Groundwater numerical simulation-based radioactivity monitoring well laying method

Abstract

The invention belongs to the field of radiation and environment protection and radiation environment monitoring, and particularly relates to a groundwater numerical simulation-based radioactivity monitoring well laying method. The method comprises the steps of S1, prospecting and measuring hydrogeologic data of a simulated region; S2, performing numerical simulation calculation by using a finite difference method through utilizing a Darcy law and a mass conservation law to obtain a distribution status of a numerically simulated groundwater flow field of the simulated region; S3, performing calibration on a water level and a water equilibrium quantity of the numerically simulated groundwater flow field; S4, repeating the steps S2 and S3 for multiple times to obtain a distribution map of the numerically simulated groundwater flow field of the simulated region; S5, determining a possible migration path of radionuclide passing through groundwater according to the distribution map of the numerically simulated groundwater flow field; and S6, selecting a key position of the possible migration path to lay a groundwater radioactivity monitoring well. According to the method, the blindness of a conventional method is avoided and the groundwater radioactivity monitoring work of a nuclear plant can be effectively finished.

Description

technical field [0001] The invention belongs to the fields of radiation protection and environmental protection and radiation environment monitoring, and in particular relates to a radioactive monitoring well layout method based on groundwater numerical simulation. Background technique [0002] Under the accident conditions of nuclear power plants or certain events, such as the rupture of the waste liquid storage tank combined with the damage of the sealing of the plant, the rupture of the underground waste liquid conveying pipe trench, etc., the released radioactive waste liquid may enter the groundwater below the plant site. Due to the concealment of groundwater, the impact is not easy to be detected, and it may become a potential way of radioactive pollution. In order to reduce the risk of environmental impact as much as possible, it is necessary to monitor the impact of radionuclides through groundwater for normal operation, accident and accident conditions, so as to pro...

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Problems solved by technology

[0003] At present, the monitoring of radionuclides in groundwater by domestic nuclear power plants is still in its infancy, mainly including some water wells set up to detect water levels in the early stage of construction and some exploration wells around the nuclear island area. The locations of these monitoring wells are either too scattered or too Concentration, high consumption costs, and the normal operation of the nuclear power plant and the possible path of nuclide migration after the accident are not considered, and there is a lack of good theoretical analysis and calculation methods, so it is impossible to efficiently complete the radioactivity monitoring task of the groundwater of the nuclear power plant

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