Non-crevasse accident analysis method of accident-resistant fuel scheme, processing device, storage medium and computer program product

Abstract

The invention provides a non-crevasse accident analysis method of an accident-resistant fuel scheme, a processing device, a storage medium and a computer program product. The non-crevasse accident analysis method for the accident-resistant fuel scheme comprises the following steps: selecting a non-crevasse accident working condition, and determining an acceptance criterion of accident analysis of the accident-resistant fuel scheme according to the non-crevasse accident working condition and the accident-resistant fuel scheme; according to the non-crevasse accident working condition and the anti-accident fuel scheme, initial conditions and assumed parameters of accident analysis of anti-accident fuel are determined; inputting the initial condition and the hypothesis parameter into an analysis model to obtain an accident calculation result; and obtaining an accident analysis conclusion of the non-crevasse accident working condition by combining the accident calculation result and the acceptance criterion of the corresponding non-crevasse accident working condition. The method can be suitable for non-crevasse accident analysis under the influence of an ATF scheme.

Description

Technical Field

[0001] The present invention relates to accident-resistant fuel for nuclear power plants, and in particular to a non-breach accident analysis method, a processing device, a storage medium and a computer program product for an accident-resistant fuel scheme. Background Art

[0002] In order to improve the safety of nuclear power plants to cope with power outages, the international nuclear fuel community has proposed the concept of accident-tolerant fuel (ATF) to enhance accident tolerance. ATF can overcome the inherent defects of the existing UO2-Zr fuel system, fundamentally improve the reactor's ability to withstand severe accidents, and provide a practical nuclear fuel solution for the goal of "eliminating the possibility of large-scale radioactive material release from the design" of nuclear power plants. At the same time, it should also maintain or improve the performance under normal operation, transient operation, and design basis and beyond design basis accidents.

[0003] However, the non-rupture accident analysis method currently applicable to conventional fuel assemblies is no longer applicable to the non-rupture accident analysis under the influence of the ATF scheme. If the non-rupture accident analysis method of conventional fuel assemblies continues to be used, erroneous analysis results will occur, and the degree of improvement and optimization of the ATF scheme compared with conventional fuel assemblies cannot be accurately evaluated, and the reactor will face unexpected safety risks in actual operation. Summary of the invention

[0004] The object of the present invention is to provide a non-breach accident analysis method, a processing device, a storage medium and a computer program product for an accident-resistant fuel scheme, which can be applied to the non-breach accident analysis under the influence of the ATF scheme.

[0005] One aspect of the present invention provides a non-breach accident analysis method for an accident-resistant fuel scheme, comprising: selecting a non-breach accident condition, and determining acceptance criteria for accident analysis of the accident-resistant fuel scheme based on the non-breach accident condition and the accident-resistant fuel scheme; determining initial conditions and assumed parameters for accident analysis of the accident-resistant fuel based on the non-breach accident condition and the accident-resistant fuel scheme; inputting the initial conditions and the assumed parameters into an analysis model to obtain accident calculation results; and combining the accident calculation results with the acceptance criteria corresponding to the non-breach accident condition to obtain an accident analysis conclusion for the non-breach accident condition.

[0006] In one embodiment, the non-breach accident conditions include loss of off-site power, increased primary side heat output, reduced heat removal capacity of the secondary side system, decreased flow of the reactor coolant system, and abnormal reactivity and power distribution.

[0007] In one embodiment, the accident-resistant fuel solution includes a combination of one or more parameters of the accident-resistant fuel: fuel properties, fuel geometry, fuel melting temperature, heat transfer coefficient, and fuel cladding peak temperature.

[0008] In one embodiment, the selecting of non-breach accident conditions and determining the acceptance criteria for accident analysis of the anti-accident fuel scheme based on the non-breach accident conditions and the anti-accident fuel scheme include: selecting non-breach accident conditions, determining the operating condition category corresponding to the non-breach accident conditions, and obtaining conventional acceptance criteria under the operating condition category; determining the acceptance criteria for accident analysis of the anti-accident fuel scheme based on the conventional acceptance criteria and in combination with the anti-accident fuel scheme.

[0009] In one embodiment, the acceptance criteria for accident analysis of the accident-resistant fuel scheme are determined based on the conventional acceptance criteria and in combination with the accident-resistant fuel scheme: in combination with the accident-resistant fuel scheme, the criteria involving fuel core blocks and cladding in the conventional acceptance criteria are re-determined to form the acceptance criteria for accident analysis of the accident-resistant fuel scheme.

[0010] In one embodiment, the initial conditions and assumed parameters for accident analysis of the anti-accident fuel are determined based on the non-breach accident conditions and the anti-accident fuel scheme, including: determining the initial conditions in a conservative direction based on the non-breach accident conditions; and re-determining the conditions in the initial conditions in a conservative direction that are affected by the anti-accident fuel scheme in combination with the anti-accident fuel scheme, to form the initial conditions for accident analysis of the anti-accident fuel.

[0011] In one embodiment, the determining of initial conditions and assumed parameters for accident analysis of the anti-accident fuel based on the non-breach accident conditions and the anti-accident fuel scheme also includes: determining basic assumed parameters based on the non-breach accident conditions; determining parameters affected by the anti-accident fuel scheme in combination with the anti-accident fuel scheme; and using the basic assumed parameters and the parameters affected by the accident fuel scheme as assumed parameters for accident analysis of the anti-accident fuel.

[0012] In one embodiment, the parameters affected by the accident-resistant fuel scheme include a combination of one or more parameters of fuel geometry parameters, fuel physical property parameters, fuel flow heat transfer characteristic parameters, neutron kinetic parameters, and reactivity feedback parameters.

[0013] Another aspect of the present invention provides a processing device for non-breach accident analysis of an accident-resistant fuel scheme, comprising: a memory; and a processor, the processor being connected to the memory and configured to implement the non-breach accident analysis method of an accident-resistant fuel scheme as described in any one of the above embodiments.

[0014] Yet another aspect of the present invention provides a storage medium for storing non-transitory computer instructions. When the non-transitory computer instructions are executed, the non-breach accident analysis method of the accident-resistant fuel scheme as described in any one of the above embodiments is executed.

[0015] Another aspect of the present invention provides a computer program product, comprising a computer program, which, when executed by a processor, implements the non-breach accident analysis method of the accident-resistant fuel scheme as described in any one of the above embodiments.

[0016] The non-rupture accident analysis method for the accident-resistant fuel scheme of the present invention, combined with the characteristics of the accident-resistant fuel scheme, can fully consider the differences in material properties between the accident-resistant fuel and conventional fuel, so as to more accurately predict key parameters such as temperature changes and stress changes of fuel core blocks and cladding during the accident, accurately evaluate the degree of development and potential risks of the accident, and clearly understand the performance of the accident-resistant fuel under accident conditions; for a variety of accident-resistant fuel schemes, the non-rupture accident analysis method for the accident-resistant fuel scheme of the present invention can be used for comparative evaluation, which is helpful to optimize the accident-resistant fuel scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a flow chart of an embodiment of a non-breach accident analysis method for an accident-resistant fuel scheme according to the present invention;

[0019] Figure 2 1 is a flow chart of another embodiment of the non-breach accident analysis method for the accident-resistant fuel scheme according to the present invention. DETAILED DESCRIPTION

[0020] Accident Tolerant Fuel (ATF), also known as accident-resistant fuel or accident-tolerant fuel, is a fuel technology that significantly mitigates the consequences of accidents and delays the progress of accidents while maintaining or improving the fuel performance of normal operation and expected transient conditions. It optimizes fuel performance by improving the surface material of the fuel cladding. Compared with traditional UO2-Zr fuel assemblies, it can withstand the test of loss of core cooling for a much longer time and has equivalent or better fuel performance under normal conditions, especially providing a longer accident response time, and on this basis, mitigate the consequences of accidents through active or passive means.

[0021] The candidate materials for accident-tolerant fuel cladding mainly include SiC composite materials, refractory metals and their alloys (Mo alloys are preferred), Al-containing stainless steel, and surface-modified or coated zirconium alloys. The candidate materials for accident-tolerant fuel pellets mainly include UO2 materials doped with a high thermal conductivity second phase, metal fuels, composite fuels, etc. Among them, the preparation of high-temperature oxidation-resistant coatings on the surface through the use of surface modification technology is an important research direction for improving the performance of zirconium alloy cladding. Authoritative nuclear safety regulatory agencies represented by the U.S. Nuclear Regulatory Commission (NRC) have specifically carried out phenomenon identification for coated ATF and issued review and regulatory requirements. International advanced nuclear fuel technology developers represented by Westinghouse and Fabato have also placed coated ATF fuel rods in commercial reactors for irradiation tests and gradually obtained post-irradiation inspection data.

[0022] However, the non-rupture accident analysis method currently applicable to conventional fuel assemblies is no longer applicable to the non-rupture accident analysis under the influence of the ATF scheme. If the non-rupture accident analysis method of conventional fuel assemblies continues to be used, erroneous analysis results will occur, and the degree of improvement and optimization of the ATF scheme compared with conventional fuel assemblies cannot be accurately evaluated, and the reactor will face unexpected safety risks in actual operation.

[0023] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.

[0024] Figure 1 An embodiment of the non-breach accident analysis method of the accident-resistant fuel scheme of the present invention is shown. Figure 1 As shown, the non-breach accident analysis method of the accident-resistant fuel scheme of the present invention includes steps S100 to S400:

[0025] In step S100, a non-breach accident condition is selected, and based on the non-breach accident condition and the accident-resistant fuel solution, an acceptance criterion for accident analysis of the accident-resistant fuel solution is determined.

[0026] In step S200, initial conditions and assumed parameters for accident analysis of the accident-resistant fuel are determined according to the non-breach accident condition and the accident-resistant fuel solution.

[0027] In step S300, initial conditions and assumed parameters are input into the analysis model to obtain accident calculation results.

[0028] In step S400, the accident calculation result and the acceptance criteria corresponding to the non-breach accident condition are combined to obtain the accident analysis conclusion of the non-breach accident condition.

[0029] The non-rupture accident analysis method for the accident-resistant fuel scheme of the present invention, combined with the characteristics of the accident-resistant fuel scheme, can fully consider the differences in material properties between the accident-resistant fuel and conventional fuel, so as to more accurately predict key parameters such as temperature changes and stress changes of fuel core blocks and cladding during the accident, accurately evaluate the degree of development and potential risks of the accident, and clearly understand the performance of the accident-resistant fuel under accident conditions; for a variety of accident-resistant fuel schemes, the non-rupture accident analysis method for the accident-resistant fuel scheme of the present invention can be used for comparative evaluation, which is helpful to optimize the accident-resistant fuel scheme.

[0030] The non-breach accident analysis method of the accident-resistant fuel scheme of the present invention takes a pressurized water reactor nuclear power plant as an object and carries out a non-breach accident analysis method evaluation for the ATF scheme.

[0031] The accident-resistant fuel scheme includes a combination of one or more parameters of the fuel physical properties, fuel geometric dimensions, fuel melting temperature, heat transfer coefficient, and fuel cladding peak temperature of the accident-resistant fuel. That is, the above one or more parameters constitute the accident-resistant fuel scheme. Different accident-resistant fuel schemes have different parameters. Among them, the ATF fuel pellets may have higher thermal conductivity or different thermal expansion coefficients, and the cladding material may have better high temperature resistance or oxidation resistance.

[0032] In one embodiment, step S100 further includes steps S110 to S120:

[0033] In step S110, a non-breach accident condition is selected, the condition category corresponding to the non-breach accident condition is determined, and conventional acceptance criteria under the condition category are obtained.

[0034] Among them, non-breach accident conditions include loss of off-site power, increased primary side heat output, reduced heat removal capacity of the secondary side system, decreased flow of the reactor coolant system, and abnormal reactivity and power distribution.

[0035] The operating condition categories include but are not limited to Class II operating conditions, Class III operating conditions and Class IV operating conditions, and each non-breach accident operating condition can be classified into a certain type of operating condition.

[0036] In step S120, based on conventional acceptance criteria and in combination with the accident-resistant fuel scheme, acceptance criteria for accident analysis of the accident-resistant fuel scheme are determined.

[0037] Further, step S120 may be: combining the accident-resistant fuel solution, redefining the criteria involving fuel pellets and cladding in the conventional acceptance criteria, and forming the acceptance criteria for accident analysis of the accident-resistant fuel solution.

[0038] Specifically, the acceptance criteria for Class II conditions are as follows:

[0039] 1) The minimum deviation from nucleate boiling ratio (DNBR) is higher than the DNBR limit to ensure the integrity of the fuel cladding;

[0040] 2) The peak linear heat generation rate cannot exceed the value that causes the core of the fuel to melt;

[0041] 3) The pressure of RCS and main steam system should not be higher than the design pressure;

[0042] 4) It cannot lead to more serious accident conditions without the occurrence of other single failures.

[0043] The acceptance criteria for Category III conditions are as follows:

[0044] 1) Only a small fraction of the fuel elements are damaged;

[0045] 2) The release of radioactive materials must not affect or restrict the use of these areas by the public outside the boundaries of non-residential areas.

[0046] Among them, considering that ATF changes the fuel pellet and cladding materials, specifically in the Class II working condition, 1) is the criterion related to the cladding, and 2) is the criterion related to the fuel pellet; specifically in the Class III working condition: 1) is the criterion related to the fuel pellet. Therefore, in step S120, for different types of working conditions, it is necessary to further quantify the non-rupture accident analysis acceptance criteria related to the fuel pellet and cladding.

[0047] For Class IV operating conditions, the acceptance criteria can be determined based on specific accidents. The above criteria need to be quantitatively determined based on different ATF fuels.

[0048] In one embodiment, step S200 further includes steps S210 to S250:

[0049] In step S210, according to the non-breach accident condition, the initial conditions in the conservative direction are determined. The initial conditions can be understood as the boundary conditions of the program.

[0050] The conservative direction means that when determining the initial conditions, the most unfavorable situation should be considered, that is, the situation where the accident will develop into a more serious trend, so as to ensure that the result of the accident analysis has sufficient safety. The present invention does not limit the specific conservative direction.

[0051] In step S220, in combination with the anti-accident fuel scheme, the conditions affected by the anti-accident fuel scheme in the initial conditions under the conservative direction are re-determined to form the initial conditions for the accident analysis of the anti-accident fuel. That is, the initial conditions should fully consider the changes in the application of the ATF scheme, such as the parameter conditions of the ATF scheme such as energy storage.

[0052] Among them, under the ATF scheme, uncertainties need to be considered for the initial conditions, such as core power, average temperature of the reactor coolant system, and pressurizer pressure.

[0053] In step S230, basic assumption parameters are determined according to the non-breach accident condition.

[0054] Among them, the basic assumption parameters are irrelevant to the ATF scheme. The basic assumptions that can be used include: 1) loss of off-site power supply; 2) the maximum value rod is stuck outside the reactor; 3) only the mitigation effect of safety-level equipment is considered, and if non-safety equipment has an adverse effect on the accident, it is assumed to be effective; 4) assuming a single failure of the limit.

[0055] In step S240 , in combination with the anti-accident fuel scheme, parameters affected by the anti-accident fuel scheme are determined.

[0056] Among them, the parameters affected by the accident-resistant fuel scheme include a combination of one or more parameters among fuel geometry parameters, fuel physical property parameters, fuel flow heat transfer characteristic parameters, neutron kinetic parameters and reactivity feedback parameters, and specifically may include shelf value and pellet thermal conductivity.

[0057] In step S250, the basic assumption parameters and the parameters affected by the accident fuel scheme are used as the assumption parameters for the accident analysis of the anti-accident fuel. That is to say, in addition to the basic assumptions that can still be used, the main parameters affected by the ATF scheme must also be considered. The assumption parameters can be understood as the assumptions other than accidents during the operation process.

[0058] In step S300, the analysis model may be an existing analysis program or software, or an analysis model designed for the non-breach accident analysis method of the present invention.

[0059] In one embodiment, step S400 includes steps S410 to S420:

[0060] In step S410, it is determined whether the accident calculation result meets the acceptance criteria.

[0061] In step S420, if the accident calculation result meets the acceptance criteria, the accident analysis conclusion of the non-breach accident condition is output; if the accident calculation result does not meet the acceptance criteria, steps S100 to S410 are re-executed.

[0062] Figure 2Another embodiment of the non-breach accident analysis method of the accident-resistant fuel scheme of the present invention is shown. Figure 2 As shown, the non-breach accident analysis method of the accident-resistant fuel scheme of the present invention comprises the following steps:

[0063] In step S110, a non-breach accident condition is selected, the condition category corresponding to the non-breach accident condition is determined, and conventional acceptance criteria under the condition category are obtained.

[0064] In step S120, in combination with the accident-resistant fuel solution, the criteria related to the fuel pellets and the cladding in the conventional acceptance criteria are re-determined to form the acceptance criteria for the accident analysis of the accident-resistant fuel solution.

[0065] In step S210, the initial conditions in the conservative direction are determined according to the non-breach accident condition.

[0066] In step S220, in combination with the accident-resistant fuel scheme, the conditions affected by the accident-resistant fuel scheme in the initial conditions under the conservative direction are re-determined to form the initial conditions for the accident analysis of the accident-resistant fuel.

[0067] In step S230, basic assumption parameters are determined according to the non-breach accident condition.

[0068] In step S240 , in combination with the anti-accident fuel scheme, parameters affected by the anti-accident fuel scheme are determined.

[0069] In step S250, basic assumption parameters and parameters affected by the accident fuel scheme are used as assumption parameters for accident analysis of the anti-accident fuel.

[0070] In step S300, initial conditions and assumed parameters are input into the analysis model to obtain accident calculation results.

[0071] In step S410, it is determined whether the accident calculation result meets the acceptance criteria.

[0072] In step S420, if the accident calculation result meets the acceptance criteria, the accident analysis conclusion of the non-breach accident condition is output; if the accident calculation result does not meet the acceptance criteria, steps S100 to S410 are re-executed.

[0073] The present invention takes into account that the ATF scheme will affect parameters directly related to accident analysis, such as fuel and physical parameters, and focuses on the difference between the ATF scheme and the traditional fuel non-breach accident analysis method. Compared with the existing non-breach accident analysis method, the non-breach accident analysis method can be further optimized under the ATF scheme. The improvement of the non-breach accident analysis method is of great significance to the development of nuclear energy and nuclear safety.

[0074] The processing device for non-breach accident analysis of the accident-resistant fuel scheme of the present invention comprises: a memory and a processor, wherein the processor is connected to the memory and is configured to implement the non-breach accident analysis method of the accident-resistant fuel scheme as described in any of the above embodiments.

[0075] The storage medium of the present invention is used to store non-transitory computer instructions. When the non-transitory computer instructions are executed, the non-breach accident analysis method of the accident-resistant fuel scheme described in any of the above embodiments is executed.

[0076] The computer program product of the present invention comprises a computer program, which, when executed by a processor, implements the non-breach accident analysis method of the accident-resistant fuel scheme as described in any of the above embodiments.

[0077] Embodiments of the subject matter described in this specification may be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a tangible, non-transitory program carrier to be executed by a data processing apparatus or to control the operation of the data processing apparatus. Alternatively or additionally, the program instructions may be encoded on an artificially generated propagated signal, such as a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode information and transmit it to a suitable receiver apparatus for execution by the data processing apparatus.

[0078] The computer storage medium may be a machine-readable storage device, a machine-readable storage substrate, a random or serial access memory device, or a combination of one or more of them.

[0079] Computers suitable for executing computer programs include, for example, general and / or special microprocessors, or any other type of central processing unit. Typically, the central processing unit will receive instructions and data from a read-only memory and / or a random access memory. The basic components of a computer include a central processing unit for implementing or executing instructions and one or more memory devices for storing instructions and data. Typically, the computer will also include one or more large-capacity storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or the computer will be operably coupled to this large-capacity storage device to receive data from it or to transmit data to it, or both. However, the computer does not necessarily have such a device. In addition, the computer can be embedded in another device, such as a mobile phone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a global positioning system (GPS) receiver, or a portable storage device such as a universal serial bus (USB) flash drive, to name a few.

[0080] Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including, for example, semiconductor memory devices (e.g., EPROM, EEPROM and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD ROM and DVD-ROM disks. The processor and memory may be supplemented by, or incorporated in, special purpose logic circuitry.

[0081] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A non-breach accident analysis method for an accident-resistant fuel scheme, characterized in that: include: Selecting a non-breach accident condition, and determining acceptance criteria for accident analysis of the accident-resistant fuel solution based on the non-breach accident condition and the accident-resistant fuel solution; Determining initial conditions and assumed parameters for accident analysis of the accident-resistant fuel according to the non-breach accident condition and the accident-resistant fuel scheme; Inputting the initial conditions and the assumed parameters into the analysis model to obtain the accident calculation result; The accident calculation result and the acceptance criteria corresponding to the non-breach accident condition are combined to obtain the accident analysis conclusion of the non-breach accident condition.

2. The non-breach accident analysis method according to claim 1, characterized in that: The non-breach accident conditions include loss of off-site power, increased primary side heat output, reduced heat removal capacity of the secondary side system, decreased flow of the reactor coolant system, and abnormal reactivity and power distribution.

3. The non-breach accident analysis method according to claim 1, characterized in that: The accident-resistant fuel solution includes a combination of one or more parameters of the accident-resistant fuel including fuel physical properties, fuel geometric dimensions, fuel melting temperature, heat transfer coefficient, and fuel cladding peak temperature.

4. The non-breach accident analysis method according to any one of claims 1 to 3, characterized in that: The selecting of a non-breach accident condition and determining the acceptance criteria for the accident analysis of the accident-resistant fuel solution according to the non-breach accident condition and the accident-resistant fuel solution include: Select a non-breach accident working condition, determine the working condition category corresponding to the non-breach accident working condition, and obtain a conventional acceptance criterion under the working condition category; According to the conventional acceptance criteria, in combination with the accident-resistant fuel scheme, the acceptance criteria for accident analysis of the accident-resistant fuel scheme are determined.

5. The non-breach accident analysis method according to claim 4, characterized in that: According to the conventional acceptance criteria, combined with the accident-resistant fuel scheme, the acceptance criteria for accident analysis of the accident-resistant fuel scheme are determined as follows: In combination with the accident-resistant fuel scheme, the criteria related to fuel pellets and cladding in the conventional acceptance criteria are re-determined to form the acceptance criteria for accident analysis of the accident-resistant fuel scheme.

6. The non-breach accident analysis method according to any one of claims 1 to 3, characterized in that: Determining the initial conditions and assumed parameters of the accident analysis of the accident-resistant fuel according to the non-breach accident condition and the accident-resistant fuel scheme includes: According to the non-breach accident conditions, determine the initial conditions in the conservative direction; In combination with the accident-resistant fuel scheme, the conditions affected by the accident-resistant fuel scheme in the initial conditions in the conservative direction are re-determined to form the initial conditions for accident analysis of the accident-resistant fuel.

7. The non-breach accident analysis method according to claim 6, characterized in that: The determining of initial conditions and assumed parameters of accident analysis of the accident-resistant fuel according to the non-breach accident condition and the accident-resistant fuel scheme also includes: Determine basic assumption parameters according to the non-breach accident conditions; In combination with the accident-resistant fuel scheme, determining parameters affected by the accident-resistant fuel scheme; The basic assumption parameters and the parameters affected by the accident fuel scheme are used as assumption parameters for accident analysis of the anti-accident fuel.

8. The non-breach accident analysis method according to claim 7, characterized in that: The parameters affected by the accident-resistant fuel scheme include a combination of one or more parameters among fuel geometry parameters, fuel physical property parameters, fuel flow heat transfer characteristic parameters, neutron kinetic parameters and reactivity feedback parameters.

9. A processing device for non-breach accident analysis of an accident-resistant fuel scheme, characterized in that: include: Memory; as well as A processor is connected to the memory and is configured to implement the non-breach accident analysis method of the accident-resistant fuel solution according to any one of claims 1-8.

10. A storage medium, characterized in that: The device is used for storing non-transitory computer instructions, and when the non-transitory computer instructions are executed, the non-breach accident analysis method of the accident-resistant fuel scheme according to any one of claims 1 to 8 is executed.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the non-breach accident analysis method of the accident-resistant fuel scheme according to any one of claims 1 to 8 is implemented.

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