation production of a high temperature gas cooled reactor according to an example of the present application are described below with reference to the accompanying drawings.

[0065] Figure 5 A flowchart of a safety analysis method for isotope irradiation production of a high temperature gas cooled reactor according to an example of the present application.

[0066] It should be noted that the execution subject of the safety analysis method for the high-temperature gas-cooled reactor isotope irradiation production of the embodiment of the application is the safety analysis system for the high-temperature gas-cooled reactor isotope irradiation production of the embodiment of the application, which can be configured in an electronic device to enable the electronic device to perform the safety analysis function of the high-temperature gas-cooled reactor isotope irradiation production.

[0067] As shown in the high-temperature gas-cooled reactor isotope irradiation production safety analysis method, Figure 5 the method comprises the following steps:

[0068] Step S101, based on the formulated target irradiation scheme, a core model of the pebble bed high-temperature gas-cooled reactor and a target model of the selected target type are established.

[0069] It should be noted that when the target irradiation scheme is formulated, the target type needs to be selected.

[0070] In some embodiments, the selection of the target type is based on the neutron absorption characteristics of the target material.

[0071] For example, in the design stage of the target irradiation scheme of the pebble bed high-temperature gas-cooled reactor isotope (not a complete isotope, but a plurality of isotope options), according to the neutron absorption characteristics of different target materials, suitable targets (for example, targets with the largest neutron absorption cross section and the smallest targets) are selected for analysis, so that the analysis results can envelope various possible irradiation targets, thereby selecting suitable targets.

[0072] In some embodiments, the method of establishing the core model of the pebble bed high-temperature gas-cooled reactor and the target model of the selected target type comprises: using the pebble bed high-temperature gas-cooled reactor physical and thermal calculation software and the Monte Carlo software to establish the core model of the pebble bed high-temperature gas-cooled reactor and the target model of the selected target type.

[0073] For example, the pebble bed high-temperature gas-cooled reactor physical and thermal calculation software can be selected as the VSOP software, and the Monte Carlo software can be selected as the MCNP software.

[0074] Step S102, based on the core model and the target model, the core state under a plurality of working conditions is calculated to obtain core key parameters.

[0075] For example, the plurality of working conditions can include but are not limited to full power working condition, low power working condition and subcritical working condition, and the core key parameters can include but are not limited to core power distribution, temperature distribution and gas pressure.

[0076] This step calculates the core state under typical working conditions (full power, low power, subcritical) according to the established core model and target model, and obtains core key parameters such as core power distribution, temperature distribution and gas pressure, thereby providing basic data for the subsequent steps.

[0077] In step S103, it is judged whether the core key parameter belongs to the safety range, and in the case that the core key parameter belongs to the safety range, an accident progression sequence calculation is performed based on the core key parameter to obtain a simulated accident result.

[0078] It should be noted that after the core state calculation is completed, safety evaluation is performed, that is, it is judged whether the core key parameter belongs to the safety range, and in the case that the core key parameter belongs to the safety range, the next step of accident safety analysis is performed, that is, the accident progression sequence calculation is performed based on the core key parameter.

[0079] In some embodiments, the method for performing the accident progression sequence calculation based on the core key parameter to obtain the simulated accident result comprises: inputting the core key parameter into an accident analysis program to perform the accident progression sequence calculation and obtain the simulated accident result.

[0080] For example, the calculation result of the core state calculation is input into the accident analysis program TINTE to perform the accident progression sequence calculation, simulate the changes of core parameters such as core power density, fuel element temperature, pressure and other key physical and thermal parameters during the accident, and obtain the simulated accident result.

[0081] In some embodiments, the step further comprises: in the case that the core key parameter does not belong to the safety range, re-establishing a target irradiation scheme, and returning to step S101 to establish the core model of the pebble bed type high temperature gas cooled reactor and the target model of the selected target type based on the re-established target irradiation scheme.

[0082] That is, in the case that the core key parameter does not belong to the safety range, a new countermeasure needs to be established, such as adjusting the target loading amount or changing the target structure to re-design the target irradiation scheme, and returning to step S101 for execution.

[0083] For example, the re-establishment of the target irradiation scheme can include but is not limited to adjusting the target loading amount in the target irradiation scheme and changing the target structure in the target irradiation scheme.

[0084] In step S104, it is judged whether the simulated accident result is enveloped by a safety accident in the final safety analysis report of the high temperature gas cooled reactor, and in the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor, a safety analysis result of the high temperature gas cooled reactor isotope irradiation production is obtained.

[0085] In the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor, it can be determined that the target irradiation scheme meets the safety requirements of the reactor, and the physical and thermal safety analysis demonstration of the present application is completed.

[0086] In some embodiments, the step further includes: in the case that the simulated accident result is not enveloped by a safety accident in the final safety analysis report of the high-temperature gas-cooled reactor, it can be determined that the target irradiation scheme does not meet the safety requirements of the reactor, a new target irradiation scheme needs to be formulated again, and step S101 is returned to establish the core model of the pebble bed high-temperature gas-cooled reactor and the target model of the selected target type based on the newly formulated target irradiation scheme.

[0087] Exemplarily, the simulated accident result is compared with the accident in the final safety analysis report (FSAR) of the high-temperature gas-cooled reactor, and whether the target irradiation process can be enveloped by the original safety analysis report is analyzed. If the simulated accident result can be enveloped by the safety accident in the FSAR, it indicates that the target irradiation scheme meets the safety requirements of the reactor, and if not, it indicates that the target irradiation scheme is not feasible and needs to be adjusted again.

[0088] The application comprehensively considers the design features, system settings, design procedures, and isotope irradiation schemes of the pebble bed high-temperature gas-cooled reactor, and first formulates a safety analysis method for isotope irradiation production of the pebble bed high-temperature gas-cooled reactor.

[0089] The safety analysis method for isotope irradiation production of the high-temperature gas-cooled reactor of the embodiments of the application is based on the formulated target irradiation scheme of the isotope, constructs the core model of the pebble bed high-temperature gas-cooled reactor and the target model, calculates the core state under multiple working conditions based on the model, and performs safety evaluation and accident simulation of the target irradiation scheme based on the calculation result. Finally, the physical and thermal safety analysis demonstration of the application is completed by comparing the final safety analysis report of the reactor; how to carry out the physical and thermal safety analysis of the isotope irradiation production of the pebble bed high-temperature gas-cooled reactor is clarified, and the safety analysis demonstration related to the risk determination, procedure selection, model establishment, safety evaluation, and countermeasure formulation of the subsequent isotope production of the high-temperature reactor is provided for reference.

[0090] In order to realize the above-mentioned embodiments, the application further provides a safety analysis system for isotope irradiation production of a high-temperature gas-cooled reactor. Figure 6 A block diagram of a safety analysis system for isotope irradiation production of a high-temperature gas-cooled reactor provided by the embodiments of the application is shown in FIG. 1. As shown in the figure, the safety analysis system for isotope irradiation production of the high-temperature gas-cooled reactor can include a model establishment module 201, a state calculation module 202, an accident simulation module 203, and an accident comparison module 204. Figure 6

[0091] The model establishment module 201 is configured to establish the core model of the pebble bed high-temperature gas-cooled reactor and the target model of the selected target type based on the formulated target irradiation scheme.

[0092] ​The state calculation module 202 is configured to calculate the core state under multiple working conditions based on the core model and the target model, and obtain core key parameters.

[0093] The accident simulation module 203 is configured to determine whether the core key parameters are within a safety range, and in the case that the core key parameters are within the safety range, perform accident progression sequence calculation based on the core key parameters to obtain a simulated accident result.

[0094] The accident comparison module 204 is configured to determine whether the simulated accident result is enveloped by a safety accident in a final safety analysis report of the high-temperature gas-cooled reactor, and in the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor, obtain a safety analysis result of isotope irradiation production of the high-temperature gas-cooled reactor.

[0095] In some implementations, the system includes a scheme adjustment module 205 configured to:

[0096] In the case that the core key parameters are not within the safety range, the scheme adjustment module 205 is configured to reformulate the target irradiation scheme.

[0097] In some implementations, the accident comparison module 204 is specifically configured to:

[0098] In the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor, the accident comparison module 204 is configured to determine that the target irradiation scheme meets the safety requirements of the reactor.

[0099] In some implementations, the scheme adjustment module 205 is further configured to:

[0100] In the case that the simulated accident result is not enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor, the scheme adjustment module 205 is configured to reformulate the target irradiation scheme.

[0101] In some implementations, the model establishment module 201 is specifically configured to:

[0102] The model establishment module 201 is configured to establish the core model of the high-temperature gas-cooled reactor and the target model of the selected target type by using a physical and thermal calculation software of the high-temperature gas-cooled reactor and a Monte Carlo software.

[0103] In some implementations, the accident simulation module 203, when performing the accident progression sequence calculation based on the core key parameters to obtain the simulated accident result, is configured to:

[0104] The accident simulation module 203 is configured to input the core key parameters into an accident analysis program to perform the accident progression sequence calculation and obtain the simulated accident result.

[0105] In some implementations, the scheme adjustment module 205, when reformulating the target irradiation scheme, is configured to:

[0106] Adjusting a target loading amount in a target irradiation scheme and changing a target structure in the target irradiation scheme.

[0107] In some implementations, the plurality of operating conditions includes a full power operating condition, a low power operating condition, and a subcritical operating condition, and the core key parameters include a core power distribution, a temperature distribution, and a gas pressure.

[0108] In some implementations, the selection of the target type is based on a neutron absorption characteristic of a target material.

[0109] It should be noted that the foregoing explanation of the embodiment of the safety analysis method for the isotope irradiation production of the high-temperature gas-cooled reactor also applies to the safety analysis system for the isotope irradiation production of the high-temperature gas-cooled reactor of the embodiment, which will not be repeated here.

[0110] To achieve the above-mentioned embodiments, the present application further provides an electronic device. Please refer to Figure 7 , Figure 7 is a block diagram of the electronic device provided by the embodiment of the present application. As shown in Figure 7 , the electronic device 700 includes a processor 701 and a memory 702 connected with the processor 701; the memory 702 stores computer execution instructions; the processor 701 executes the computer execution instructions stored in the memory to realize the method provided by the foregoing embodiment.

[0111] To achieve the above-mentioned embodiments, the present application further provides a computer readable storage medium, which stores computer execution instructions, and the computer execution instructions are used to realize the method provided by the foregoing embodiment when executed by a processor.

[0112] To achieve the above-mentioned embodiments, the present application further provides a computer program product, which includes a computer program, and the computer program is used to realize the method provided by the foregoing embodiment when executed by a processor.

[0113] The collection, storage, use, processing, transmission, provision and disclosure of the user's personal information involved in the present application comply with the relevant laws and regulations and do not violate public order and good customs.

[0114] It should be noted that the personal information from the user should be collected for legal and reasonable purposes, and should not be shared or sold outside these legal uses. In addition, such collection / sharing should be carried out after the user's informed consent is obtained, including but not limited to informing the user to read the user agreement / user notice before the user uses the function, and signing the agreement / authorization including authorization of relevant user information. In addition, any necessary steps should be taken to protect and ensure access to such personal information data, and to ensure that other people with access to personal information data comply with their privacy policy and processes.

[0115] The present application contemplates an implementation that provides users with the ability to selectively opt in or opt out of permitting the collection and / or use of their personal information data. That is, the present disclosure contemplates providing users with the ability to prevent or limit the collection and / or use of their personal information data. For example, the present disclosure contemplates providing users with the ability to prevent or limit the collection and / or use of their personal information data by, for example, blocking or deleting cookies. In addition, the present disclosure contemplates providing users with the ability to determine whether and how to interact with the present disclosure by, for example, blocking web beacons. Further, the present disclosure contemplates providing users with the ability to access and / or edit their personal information data when such data is collected by the present disclosure. In addition, the present disclosure contemplates that the collection and / or use of personal information data can be limited to only those users who expressly consent or give permission to the collection and / or use of their personal information data.

[0116] In the foregoing detailed description, the description used with respect to the terms "one embodiment", "some embodiments”, "an example”, "a specific example” or "some examples” etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. Illustrative appearances of the above terms are not necessarily referred to the same embodiment or example throughout the description. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Additionally, the description used with respect to different embodiments or examples of the present application and the features thereof can be combined and combined in any suitable manner, without contradiction, by those skilled in the art.

[0117] In addition, the terms "first”, "second”, etc. are used herein only to describe various features and do not imply or connote relative importance or a number of indicated technical features. Thus, a feature defined with "first” or "second” can explicitly or implicitly include at least one of the feature. In the description of the present application, the meaning of "plurality” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0118] Any process or method descriptions or blocks in flow charts or otherwise described herein represent embodiments that can be managed as one or more modules, segments, or portions of code that include one or more executable instructions for implementing specific logic functions or steps, and the various embodiments of the present application contemplate the use of either one or more of the above-described processes or methods with or without any specific order described or implied. It should also be understood that each block of the flow chart illustrations, and combinations of blocks in the flow chart illustrations, can be implemented by computer program instructions or pieces of code contained in computer-readable media.

[0119] The logic and / or steps represented in the flowcharts and / or described herein, for example, can be considered as a sequence of executable instructions stored in a computer readable medium, which can be executed by an instruction execution system, apparatus or device, such as a computer-based system, processor- based system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions, or a combination thereof. For the purposes of this specification, a "computer readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer readable medium can specifically include the following, which are non-exhaustive list: electrical connection (electrical device having one or more wires), portable computer diskette (magnetic device), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or Flash memory), optical fiber device, and portable compact disc read-only memory (CDROM). In addition, the computer readable medium can even be paper or other suitable medium upon which the program is printed, as the program can be electronically captured, for example, by optically scanning the paper or other suitable medium, then electronically converted into a form that can be edited, compiled, or interpreted, or otherwise processed in electronic form into an executable form suitable for use in the instruction execution system, apparatus or device.

[0120] It should be understood that parts of the present application can be implemented in hardware, software, firmware or a combination thereof. In the above embodiments, a plurality of steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As such, if implemented in hardware, and in another embodiment, any of the following technologies known in the art or their combination can be used: discrete logic circuit with logic gates for implementing logic functions on data signals, application specific integrated circuit with appropriate combinational logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0121] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing related hardware, and the programs can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0122] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing module, or each of the units can be physically present separately, or two or more units can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0123] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method of safety analysis for high temperature gas cooled reactor isotope irradiation production, characterized by, The method comprises the following steps: establishing a core model of the pebble bed type high temperature gas cooled reactor and a target model of a selected target type based on a formulated target irradiation scheme; calculating core states under multiple working conditions based on the core model and the target model to obtain core key parameters; judging whether the core key parameters belong to a safe range, and in the case that the core key parameters belong to the safe range, performing accident progression sequence calculation based on the core key parameters to obtain a simulated accident result; judging whether the simulated accident result is enveloped by a safety accident in a final safety analysis report of the high temperature gas cooled reactor, and in the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor, obtaining a safety analysis result of isotope irradiation production of the high temperature gas cooled reactor.

2. The method of claim 1, wherein, The method further comprises: in the case that the core key parameters do not belong to the safe range, reformulating the target irradiation scheme.

3. The method of claim 1, wherein, The obtaining of the safety analysis result of isotope irradiation production of the high temperature gas cooled reactor based on whether the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor comprises: in the case that the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor, determining that the target irradiation scheme meets safety requirements of the reactor.

4. The method of claim 3, wherein, The obtaining of the safety analysis result of isotope irradiation production of the high temperature gas cooled reactor based on whether the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor further comprises: in the case that the simulated accident result is not enveloped by the safety accident in the final safety analysis report of the high temperature gas cooled reactor, reformulating the target irradiation scheme.

5. The method of claim 1, wherein, The establishing of the core model of the pebble bed type high temperature gas cooled reactor and the target model of the selected target type comprises: establishing the core model of the pebble bed type high temperature gas cooled reactor and the target model of the selected target type by using a physical and thermal calculation software and a Monte Carlo software of the pebble bed type high temperature gas cooled reactor.

6. The method of claim 1, wherein, The performing of the accident progression sequence calculation based on the core key parameters to obtain the simulated accident result comprises: inputting the core key parameters into an accident analysis program to perform the accident progression sequence calculation and obtain the simulated accident result.

7. The method according to claim 2 or 4, characterized in that, The reformulating of the target irradiation scheme comprises: adjusting a target loading amount in the target irradiation scheme and changing a target structure in the target irradiation scheme.

8. The method of claim 1, wherein, The multiple working conditions comprise a full power working condition, a low power working condition and a subcritical working condition, and the core key parameters comprise a core power distribution, a temperature distribution and a gas pressure.

9. The method of claim 1, wherein, The selection of the target type is based on a neutron absorption characteristic of a target material.

10. A high temperature gas cooled reactor isotope production irradiation safety analysis system characterized by, The method comprises: a model establishing module configured to establish a core model of the pebble bed type high temperature gas cooled reactor and a target model of a selected target type based on a formulated target irradiation scheme; a state calculating module configured to calculate core states under multiple working conditions based on the core model and the target model to obtain core key parameters; An accident simulation module is configured to determine whether the core key parameter is in a safety range, and perform an accident development sequence calculation based on the core key parameter to obtain a simulated accident result, if the core key parameter is in the safety range. An accident comparison module is configured to determine whether the simulated accident result is enveloped by a safety accident in a final safety analysis report of the high-temperature gas-cooled reactor, and obtain a safety analysis result of isotope irradiation production of the high-temperature gas-cooled reactor, if the simulated accident result is enveloped by the safety accident in the final safety analysis report of the high-temperature gas-cooled reactor.

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