Ray monitoring device, monitoring method, monitoring system and storage medium

Abstract

The embodiment of the invention provides a ray monitoring device, a ray monitoring method, a ray monitoring system and a storage medium. The detector unit is arranged in the shielding body, and a probe of the detector unit is located in the collimation shielding body of the shielding body; and the attenuation device is arranged at the opening of the collimation shielding body and is used for controlling the number of rays entering the opening of the collimation shielding body. According to the embodiment of the invention, the detector is arranged in the shielding body, and the number of rays entering the opening of the collimation shielding body is controlled through the attenuation device, so that the detection precision is improved, and the accuracy of fuel element damage on-line monitoring is ensured.

Description

technical field [0001] The invention relates to a radiation monitoring device, a monitoring method, a monitoring system and a storage medium. Background technique [0002] The fuel element is the heart of the nuclear reactor. Once the fuel element is damaged, a large amount of radioactive fission products will enter the primary circuit coolant and quickly fill the entire circuit, which will greatly increase the radioactive level of the primary circuit system and directly affect the operational safety and radiation of the reactor. Safety. [0003] All reactors need to monitor the radionuclides in the primary loop system. The most suitable monitoring method is online direct measurement, by monitoring the activity concentration of key fission nuclides or the ratio of certain key nuclides in the primary loop coolant The value changes, and the size of the fuel element breach and the location of the damage can be determined. [0004] Under normal circumstances, the on-line monit...

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Problems solved by technology

[0004] Under normal circumstances, the on-line monitoring of fuel element damage has a high level of background radiation and large interference, and the detection of key fission nuclides in the primary coolant is also affected by activation corrosion products, neutron activation products of coolant, and annihilation radiation. , characteristic X-rays of shield material lead and the influence of Compton effect

When the fuel element is damaged, a large amount of fission nuclides are released into the system, and the γ-ray emitted by the detection target is several orders of magnitude higher than that under normal working conditions. At this time, a large amount of γ-ray enters the detector, causing the detector The dead time also affects the detection accuracy

Usually the fuel element damage on-line monitoring system includes a shielding collimation device, but basically has a single function, especially the collimation part cannot meet the requirements of the external environment radiation field transformation

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