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Radon reduction system for low natural radioactivity level measuring chamber

A technology of level measurement and measurement room, applied in the field of nuclear radiation monitoring, can solve the problem of high indoor radon concentration, achieve the effect of low radon concentration, stable temperature and humidity, and reduce the concentration of radon and radon progeny.

Active Publication Date: 2017-09-29
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
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Problems solved by technology

The existing methods of ventilation and radon reduction are air indoor circulation. The advantage of indoor circulation is that the measured indoor temperature is relatively stable, but the indoor radon concentration is higher than that of the outdoor. The research results at home and abroad generally show that if no radon reduction measures are taken, the indoors of general buildings will The radon concentration will be 3 to 10 times higher than outdoors

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  • Radon reduction system for low natural radioactivity level measuring chamber

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] The structure of the radon reduction system for the low natural radioactive level measurement chamber of the exemplary invention is as follows figure 1 As shown, including high-pressure fan 1, filter adsorption device 2, laboratory 3, shielding body 4, positive pressure maintenance transition room 5, temperature and humidity sensor 6, air inlet 7, transition room door 8, temperature and humidity controller 9, ventilation duct 10. Insulation layer 11, measurement room 12, screen door 13, air outlet 14.

[0028] The measuring room 12 is located in the laboratory 3, and shielding body 4 is arranged on its four side walls, top surface and ground, and a shielding door 13 is arranged on one of the side walls. The shielding body 4 and the shielding door 13 are used for shielding The cosmic rays outside the measurement chamber 12 ...

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Abstract

The invention belongs to the nuclear radiation monitoring technology field and relates to a radon reduction system for a low natural radioactivity level measuring chamber. The radon reduction system comprises the measurement chamber, shielding bodies, a shielding door, air intake equipment, a filtering adsorption device, a ventilation duct, an air inlet and an air outlet, wherein four side walls, the top surface and the bottom surface of the measurement chamber are provided with the shielding bodies, one side wall is provided with the shielding door, ventilation of the measurement chamber is realized by the external air intake equipment through the ventilation duct and the air inlet of which the tail end is connected with the measurement chamber, the air outlet is arranged in the measurement chamber and is used for carrying out air exhaust outwards, air input of the air inlet is greater than air output of the air outlet, and the filtering adsorption device is arranged on the ventilation duct. The radon reduction system is advantaged in that radon concentration and radon daughter concentration can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation monitoring, and relates to a radon reduction system used in a measurement room with low natural radioactivity level. Background technique [0002] The internal irradiation whole body counter is used to measure the content of radionuclides ingested by the human body. According to the measurement results, the committed effective dose in the body of the radioactive worker can be estimated, so it plays an important role in evaluating the personal radiation dose and ensuring the occupational health and safety of the radioactive worker. significance. [0003] An internal whole body counter consists of two essential parts: a detector and a shield. The detector can be scintillation crystal, liquid scintillator or plastic scintillator; the shield can be made of quartz sand, concrete, steel, iron, copper, lead, cadmium, mercury and other materials, generally a combination of several materials. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/02G01T7/04G01T7/00G05D27/02
CPCG01T7/00G01T7/02G01T7/04G05D27/02
Inventor 王丽姣肖文慧陆正文富平夏益华何力华卢瑛
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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