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Portable X-ray irradiation device for field calibration

An irradiation device and on-site calibration technology, applied in the field of ionizing radiation, can solve the problems of limited application, hidden danger of radiation safety for operators, inconvenient disassembly, etc., and achieve the effects of good stability, reduction of hidden dangers of radiation safety, and enhancement of operability

Pending Publication Date: 2020-12-11
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Claims
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Problems solved by technology

The problem with this method is that the inspection period of the instrument is long (usually more than one month), especially for the fixed nuclear emergency X, γ radiation dose (rate) instrument is inconvenient to disassemble, which is not conducive to the continuity of the measurement results of the monitoring point, so the Its radiation monitoring capabilities have a greater impact
In addition, the lifting shutter (or operating lever) of the irradiation device is manually lifted, which will cause certain hidden dangers to the radiation safety of the operator during the process of lifting the radioactive source and removing the lead plug, which limits its application in on-site calibration work

Method used

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  • Portable X-ray irradiation device for field calibration
  • Portable X-ray irradiation device for field calibration
  • Portable X-ray irradiation device for field calibration

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Embodiment Construction

[0041] The invention uses an X-ray tube as a source item for generating a reference radiation field, and designs and manufactures a portable X-ray irradiation device. Such as figure 2 Shown is a schematic diagram of the generation principle of portable filtered X-ray reference radiation. The accelerated electron beam emitted from the cathode bombards the anode target surface, generating bremsstrahlung photons, and at the same time, the bremsstrahlung photons and electron impact ionization ionize the anode target atomic shell electrons to generate characteristic X-rays. The bremsstrahlung photons and the characteristic X-rays jointly constitute the outgoing beam, which passes through the Be window, the beam-limiting diaphragm, and additional filtering to form a cone-shaped portable filtered X-ray reference radiation.

[0042] Based on the above principles, such as figure 1 As shown, a portable X-ray irradiation device designed for on-site calibration in the present invention...

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Abstract

The invention relates to a portable X-ray irradiation device for field calibration, which comprises a moving trolley and an X-ray irradiation device arranged on the moving trolley, and is characterized in that the X-ray irradiation device comprises a shielding box, an X-ray tube arranged in the shielding box, and a three-stage tungsten alloy collimation diaphragm which is arranged on the shieldingbox and corresponds to the X-ray tube, a filter bracket is arranged on one side of the third-stage tungsten alloy collimation diaphragm, a filter plate is arranged on the filter bracket, X-rays generated by the X-ray tube pass through the third-stage tungsten alloy collimation diaphragm and the filter plate and then are emitted out, a translation table assembly is installed between the bottom ofthe shielding box and the top of the moving trolley, a lifting table assembly is installed at the bottom of the translation table assembly, and an angle table is installed on the translation table assembly and installed at the bottom of the shielding box. Compared with an isotope radioactive source used by a portable gamma-ray irradiation device, the X-ray tube adopted by the portable X-ray irradiation device is safer and more convenient in the transportation process, and ionizing radiation is avoided after power failure.

Description

technical field [0001] The invention relates to the field of ionizing radiation, in particular to a portable X-ray irradiation device for on-site calibration. Background technique [0002] Domestic nuclear facilities are equipped with a large number of X and gamma radiation dose (rate) instruments, which play an important role in personnel protection, site radiation level monitoring and environmental radiation level monitoring. The relevant laws of our country require regular verification and calibration of the above instruments to ensure the reliability and traceability of the measurement results. The traditional method is to transport the instruments to the dose supervision department authorized by the state for calibration. The problem with this method is that the inspection period of the instrument is long (usually more than one month), especially for the fixed nuclear emergency X, γ radiation dose (rate) instrument is inconvenient to disassemble, which is not conducive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05G1/02H05G1/30H05G1/56
CPCH05G1/02H05G1/30H05G1/56
Inventor 徐阳高飞
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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