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Transient safety analysis method for one-dimensional lead-based system

A safety analysis, lead-based technology, applied in the direction of nuclear power generation, climate sustainability, computer-executed nuclear control, etc., can solve the problems that the lead-bismuth reactor cannot be modeled, the system calculation program cannot capture and explain, and achieve calculation The effect of high reliability

Active Publication Date: 2022-02-08
XI AN JIAOTONG UNIV
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Problems solved by technology

However, these programs cannot be directly used to model lead-bismuth reactors due to the large difference between the flow and heat transfer characteristics of lead-bismuth alloys and conventional fluids such as water
[0003] In the lead-bismuth reactor, there are some unique thermal-hydraulic phenomena, which cannot be captured and explained by traditional system calculation programs

Method used

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  • Transient safety analysis method for one-dimensional lead-based system
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  • Transient safety analysis method for one-dimensional lead-based system

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Embodiment Construction

[0025] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0026] like figure 1 As shown in the present invention, a method for coupled analysis of physics and thermal engineering of a pebble bed reactor of a space nuclear power propulsion system, the steps are as follows:

[0027] Step 1: The user writes and configures the input file according to the organization structure and component parameters of the simulated lead-bismuth experimental bench, the total time and time step of the simulation calculation, and the key thermal parameters and transient conditions of the simulation calculation. According to the information in the input file, the lead-bismuth experimental bench is regarded as an organic combination of several components, and each component is divided into several control bodies along the radial direction according to the requirements.

[0028] Step 2: According to ...

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Abstract

The invention discloses a transient safety analysis method for a one-dimensional lead-based system. The method mainly comprises the following steps: 1, determining an organization structure of the lead-based system and component parameters of each component forming a rack according to an input file, and setting calculation time and time step length; 2, carrying out system initialization calculation to obtain an initial value at zero time; and 3, calculating the flow field, the temperature field and the pressure length at the current t moment by adopting a Gille algorithm; 4, according to a calculation result in the step 3, performing calculation at the next moment by adopting a Gille algorithm, and stopping calculation until the set total calculation time; 5, if the calculation reaches the specified time, ending the calculation; and 6, calculating distribution of oxygen concentration, iron concentration and oxide layer concentration in the rack by adopting a quasi-steady-state method according to calculation results obtained in the steps 1-5. According to the method, the steady-state thermal hydraulic characteristics of the lead-bismuth fast reactor or the lead-based system and the transient corresponding characteristics under the accident condition can be analyzed, and suggestions and guidance are provided for promoting design and safety characteristic analysis of the lead-bismuth fast reactor.

Description

technical field [0001] The invention designs the field of advanced reactor design, in particular to a transient safety analysis method of a lead-bismuth reactor and a lead-bismuth test system. Background technique [0002] With the advancement of nuclear energy technology, the concept of the fourth generation reactor came into being. As one of the fourth generation reactors, lead-bismuth reactors have all the characteristics of natural circulation capability and high-neutron economy, which have attracted extensive attention from the academic circles. When designing and researching lead-bismuth reactor systems, enough attention should be paid to the transient safety of lead-bismuth reactors. For traditional reactors such as pressurized water reactors, some system calculation programs have appeared, such as RELAP, TRAC, etc. However, these procedures cannot be directly used to model lead-bismuth reactors due to the huge difference between the flow heat transfer properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21D3/00
CPCG21D3/001G21D3/005Y02E30/00Y02E30/30
Inventor 王成龙王琛张衍秋穗正苏光辉田文喜
Owner XI AN JIAOTONG UNIV
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