Orientated measurement shielding apparatus of complex dose field of nuclear power plant

Abstract

The invention, which belongs to the field of collimation equipment of a radiation detector, particularly relates to an orientated measurement shielding apparatus of a complex dose field of a nuclear power plant. The orientated measurement shielding apparatus comprises a first arc surface and a second arc surface, wherein one side of the first arc surface and one side of the second arc surface areconnected mutually to shield radioactive rays in a complex dose field of a nuclear power plant; the other sides of the first arc surface and the second arc surface are not in contact to form an alignment incident slot; and the radioactive rays can be detected by a cylindrical probe of a detector encircled by the first arc surface and the second arc surface through the alignment incident slot. In addition, the orientated measurement shielding apparatus also includes a scale window that is arranged on the first arc surface or the second arc surface and is capable of reading the probe position directly. When the shielding apparatus is installed on the probe of the portable detector, orientated measurement of specified radioactive equipment is realized while functions of the existing portabledetector of the nuclear power plant are not affected, so that a problem of orientated measurement in the complex gamma dose field is solved.

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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