Method for designing axial travelling wave reactor starting area

A design method and technology of traveling wave reactor, applied in the field of start-up area structure of axial traveling wave reactor, can solve the problems of constant core reactivity and fluctuation of core reactivity, etc., to facilitate fuel management, maintain multiplication and The effect of consumption

Inactive Publication Date: 2014-09-03
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a design method applied to the start-up area of ​​an axial traveling wave reactor, which solves the current problem that the core reactivity fluctuates greatly during the whole life, and achieves that the core reactivity is basically unchanged during the whole life. Change, important physical parameters such as neutron fluence rate distribution, power distribution, nuclide distribution and other shapes do not change but propagate in the axial direction at a certain speed

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  • Method for designing axial travelling wave reactor starting area
  • Method for designing axial travelling wave reactor starting area
  • Method for designing axial travelling wave reactor starting area

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Embodiment

[0026] Such as Figures 1 to 5 The principle diagram shown is a design method of the start-up area of ​​an axial traveling wave reactor according to the present invention. A core of an axial traveling wave reactor has been designed by using this method and has achieved remarkable results. The specific design scheme of the start-up area is as follows:

[0027] (a) The calculation found that after the important physical parameters of the axial traveling wave reactor, such as the axial power distribution, etc. are stabilized, the axial span is about 320cm, and the length of the start-up area is about the same as the span of the important physical parameters after stabilization, which is also taken as 320cm;

[0028] (b) In order to keep important physical parameters such as the shape of axial power distribution unchanged from the beginning of stacking to the end of its life, the stacking area is designed to be segmented in the axial direction. The smallest unit is 5cm, and each se...

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Abstract

The invention discloses a method for designing an axial travelling wave reactor starting area. The method comprises the following steps: (a) setting the length of the reactor starting area; (b) axially dividing the reactor starting area; and (c) setting the nuclear density of each axial section of the reactor starting area. According to the reactor starting area designed by the method, after an axial travelling wave reactor stably runs, fuel compositions in each axial section of a main combustion area are quite complicated and comprise fissionable nuclide, fissile nuclide and fission products. Particularly, the fission products affect reactor core reactivity and power distribution greatly due to the difference of kinds and content of the fission products. The four fuels are adopted, so that the combustion condition can be simulated, and the whole power can be regulated by adjusting the content of each composition.

Description

technical field [0001] The invention relates to the start-up area structure of an axial traveling wave reactor, in particular to a design method for the start-up area of ​​an axial traveling wave reactor. Background technique [0002] The fundamental starting point of the axial traveling wave reactor is that the fuel consumption of the reactor advances from one end to the other at a certain speed in the axial direction, and at any moment in the lifetime of the reactor, the reactivity and axial power distribution shape of the reactor are basically unchanged. During the operation of the axial traveling wave reactor, the core is divided into three areas in the axial direction: the spent fuel area, the main combustion area, and the fresh fuel area. The main combustion area is enriched fuel, the neutron fluence rate is much higher than the other two areas, and it is the main energy source of the core; the new fuel area can be loaded with natural uranium, depleted uranium, or spen...

Claims

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Application Information

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IPC IPC(8): G21C21/00
CPCY02E30/30
Inventor 孙伟王连杰夏榜样李庆
Owner NUCLEAR POWER INSTITUTE OF CHINA
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