Radioactive activity monitoring device and method for water in nuclear power plant discharge closed conduit

Abstract

The invention belongs to the technical field of radioactive activity monitoring. The invention particularly relates to a radioactive activity monitoring device and method for water in a nuclear powerplant drainage closed conduit. The device comprises a detector, a temperature sensor, a processing module, an interface module, a data acquisition module and a console, wherein the temperature sensoris fixedly installed on the detector, the detector and the temperature sensor are connected with the processing module, the other end of the processing module is connected with the interface module, the other end of the interface module is connected with the data acquisition module, and the other end of the data acquisition module is connected with the console. The isolation device is added to completely isolate the detector from seawater, so that the maintenance cost is reduced; the isolation device with low influence on detection efficiency is selected, the detection efficiency is improved by 5%, a temperature sensor is added, temperature compensation correction is realized by using an algorithm through a control processing module, and the problem of detector temperature drift is solved.

Description

technical field [0001] The invention belongs to the technical field of radioactive activity monitoring, and in particular relates to a radioactive activity monitoring device and method for discharging water in an underground ditch of a nuclear power plant. Background technique [0002] The important user process water system of the nuclear power plant is mainly used for exporting heat from the heat exchanger of the cooling circuit heat exchanger of the important nuclear island equipment in the primary circuit of the nuclear power plant to the final heat sink (in seawater) and providing water supply for the automatic fire sprinkler system of the power plant, which belongs to the safety of the nuclear power plant. important system. The safety-important plant water process system draws water from the sea, and the seawater enters the inlet water chamber after filtration and purification. The four important user process water loops are pumped from the inlet water chamber by the p...

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Problems solved by technology

[0006] The object of the present invention is to provide a new type of radioactivity monitoring device and method for the water in the culvert of the nuclear power plant to solve the problem that the detector intruded into the water is easily damaged by the impact and shaking of the fast water flow and the detection of radioactive sources. There is a risk of radioactive accidents caused by the detector falling into the sea, divers are required to carry out high-risk underwater operations, seawater is easy to make the detector cover grow sea oysters, which affects the detection efficiency and increases the difficulty of regular maintenance, and requires high sealing of the detector cover , the impact of water temperature changes on the measurement sensitivity of the detector, etc., while saving maintenance costs

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