CN109858157B - Calculation method and system for annular fuel assembly - Google Patents
Calculation method and system for annular fuel assembly Download PDFInfo
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- CN109858157B CN109858157B CN201910101082.1A CN201910101082A CN109858157B CN 109858157 B CN109858157 B CN 109858157B CN 201910101082 A CN201910101082 A CN 201910101082A CN 109858157 B CN109858157 B CN 109858157B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to the field of annular fuel assembly analysis, and discloses a calculation method and a calculation system of an annular fuel assembly, which are used for improving the calculation efficiency, effectively reducing the calculation process, reducing the calculation error rate, reducing the total calculation time and being simple and convenient to implement; the method of the invention comprises the following steps: dividing the annular fuel assembly by taking the annular fuel rod as a unit, distinguishing all parts of the annular fuel rod, and distributing corresponding calculation modules for the parts of the annular fuel rod; if the calculation results of the two calculation modules influence each other, the two calculation modules are considered to be associated calculation modules, otherwise, the two calculation modules are mutually independent calculation modules; and carrying out serial calculation on the calculation modules which are related to each other, carrying out parallel calculation on the calculation modules which are independent of each other until the performance of each part of the annular fuel rod is calculated, and carrying out parallel calculation on all the fuel rods.
Description
Technical Field
The invention relates to the field of annular fuel assembly analysis, in particular to a calculation method and a calculation system of an annular fuel assembly.
Background
The annular fuel is a novel reactor fuel rod which is formed by manufacturing fuel pellets into an annular shape, installing cladding round tubes inside and outside the pellets, and installing end plugs at two ends. However, in the annular fuel rod performance analysis, it can be reduced to calculations shown as the annular fuel radial cut in FIG. 1 and the annular fuel rod axial cut in FIG. 2. The annular fuel pellets are subjected to thermal neutron irradiation, fission reaction occurs, fission energy is released, the fission energy flows through the gaps of the fuel rods and the cladding into the inner and outer runners in the form of heat energy, and the coolant brings energy out.
The calculation task of the transient performance analysis of the annular fuel is to calculate performance data of all parts of the annular fuel rod under steady-state and transient working conditions when the annular fuel rod irradiates in a pile, wherein the parts of the annular fuel rod comprise performance data such as inner and outer shells, inner and outer runners, temperature distribution of pellets, stress state, release rate (FGR) of fission gas, gas pressure in the annular fuel rod, hydrogenated corrosion of the shells and the like. The transient performance analysis of the annular fuel is a serial calculation method, when the data volume is small, the calculation speed is high, the real-time performance is good, but when the data volume is continuously increased, the calculation time of each part of the annular fuel is increased exponentially. In practice, taking a component as an example, it is assumed that the number of axial sampling points is 20, the number of radial sampling points is 17, the number of fuel rods of the fuel assembly was 17 x 17 and the number of calculated time steps was 77, in which case the total amount was 20 x 17 x 77 = 7566020. But this is simply the amount of data and not the amount of computation. Therefore, the conventional serial calculation requires a lot of time.
Therefore, how to improve the calculation efficiency, reduce the calculation process, reduce the calculation error rate, and reduce the total calculation time becomes an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a calculation method and a calculation system of an annular fuel assembly, which are used for reducing total calculation time.
To achieve the above object, the present invention provides a method for calculating an annular fuel assembly, comprising the steps of:
s1: dividing the annular fuel assembly by taking an annular fuel rod as a unit, distinguishing all parts of the annular fuel rod, and distributing corresponding calculation modules for the parts of the annular fuel rod;
s2: analyzing the calculation relation among the calculation modules in the step S1, and if the calculation results of the two calculation modules influence each other, considering the two calculation modules as associated calculation modules, otherwise, as mutually independent calculation modules;
s3: and carrying out serial calculation on the calculation modules which are related to each other, carrying out parallel calculation on the calculation modules which are independent of each other until the performance of each part of the annular fuel rod is calculated, and carrying out parallel calculation on all the fuel rods.
Preferably, each component of the annular fuel rod comprises a pellet, an inner gap arranged on the inner side of the pellet, an outer gap arranged on the outer side of the pellet, an inner cladding arranged on the inner side of the inner gap, an outer cladding arranged on the outer side of the outer gap, a coolant inner runner arranged on the inner side of the inner cladding, and a coolant outer runner arranged on the outer side of the outer cladding.
Preferably, the calculation module includes: the device comprises an axial power distribution calculation module, a burnup and burnup increment calculation module, a nuclide distribution calculation module, a radial power distribution calculation module, a core package temperature distribution calculation module, a mechanical calculation module, a cladding oxidation calculation module, a cladding hydrogen absorption calculation module and an internal pressure calculation module;
wherein the shell oxidation calculation module, the shell hydrogen absorption calculation module and the internal pressure calculation module are mutually independent calculation modules; the axial power distribution calculation module, the burnup and burnup increment calculation module, the nuclide distribution calculation module, the radial power distribution calculation module, the core package temperature distribution calculation module and the mechanical calculation module are associated calculation modules.
Preferably, in the step S1, when the number of annular fuel rods included in the annular fuel assembly is greater than the set number, the annular fuel assemblies are grouped, and then parallel calculation is performed for each group of annular fuel.
As a general technical idea, the present invention also provides a computing system of an annular fuel assembly, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.
The invention has the following beneficial effects:
the invention provides a calculation method and a calculation system for an annular fuel assembly, which are characterized in that corresponding calculation modules are distributed for the components of the annular fuel assembly by distinguishing the components of the annular fuel assembly, the relation among the calculation modules is analyzed, and the calculation modules are calculated in parallel according to the relation, so that the calculation efficiency can be improved, the calculation process can be effectively reduced, the calculation error rate can be reduced, the total calculation time can be reduced, and the implementation is simple and convenient.
The invention will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic radial cut view of an annular fuel rod of a preferred embodiment of the present invention;
FIG. 2 is a schematic axial cross-sectional view of a ring fuel rod of a preferred embodiment of the present invention;
FIG. 3 is a flow chart of a method of calculating an annular fuel rod assembly in accordance with a preferred embodiment of the present invention;
FIG. 4 is a flowchart of a method for calculating the temperature distribution of a core pack according to a preferred embodiment of the present invention;
FIG. 5 is a flow chart of a mechanical calculation method according to a preferred embodiment of the present invention.
Reference numerals:
1. an air cavity; 2. an inner gap; 3. an outer gap; 4. a core block; 5. an inner envelope; 6. an outer envelope; 7. a coolant inner flow passage; 8. and a coolant outer flow passage.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terms "first," "second," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to facilitate distinguishing between corresponding features. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "both sides", "outside" and the like are used merely to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship is changed accordingly.
Example 1
Referring to fig. 3, the present embodiment provides a calculation method of an annular fuel assembly, including the steps of:
s1: dividing the annular fuel assembly by taking the annular fuel rod as a unit, distinguishing all parts of the annular fuel rod, and distributing corresponding calculation modules for the parts of the annular fuel rod;
s2: analyzing the calculation relation among the calculation modules in the step S1, and if the calculation results of the two calculation modules influence each other, considering the two calculation modules as associated calculation modules, otherwise, as mutually independent calculation modules;
s3: and carrying out serial calculation on the calculation modules which are related to each other, carrying out parallel calculation on the calculation modules which are independent of each other until the performance of each part of the annular fuel rod is calculated, and carrying out parallel calculation on all the fuel rods.
According to the calculation method of the annular fuel assembly, the corresponding calculation modules are distributed to the components of the annular fuel rod in the annular fuel assembly by distinguishing the components of the annular fuel rod, the relation among the calculation modules is analyzed, and the calculation modules are calculated in parallel according to the relation, so that the calculation efficiency can be improved, the calculation error rate is effectively reduced in the calculation process, the total calculation time is reduced, and the implementation is simple and convenient.
The components of the annular fuel rod include a pellet 4, an inner gap 2 provided inside the pellet 4, an outer gap 3 provided outside the pellet 4, an inner jacket 5 provided inside the inner gap 2, an outer jacket 6 provided outside the outer gap 3, a coolant inner flow passage 7 provided inside the inner jacket 5, and a coolant outer flow passage 8 provided outside the outer jacket 6. Wherein the pellets 4 are placed in the air cavity 1. In this embodiment, the calculation module includes: the device comprises an axial power distribution calculation module, a burnup and burnup increment calculation module, a nuclide distribution calculation module, a radial power distribution calculation module, a core package temperature distribution calculation module, a mechanics calculation module, a cladding oxidation calculation module, a cladding hydrogen absorption calculation module and an internal pressure calculation module. The shell oxidation calculation module, the shell hydrogen absorption calculation module and the internal pressure calculation module are mutually independent calculation modules; the axial power distribution calculation module, the burnup and burnup increment calculation module, the nuclide distribution calculation module, the radial power distribution calculation module, the core package temperature distribution calculation module and the mechanical calculation module are associated calculation modules.
In addition, it should be noted that the performance calculation of the annular fuel rod is mainly performed by using a core-pack temperature distribution calculation and mechanical calculation module, where the core-pack temperature distribution calculation module, when calculating the distribution situation of the core-pack temperature, as shown in fig. 4, specifically calculates, by first assuming an initial cladding external surface temperature of the annular fuel rod, performing distribution calculation on the flow rates of the coolant external flow channel 8 and the coolant internal flow channel 7 of the annular fuel rod according to the cladding external surface temperature, then calculating the heat flux density of the coolant-annular fuel rod according to the distribution calculation result, and further calculating the radial power distribution volumetric heat release rate, the core-pack gap heat transfer coefficient, and the actual surface temperature of the cladding of the annular fuel rod according to the heat flux density, and calculating the calculated radial power distribution volumetric heat release rate, core-gap heat transfer coefficient, and the actual surface temperature of the cladding of the annular fuel rod to obtain the steady-state temperature distribution and transient temperature distribution of the annular fuel rod.
When the mechanical calculation module calculates the mechanical properties, as shown in fig. 5, the specific calculation method is as follows: firstly, calculating the irradiation growth of the cladding, the thermal expansion of the pellet 4 and the cladding and the swelling compaction of the pellet 4, and then, calculating the gap width between the pellet 4 and the cladding according to the deformation condition of the pellet 4 and the cladding obtained by calculation, so as to judge whether the pellet 4 and the cladding are in contact or not, if so, further calculating the deformation condition according to a closed gap mechanical model, and if not, further calculating the deformation by using a open gap mechanical model. And finally, the whole axial section is circulated, so that the deformation condition of the whole fuel rod is obtained.
When the core-package temperature distribution calculation module calculates the distribution condition of the core package temperature and the mechanical calculation module calculates the mechanical property, initial deformation data are adopted when the temperature distribution condition is calculated for the first time, the first time temperature distribution condition is obtained according to the initial data, then the mechanical deformation condition of the fuel rod is calculated according to the temperature distribution condition, then new temperature distribution is calculated again according to the new deformation condition, and when calculation is carried out between the two calculation modules, loop iteration is carried out, so that convergent data are finally obtained. It should be noted that, in the above-mentioned calculation modules, the associated calculation module is similar to the two associated calculation modules when performing specific calculation, and the independent calculation module performs independent calculation, which is not described herein in detail in this embodiment. It should be noted that, in this embodiment, the calculation modules that affect each other during calculation are serially calculated, and the modules that can independently complete calculation during calculation are parallelly calculated, so that the result can be calculated more quickly, the total calculation time is reduced, the influence relationship between the components is fully considered, and the accuracy of the calculation result is further improved.
As a preferred embodiment of the present embodiment, when the number of annular fuel rods included in the annular fuel assembly is greater than the set number, the annular fuel assemblies are grouped, and then parallel calculation is performed for each group of annular fuel. In this embodiment, when the number of annular fuel rods included in the annular fuel assembly is set to be greater than 10×10, the annular fuel assemblies are regarded as being too large, and are required to be divided into smaller annular fuel assemblies for parallel calculation, so that the method can be suitable for annular fuel assemblies with various sizes, and the calculation efficiency of the annular fuel assemblies is improved.
Specifically, after each annular fuel rod is calculated, all annular fuel rods in the annular fuel assembly are calculated in parallel, namely, calculation modules which have no data transmission among all calculation modules and have front-back relation in the calculation process are combined together, independent calculation is performed without front-back relation, then the combined calculation modules are subjected to distribution calculation, and when the combined modules are subjected to distribution calculation, the calculation time of all calculation modules is considered to be distributed, so that the calculation time can be effectively reduced, and the calculation efficiency is increased.
Example 2
In correspondence with the above-described method embodiments, the present embodiment provides a computing system of an annular fuel assembly, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above-described method when executing the computer program.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method of calculating an annular fuel assembly, comprising the steps of:
s1: dividing the annular fuel assembly by taking an annular fuel rod as a unit, distinguishing all parts of the annular fuel rod, and distributing corresponding calculation modules for the parts of the annular fuel rod;
s2: analyzing the calculation relation among the calculation modules in the step S1, and if the calculation results of the two calculation modules influence each other, considering the two calculation modules as associated calculation modules, otherwise, as mutually independent calculation modules;
s3: performing serial calculation on the calculation modules which are related to each other, performing parallel calculation on the calculation modules which are independent of each other until the performance of each part of the annular fuel rod is calculated, and performing parallel calculation on all the fuel rods;
each component of the annular fuel rod comprises a pellet (4), an inner gap (2) arranged on the inner side of the pellet (4), an outer gap (3) arranged on the outer side of the pellet (4), an inner cladding (5) arranged on the inner side of the inner gap (2), an outer cladding (6) arranged on the outer side of the outer gap (3), a coolant inner runner (7) arranged on the inner side of the inner cladding (5) and a coolant outer runner (8) arranged on the outer side of the outer cladding (6);
the computing module includes: the device comprises an axial power distribution calculation module, a burnup and burnup increment calculation module, a nuclide distribution calculation module, a radial power distribution calculation module, a core package temperature distribution calculation module, a mechanical calculation module, a cladding oxidation calculation module, a cladding hydrogen absorption calculation module and an internal pressure calculation module;
wherein the shell oxidation calculation module, the shell hydrogen absorption calculation module and the internal pressure calculation module are mutually independent calculation modules; the axial power distribution calculation module, the burnup increment calculation module, the nuclide distribution calculation module, the radial power distribution calculation module, the core package temperature distribution calculation module and the mechanical calculation module are associated calculation modules;
the performance calculation of the annular fuel rod comprises the steps of calculating the distribution condition of the core package temperature by adopting a core package temperature distribution calculation module and calculating the mechanical performance by adopting a mechanical calculation module.
2. The method of calculating an annular fuel assembly according to claim 1, wherein in S1, when the number of annular fuel rods included in the annular fuel assembly is greater than a set number, the annular fuel assemblies are grouped and then the annular fuels of each group are calculated in parallel.
3. A computing system for an annular fuel assembly comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of the preceding claims 1 to 2 when the computer program is executed by the processor.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5638413A (en) * | 1994-06-21 | 1997-06-10 | Kabushiki Kaisha Toshiba | Apparatus and method for estimating core performance |
| CN108256212A (en) * | 2018-01-16 | 2018-07-06 | 中南大学 | More bar fuel element parallel performance analysis methods, system and storage medium |
| CN108806810A (en) * | 2018-06-15 | 2018-11-13 | 中国原子能科学研究院 | Nuclear fuel rod method for analyzing performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2287853B1 (en) * | 2009-08-18 | 2012-10-03 | Areva NP | A computer implemented method for modelling a nuclear reactor core and a corresponding computer program product |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5638413A (en) * | 1994-06-21 | 1997-06-10 | Kabushiki Kaisha Toshiba | Apparatus and method for estimating core performance |
| CN108256212A (en) * | 2018-01-16 | 2018-07-06 | 中南大学 | More bar fuel element parallel performance analysis methods, system and storage medium |
| CN108806810A (en) * | 2018-06-15 | 2018-11-13 | 中国原子能科学研究院 | Nuclear fuel rod method for analyzing performance |
Non-Patent Citations (2)
| Title |
|---|
| "液态金属冷却快堆燃料元件的性能分析程序开发及应用";齐飞鹏;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20181215(第12期);C040-6 * |
| "燃料棒性能分析软件FRIPAC评估";张斌 等;《原子能科学技术》;20181221;第53卷(第5期);第869-875页 * |
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