Shielding device for directional measurement of complex dose field in nuclear power plant

Abstract

The invention belongs to the field of radiation detector collimation equipment, and specifically relates to a complex dose field directional measurement shielding device of a nuclear power plant, which includes a first circular arc surface and a second arc surface connected to each other on one side and capable of shielding radioactive rays in the complex dose field of the nuclear power plant. Two arc surfaces, the other side of the first arc surface and the second arc surface are not in contact with each other, forming a collimated incident slit, and the radioactive rays can be passed through the collimated incident slit by the first arc surface and the second arc surface The surrounding cylindrical probe of the detector detects, and also includes a scale window that can directly read the position of the probe, which is arranged on the first arc surface or the second arc surface. Adding the shielding device to the probe of the portable detector can realize directional measurement of specific radioactive equipment without affecting the function of the existing portable detector of the nuclear power plant, and solve the problem of directional measurement in the complex gamma dose field.

Description

technical field [0001] The invention belongs to the field of collimation equipment for radiation detectors, and in particular relates to a complex dose field directional measurement shielding device for a nuclear power plant. Background technique [0002] There are many complex radiation dose fields in each building of a nuclear power plant. [0003] There are many radioactive systems in nuclear power plants, which are distributed in various workshops of the power plant. The radioactive substances in nuclear power plants are produced in the core, including fission products produced by nuclear fuel combustion and activated corrosion products produced by the activation of reactor internals after corrosion. The radioactive substances are brought to the various systems of the power plant by the primary coolant, and flow through or deposit in each system, causing the equipment of these systems to generate radioactivity. The main radioactive systems in nuclear power plants inclu...

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Problems solved by technology

[0017] The purpose of the device of the present invention is to form a collimation shield for the probe of a portable detector when a certain radioactive equipment needs to be measured in a complex dose field of a nuclear power plant, to effectively shield the radioactive rays of irrelevant equipment, and to solve the problem of current nuclear power plants. Difficult to achieve directional measurement in the complex dose field of the plant

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