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DDET and RELAP5 coupled dynamic characteristic analysis method based on auxiliary variable method

A technology of auxiliary variables and dynamic characteristics, which is applied in the field of dynamic characteristic analysis coupled with DDET and RELAP5, to achieve the effects of reducing the dependence on experience and judgment, improving the efficiency of coupling analysis, and wide applicability

Active Publication Date: 2021-06-29
HARBIN ENG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above problems and overcome the shortcomings of the single deterministic safety analysis and probabilistic safety evaluation of traditional nuclear power plants, the present invention provides a system dynamic characteristic analysis method based on auxiliary variable method DDET and RELAP5 program coupling, the analysis method can be Realize the independent coupling of the Dynamic Event Tree (DET) method with the deterministic safety analysis program RELAP5 / MOD4.0, obtain the dynamic characteristics of the nuclear power plant accident conditions more scientifically, and then analyze the nuclear power plant accident conditions The impact of random failures of systems, equipment or personnel on safety characteristics, reducing the conservatism in traditional analysis methods, can provide decision support for the design, operation and management of nuclear power plants, thereby improving the safety and economy of nuclear power plants; and the analysis The method is also applicable to the safety analysis of other complex systems utilizing the RELAP5 program

Method used

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  • DDET and RELAP5 coupled dynamic characteristic analysis method based on auxiliary variable method
  • DDET and RELAP5 coupled dynamic characteristic analysis method based on auxiliary variable method
  • DDET and RELAP5 coupled dynamic characteristic analysis method based on auxiliary variable method

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Embodiment

[0085] Based on the above-mentioned technical scheme, the concrete realization process of step S2-step S7 is as follows:

[0086] Such as image 3 As shown, the symbols shown in the figure are defined as follows:

[0087] BloNum: RELAP5 retroactive restart information block number calculated according to the minimum TRIP trigger time TRIPTimemin of the state transition of the DET simulation object;

[0088] CpuTimemax: the maximum simulation step time of the CPU in the time control card of the RELAP5 program input card;

[0089] ErrNum: RELAP5 abnormal termination count;

[0090] MT: the state transition task time of the running state transition DET simulation object;

[0091] NorNum: RELAP5 normal time termination count;

[0092] ResFre: the restart frequency of the time control card in the RELAP5 program input card;

[0093] ResNum: the RELAP5 restart number corresponding to the RELAP5 backtracking restart information block number BloNum;

[0094] SimTime: the simulation...

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Abstract

The invention discloses a DDET and RELAP5 coupled dynamic characteristic analysis method based on an auxiliary variable method. The method comprises the following steps: constructing a DET simulation model of a discrete dynamic event tree, and modifying a TRIP card of an RELAP5 program input file according to a DET simulation object state transition type in a manner of adding auxiliary TRIP variables; the simulation time of the RELAP5 program is set, the step length of the simulation time of the RELAP5 program is controlled, and an output result file of each simulation step length of the RELAP5 program is analyzed; According to the DET simulation object state transition type, backtracking and executing the RELAP5 program. The method has the advantages that the setting process and method of the DET state transition object TRIP in the RELAP5 program input file needed by DET and RELAP5 program coupling are simplified, the modeling complexity is reduced, and the analysis efficiency is improved.

Description

technical field [0001] The invention relates to the field of nuclear power plant safety analysis, in particular to a dynamic characteristic analysis method coupled with DDET and RELAP5 based on an auxiliary variable method. Background technique [0002] Traditional nuclear power plant safety analysis methods include deterministic safety analysis methods and probabilistic safety assessment methods; among them, deterministic safety analysis methods generally use RELAP5 and other software; probabilistic safety assessment methods are based on traditional event tree / fault tree methods. The traditional single deterministic and probabilistic methods have limitations in analyzing the dynamic characteristics of nuclear power plant accidents. For example, the results of the case analysis of nuclear power plants carried out by the French Electricity Group show that the traditional analysis methods are not effective in estimating the radioactive release caused by severe accidents in nucl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06F30/20G06Q50/06
CPCG06Q10/06393G06F30/20G06Q50/06Y02E60/00
Inventor 王贺徐安琪刘子寅汪良军陈浩尹陈思娟孙大彬
Owner HARBIN ENG UNIV
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