A 3D Transient Performance Analysis Method for Supercritical Water Reactor Core

Abstract

The invention discloses a three-dimensional transient performance analysis method of a supercritical water reactor core, which includes: step 1: performing core steady-state calculation, providing power parameters and thermal parameters, performing iterative coupling calculation until the core steady-state power parameters and Convergence of thermal parameters; Step 2: Provide core initial state and component section library; Step 3: Perform transient calculation, provide power parameters and thermal parameters, perform iterative coupling calculation until core transient power parameters and thermal parameters converge ; Step 4: Get the fine power distribution of the cell scale of the thermal component, analyze the sub-channels of the thermal component, and finally give the key parameters of the safety evaluation; Step 5: Determine whether the key parameters of the safety evaluation exceed the corresponding transient or accident safety limits value, which can accurately describe the feedback between physics and thermal-hydraulic, provide a more accurate three-dimensional power distribution of the core, and truly simulate the technical effects of the transient process and accident process of supercritical water reactors.

Description

technical field [0001] The invention relates to the field of nuclear reactor design research, in particular to a three-dimensional transient performance analysis method for a supercritical water reactor core. Background technique [0002] The operating condition of the supercritical water reactor (SCWR) is above the thermodynamic critical point of water (374°C, 22.1MPa), the thermal efficiency of the system is high, and the economy is good, but at the same time, compared with the conventional water-cooled reactor, the operating parameters of the supercritical water reactor The core structure and coolant flow are relatively complex, which brings a lot of technical problems such as core physics, thermal-hydraulic and safety analysis. Among them, the strong nuclear thermal coupling characteristic is the core design and core of supercritical water reactor. One of the key technical problems of performance analysis. [0003] Among the abnormal reactivity events of supercritical w...

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Problems solved by technology

[0007] The invention provides a three-dimensional transient performance analysis method for supercritical water reactor core, which solves the problem that the existing supercritical water reactor power distribution transient analysis method does not have the ability to calculate three-dimensional power coupled with core core heat, and it is difficult to real or Accurately simulate the technical problems of transient processes such as reactivity and abnormal power distribution events, realize the accurate description of the feedback between physics and thermal-hydraulic, provide more accurate three-dimensional power distribution of the core, and truly simulate supercritical Transient Process of Water Reactor and Technical Effect of Accident Process

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