High-order transport correction method and system for pressurized water reactor plate fuel

Abstract

The application discloses a high-order transport correction method and system based on a pressurized water reactor plate fuel, and comprises the following steps: obtaining initial self-scattering cross sections to high-order self-scattering cross sections in the same energy group of the pressurized water reactor plate fuel; obtaining an effective multiplication factor according to a preset weight through an OSC correction method and a power iteration method based on the initial self-scattering cross sections to the high-order self-scattering cross sections; calculating a reference weight according to the preset weight and the effective multiplication factor; and finally, correcting transport cross sections and self-scattering cross sections of the pressurized water reactor plate fuel through the OSC correction method based on the reference weight and the initial self-scattering cross sections to the high-order self-scattering cross sections. The application adopts a Monte Carlo method to obtain high-precision high-order scattering cross sections, and introduces a calibratable weight coefficient to correct the self-scattering cross sections in a physical driving mode; the corrected cross sections are input into a characteristic line method transport solver to obtain neutron flux distribution closer to a real physical field, thereby guaranteeing the safety and reliability of reactor design and operation.

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