Dose distribution simulating method for nuclear installation decommissioning radiation field

Abstract

The invention provides a dose distribution simulating method for a nuclear installation decommissioning radiation field. The method comprises the steps that firstly, the geometrical information, which needs to be simulated in a nuclear installation decommissioning scene, of the radiation field, the position of a radiation source and the geometrical information of a shielding object are determined; secondly, according to the position of the radiation source and the position of the shielding object, a dose monitoring point distributing network is built and used for extracting sample data; thirdly, according to whether there is the shielding object in the radiation field or not, dose distribution calculation is divided into partitioned dose calculation and non-partitioned dose calculation; fourthly, according to the sample data, a radial basis neural network model is built; fifthly, the dose value of any one point is calculated through an inverse distance weighted method; sixthly, the dose distribution of the radiation field is calculated. By means of the dose distribution simulating method, no radiation source term models are needed, the dose distribution of the radiation field is calculated by depending on a small amount of dose monitoring points, and the steps are simpler. By means of the dose distribution simulating method, the calculation of the dose distribution of the radiation field affecting the shielding effect is achieved.

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...

AI Technical Summary

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

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