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Method used for simulating movement of radiolysis bubbles in solution reactor

A solution reactor and bubble technology, applied in the field of solution reactors, can solve the problems of the influence of fuel volume and density, the influence of solution reactor steady-state or transient operation, etc., to ensure the effect of computing efficiency

Active Publication Date: 2019-07-09
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0004] The radiolysis bubbles in the solution stack will affect the volume and density of the fuel and bring negative feedback, which will affect the steady-state or transient operation of the solution stack

Method used

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  • Method used for simulating movement of radiolysis bubbles in solution reactor
  • Method used for simulating movement of radiolysis bubbles in solution reactor
  • Method used for simulating movement of radiolysis bubbles in solution reactor

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Embodiment Construction

[0028] The present invention is described in further detail below in conjunction with embodiment.

[0029] If the present invention is used to calculate the steady-state distribution of radiolysis bubbles in the pile at zero time in the solution pile simulation, the following steps will be followed:

[0030] Step 1: The core of the solution reactor is partitioned according to the geometric position, and the power distribution P of each fuel partition is calculated by the neutron transport n , fixing the power distribution.

[0031] Step 2: Divide the radiolysis bubbles into several bubble groups according to the position and time of their generation, and use a matrix to store the information of each bubble group. For the i-th group of bubbles, these information include:

[0032] (a) Initial generation time point t 0i

[0033] (b) Initial generation position h 0i

[0034] (c) The position h of the bubble group at the current time point t i

[0035] (d) The average radius...

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Abstract

The invention belongs to the field of solution reactor, and more specifically relates to a method used for simulating movement of radiolysis bubbles in solution reactor. The method comprises followingsteps: 1, the solution reactor is subjected to geometric partitioning based on the core; 2, radiolysis bubbles are divided into a plurality of bubble groups based on the generation positions and time; 3, from 0 time, calculation is carried out; 4, void fraction VFn of each fuel zone is calculated; 5, radiolysis gas molar total amount n<ntotal> is calculated; 6, generated radiolysis gas is subjected to distribution to complete parameter updating on the bubble groups at t+deta t time; and 7, from 0 time, calculation is carried out continuously based on the process from step 4 to step 6. The adopted method is designed based on a model between a common model wherein only radiolysis bubble axial direction uniform motion is taken into consideration, and a model wherein CFD method is adopted fortwo phase flow simulation of the whole reactor, so that calculation efficiency is ensured with guarantee of a certain precision.

Description

technical field [0001] The invention belongs to the field of solution piles, in particular to a method for simulating the movement of radiolysis bubbles in a solution pile. Background technique [0002] A solution reactor refers to a reactor that uses a fissile fuel soluble brine solution as a fuel. Commonly used fuels include uranyl nitrate aqueous solution, uranyl sulfate aqueous solution, uranyl fluoride aqueous solution or a mixed aqueous solution of these types, and common solid fuels Compared with reactors, the fuel in liquid form and the uniform mixing of moderator and fuel are its most distinctive features. [0003] When the solution stack is operating at power, the high-energy fragments produced by the fission reaction collide with the water molecules in the solution to decompose to produce hydrogen and oxygen; when the uranyl nitrate solution is irradiated, nitrogen and nitrogen oxides will also be produced. These gases are usually collectively referred to as irra...

Claims

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Application Information

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IPC IPC(8): G21G1/02
CPCG06F19/00G21G1/02
Inventor 王帅于颖锐汪量子秦冬蔡云郭锐
Owner NUCLEAR POWER INSTITUTE OF CHINA
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