Sampling method for tritiated water in air

A technology of tritiated water and air, which is applied in the field of air tritiated water sampling, can solve problems such as the inability to realize the absorbed dose of tritiated water, unsuitable tritiated water, slow water absorption of silica gel, etc., and achieve good cooling effect and convenient tritium measurement , use the lightweight effect

Inactive Publication Date: 2017-06-13
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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Problems solved by technology

However, since tritium enters the human body through the respiratory system and is excreted through the urine through the complex metabolic process of the human body, it is impossible to intuitively and quickly understand the absorbed dose of tritiated water by tritium-related personnel
At present, two "portable tritiated water sampling devices" (publication numbers: CN204422269U and CN103063480A) disclosed in the Chinese patent literature database are designed for fixed-point sampling of tritiated water in the ambient air on site. The volume is

Method used

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  • Sampling method for tritiated water in air
  • Sampling method for tritiated water in air

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Embodiment 1

[0022] Such as figure 1 As shown, the sampling device used in the sampling method for air tritiated water of the present invention includes a cooling fan 1, a semiconductor cooling chip 2, an insulating layer 3, a collection container 4, a temperature sensor 6, and a power air pump 10 arranged in a carrying case. , power supply 11, temperature display 14, flow display controller 15; Its connection relation is, described semiconductor refrigeration sheet 2 and cooling fan 1 are connected with power supply 11 by wire 12, and the heating surface of semiconductor cooling sheet 2 is close to cooling fan 1. The cooling surface of the semiconductor cooling chip 2 is wrapped by the insulation layer 3 shell to form a cooling cavity; the cooling cavity is sealed by a movable cover plate 5, and the movable cover plate 5 reserves a hole; a temperature sensor 6 and a collection container are placed in the cooling cavity 4. The temperature sensor 6 is connected to the temperature display 14...

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Abstract

The invention provides a sampling method for tritiated water in air. A system used by the sampling method comprises a cooling fan, a semiconductor refrigeration sheet, a heat insulation layer, a collection container, a movable cover plate, a hose I, a hose II, a hose III, a power air pump, a power supply, an AC plug, a temperature display, a temperature sensor and a flow display controller. The sampling method comprises the steps of adjusting an intake flow rate equivalent to short-term respiratory volume of a person through the power air pump; pumping tritiated water vapor in air by using a peltier effect of the semiconductor refrigeration sheet; quickly condensing the tritiated water vapor into tritiated water through a coil of the collection container; carrying out volume measurement and liquid scintillation counting on the collected tritiated water; and obtaining the inhalation dose of tritium in air near a respiratory zone of a worker of a tritium-related place according to a calculation formula. The sampling method is suitable for fast sampling of the tritiated water of the air near the worker of the tritium-related place, and is a practical and simple sampling method; and a support can be provided for radiation protection of the worker of the tritium-related place.

Description

technical field [0001] The invention belongs to the technical field of radiation protection and environmental protection, and in particular relates to a sampling method for air tritiated water. Background technique [0002] As one of the important raw materials in the field of nuclear industry and precision weapon production, tritium has the characteristics of beta radioactivity and low toxicity. Among them, the toxicity of tritiated water is more than 10,000 times that of tritium gas. Since tritium is the nuclide with the smallest molecular weight, there is currently no suitable material that can completely protect it. Therefore, the intake of tritiated water by tritium-related workers mainly depends on the tritium content in urine monitored by radiation protection. However, since tritium enters the human body through the respiratory system and is excreted through the urine through a complex metabolic process of the human body, it is impossible to intuitively and quickly ...

Claims

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Application Information

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IPC IPC(8): G01N1/14G01N1/42
CPCG01N1/14G01N1/42
Inventor 董兰成琼马俊格杨勇涂俊穆龙杜阳蔺金贤吴冠银
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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