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Space free volume measurement method

A volume measurement and space technology, applied in the field of space free volume measurement, can solve problems such as small space volume, difficulty in actual operation, and impact on accuracy, and achieve the effects of strong operability, good applicability, and high accuracy

Pending Publication Date: 2021-09-07
STATE NUCLEAR POWER PLANT SERVICE
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  • Application Information

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Problems solved by technology

[0004] Among them, the geometric measurement method is very difficult to operate in a space with a complex internal structure, and the accuracy will be greatly affected
The three methods of volume comparison method, flowmeter measurement method, and weighing measurement method are three methods. The injection medium is liquid, which is easy to affect the performance of the internal components of the space. Moreover, when the internal structure of the measured object is complex, there will be problems in filling the entire space with liquid. Certain difficulty, therefore, these three methods have great limitations
The medium of the gas calibration method is gas, but the space measured by this method must be completely closed, and is limited by the standard container, and the volume of the measured space is generally relatively small

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, not to limit the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the inventio...

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Abstract

The invention relates to the technical field of space free volume measurement, in particular to a space free volume measurement method which comprises the following steps: step 1, enabling the pressure boundary of a to-be-measured space to be in a sealed state, and measuring the background concentration C0 of tracer gas in the to-be-measured space; 2, according to the determined tracer gas injection concentration Cin, the determined tracer gas injection flow qin and the determined tracer gas injection time tin, injecting tracer gas into the to-be-measured space; 3, continuously sampling for multiple times according to the determined sampling interval time ts, analyzing the concentration of the tracer gas of the sample, and continuously sampling for at least ten times according to the sampling interval time ts after the diffusion of the tracer gas in the to-be-measured space is confirmed to meet the mixing uniformity condition for the first time; 4, establishing a tracer gas average concentration growth curve according to the tracer gas concentrations of all the samples and the sampling time, and obtaining the tracer gas average concentration in the to-be-measured space; and 5, calculating the free volume Vi of the to-be-measured space. The method has the advantages of high accuracy, strong operability and good applicability.

Description

technical field [0001] The invention relates to the technical field of space free volume measurement, in particular to a space free volume measurement method. Background technique [0002] In the production and scientific research work, there is a problem that the free volume of space needs to be measured. For example, in the habitability test of the main control room of the nuclear power plant, in order to ensure that the staff in the main control room are protected from ultra-safe doses of radiation and other toxic substances under accident conditions For the damage of hazardous substances, it is necessary to accurately measure the free volume of the space for leakage calculation. [0003] For the measurement of free volume, currently commonly used methods include geometric measurement method, volume comparison method, flow meter measurement method, weighing measurement method, gas calibration method, etc. The geometric measurement method is to directly measure the actual...

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Application Information

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IPC IPC(8): G01F17/00
CPCG01F17/00
Inventor 高磊袁会勇孙文彬高钰文柏佳磊常楠黄海涛
Owner STATE NUCLEAR POWER PLANT SERVICE
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