A simulation method for radiation field dose distribution of decommissioned nuclear facilities

A technology of dose distribution and simulation method, which is applied in design optimization/simulation, biological neural network model, neural architecture, etc., can solve problems such as difficult to use and low calculation efficiency, and achieve the effect of simple steps and calculation of radiation field dose distribution

Active Publication Date: 2020-11-03
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the calculation efficiency of Monte Carlo and point kernel integration methods is low, and it is necessary to use source item data and scene structure information to write input cards for dose calculation. These methods are not easy to use

Method used

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  • A simulation method for radiation field dose distribution of decommissioned nuclear facilities
  • A simulation method for radiation field dose distribution of decommissioned nuclear facilities
  • A simulation method for radiation field dose distribution of decommissioned nuclear facilities

Examples

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Embodiment 1

[0088] A simulation method for calculating and simulating dose distribution of radiation field in decommissioned nuclear facilities such as figure 1 ;Taking an unshielded radiation field as an example, the radiation scene is as follows figure 2 , using the method of the present invention to calculate the dose distribution.

[0089] Step 1: Determine the geometric information of the radiation field to be calculated in the nuclear decommissioning facility scenario, the location of the radiation source and the geometric information of the shielding object.

[0090] It is determined that the top view of the radiation field is a square, and the boundary of the radiation scene is the side length of the square, and the side length is 19m. Radiation space height is 2m. Make sure that the position of the radiation source is at the upper right corner of the radiation field to be calculated, and the radiation source is a cylindrical source.

[0091] Step 2: According to the location ...

Embodiment 2

[0109] A simulation method for calculating and simulating dose distribution of radiation field in decommissioned nuclear facilities such as figure 1 ; Taking a shielded radiation field as an example, the radiation scene is as image 3 , using the method of the present invention to calculate the dose distribution.

[0110] Step 1: Determine the geometric information of the radiation field to be calculated in the nuclear decommissioning facility scenario, the location of the radiation source and the geometric information of the shielding object.

[0111] The top view of the radiation field is a square, and the boundary of the radiation scene is the side length of the square, and the side length is 19. Radiation space height is 2m. Make sure that the position of the radiation source is at the upper right corner of the radiation field to be calculated, and the radiation source is a cylindrical source. The radiation shielding objects are two cuboids, and the shielding material i...

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Abstract

The present invention provides a dose distribution method for retired radiation fields in nuclear facilities.Step 1: Determine the geometric information of the radiation field to be simulated in the scene of nuclear retirement facilities, the location of the radiation source and the geometric information of the shielding object;Used to extract sample data; step 3: According to whether there are shielded objects in the radiation field, the calculation of the dose distribution is divided into partitional dose and not partitional dose calculation; step 4: according to the sample data, build a radial base neural network model; step 5 5; step 5: Calculate the dose value of any point through the anti -distance weight method; step 6: Calculate the dose distribution of the radiation field.The present invention realizes that the radiation source model does not require the radiation source model, and rely on a small amount of dose monitoring point to perform the dose distribution calculation of the radiation field, and the steps are easier; the present invention realizes the dose distribution calculation of the radiation field in the shielding effect.

Description

technical field [0001] The invention relates to a method for calculating and simulating dose distribution of decommissioned radiation fields of nuclear facilities. Background technique [0002] During the development of nuclear energy and nuclear technology, nuclear safety and radiation protection have always been the focus of attention of the whole society. Calculation of radiation dose distribution is the basis of nuclear safety assessment and radiation protection. Radiation dose calculation provides data support for safety assessment and virtual simulation of nuclear radiation environment, and helps reduce radiation damage to workers. [0003] The dose distribution of radiation field is mostly calculated by direct measurement of detectors, Monte Carlo program MCNP and point kernel integral. Direct measurement can obtain higher accuracy, but it may not be able to place detectors in some critical positions and will increase the economic cost. The Monte Carlo program can a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06N3/04
CPCG06F30/20G06N3/048
Inventor 刘永阔李梦堃彭敏俊杨立群
Owner HARBIN ENG UNIV
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