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A Calculation Method for Burnup of Non-fuel Burnable Poison 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: 2017-02-01
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • 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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  • A Calculation Method for Burnup of Non-fuel Burnable Poison in Reactor
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  • A Calculation Method for Burnup of Non-fuel Burnable Poison 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 method for calculating the burnup consumption of non-fuel burnable toxic substances in a reactor, including (a) calculating the total input power for the burnup consumption in the reactor; (b) allocating the power and flux of each burnup area; The constant power fuel consumption calculation is adopted for the zone, and the constant flux fuel consumption calculation is performed for the non-fuel combustible poison zone. The present invention adopts the mixed fuel consumption calculation mode based on the Monte Carlo method: for the fuel area, the fuel consumption in the constant power mode is adopted; for the ultra-low power areas such as non-fuel combustible poisons and thorium bases, the fuel consumption in the constant flux mode is adopted; the invention The scope of application of the burnup calculation based on the Monte Carlo method has been expanded, and the calculation of the burnup calculation including non-fuel combustible poisons, thorium-based and other ultra-low power areas can be handled; the invention does not increase the amount of calculation, and avoids unnecessary approximations , directly calculate the fuel consumption according to the actual power level, which ensures the reliability of the fuel consumption depth.

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 Patents(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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