Calculation method for non-fuel burnable poison burn-up in reactor

A calculation method and reactor technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problems of increased calculation amount, low applicability, inaccurate and reasonable use, etc., to expand the scope of application and ensure reliability The effect of confidence

Active Publication Date: 2014-09-03
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the current processing method has defects: the two calculation methods cannot be used accurately and rationally, so that the respective defects cannot be avoided, the applicability is low, and the power statistics are not accurate; Normal flux mode, which increases the amount of additional calculations

Method used

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  • Calculation method for non-fuel burnable poison burn-up in reactor
  • Calculation method for non-fuel burnable poison burn-up in reactor
  • Calculation method for non-fuel burnable poison burn-up in reactor

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Embodiment

[0036] Such as figure 1 As shown, the present invention is a calculation method for the burnup of non-fuel burnable poisonous substances in a reactor, aiming at the burnup of the fuel zone and the non-fuel combustible zone in the reactor. The single cell is the implementation object to test the mixed fuel consumption calculation model; 2 The fuel pellet 3 is coated with ZrB 2 Thin film 2, ZrB 2 The outer side of film 2 is the air gap He, and its calculation method is as follows:

[0037] (a) Total input power for burnup calculation in the reactor;

[0038] (b1) The average fission energy produced by each incident neutron in the burnup zone i is:

[0039] (1)

[0040] Where E is the energy generated by each fission of nuclide j, the unit is MJ / fission, and the number of moles of actinide nuclides in each zone is , where n is the nucleon density, V is the volume, NA is Avogadro's constant, and the fission cross section target, of which The fission microscopic cross...

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Abstract

The invention discloses a calculation method for non-fuel burnable poison burn-up in a reactor. The calculation method includes the steps that (a), total power is input for burn-up calculation in the reactor; (b), power and flux of all burn-up regions are distributed; (c), constant power burn-up calculation is adopted for a fuel region, and constant-flux burn-up calculation is adopted for a non-fuel burnable poison region. The mixed burn-up calculation mode based on the Monte Carlo method is adopted; for the fuel region, the constant power mode is adopted for burn-up; for the ultra-low power regions of non-fuel burnable poison, thorium-base fuel and others, the constant-flux mode is adopted for burn-up. The application range of burn-up calculation based on the Monte Carlo method is enlarged, and the method can be used for performing processing including burning calculation on the ultra-low power regions of the non-fuel burnable poison, the thorium-base fuel and others. The calculation amount is not added, so that unnecessary approximation is avoided, burn-up calculation is performed directly according to the actual power level, and the confidence coefficient of the burn-up level is guaranteed.

Description

technical field [0001] The invention relates to the burnup calculation setting of combustible poisons and new fuels in a reactor, in particular to a calculation method for the burnup of non-fuel combustible poisons in a reactor. Background technique [0002] The burnup calculation based on the Monte Carlo method has two modes of constant power or constant flux, and the fuel consumption calculation is generally performed according to the input rated power in the reactor. However, various burnable poisons may be used in the core: they can be divided into dispersed type, coated type and separated type, and the latter two types do not contain fuel, so they can be called non-fuel burnable poisons; There is almost no power in the burn-up zone, so this type of burnable poison cannot be burned up in the constant power mode. In addition, some fuel areas in the new core, such as the thorium-based fuel used for breeding, do not contain fissile nuclides at the beginning of the life, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 强胜龙姚栋于颖锐柴晓明刘晓黎
Owner NUCLEAR POWER INSTITUTE OF CHINA
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