Calculation method, system and terminal of cell homogenization constant considering environmental effects

Abstract

The invention discloses a cell homogenization constant calculation method, system and terminal considering environmental effects, and relates to the field of nuclear reactor core design and reactor physical calculation. The characteristic parameter conservation principle selects the neutronics characteristics of the core; establishes the difference table between the discontinuity factor or the super-homogenization factor and the neutronics characteristics of the core; uses the equivalent The homogenization constant is calculated rod by rod in the core, and the core neutronics characteristic quantity corresponding to the core neutronics characteristic in each cell is obtained; the multidimensional linear interpolation process is performed on the core neutronics characteristic quantity according to the difference table, The cell equivalent homogenization minority group constant is obtained through accurate calculation. The invention effectively weakens the influence of the real environment of the core on the homogenization section caused by total reflection boundary conditions in the calculation process of the uniformization constant of the cell, thereby improving the calculation accuracy of the core by rod.

Description

technical field [0001] The invention relates to the field of nuclear reactor core design and reactor physical calculation, more specifically, it relates to a cell uniformization constant calculation method, system and terminal considering environmental effects. Background technique [0002] The PWR core is generally composed of hundreds of fuel assemblies and complex structural materials such as shrouds / reflectors. Each fuel assembly contains hundreds of different types of cells, such as cells for fuel rods, cells for burnable poison rods, cells for water holes, and so on. On the other hand, the energy distribution of neutrons in a nuclear reactor core ranges from 10 MeV for fission neutrons to 10 MeV for thermal neutrons -2 over a wide range of eV. These two factors make direct calculations for finely described reactors expensive and time-consuming. Restricted by the level of calculation conditions and calculation methods, the one-step calculation of three-dimensional fu...

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Problems solved by technology

[0005] However, as the spatial grid of the core calculation changes from a coarse grid of component homogenization to a fine grid of cell uniformity, and the homogenization area also changes from an optically thick medium to an optically thin medium, the core calculation is becoming more and more complex. Precise and more complex

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