Method and device for measuring water film coverage of containment
A measurement method and technology of water film coverage, applied in the field of reactor safety, can solve the problems of inaccurate and real-time measurement methods, harsh requirements for infrared heat map shooting, and asynchronous water film data acquisition, etc., to achieve small error and high precision High, easy-to-operate effect
Inactive Publication Date: 2018-01-16
TSINGHUA UNIV
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Problems solved by technology
This method has obvious disadvantages, such as large error rate, strict requirements for shooting infrared thermal images, and asynchronous water film data collection, etc.
Others use a cross laser locator to measure the water film coverage. Under a certain experimental condition, the average value of the water film coverage at 6 different heights is calculated. Obviously, the measurement method is also obviously not accurate and real-time.
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[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0032] figure 1 is a flowchart of a method for measuring the water film coverage of a containment vessel according to an embodiment of the present invention.
[0033] Such as figure 1 As shown, the measurement method of the containment water film coverage may include:
[0034] S101, inserting the metal probe of the dot-matrix double-ended capacitance probe into the containment water film to obtain m capacitance values C, where m is a positive integer.
[0035] Specifically, when the metal probe intervenes in the water film, ...
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The invention discloses a measuring method and device for the containment water-film coverage rate. The measuring method includes the steps that metal probe heads of dot-array-type double-head capacitance probes are inserted into a containment water film to obtain m capacitance values C, wherein m is a positive integer; the m capacitance values C are converted into m voltage signals, and the m voltage signals are processed with the threshold value method, and high level 1 and high level 0 are output; the containment water-film coverage rate is judged according to the percentage that the number of the high level 1 accounts for the whole number of the high level 1 and the high level 0. The method is easy to operate and high in anti-interference performance, and is not influenced by the electric conductivity and the temperature of water, and the measuring result which is high in accuracy and small in error is further obtained.
Description
technical field [0001] The invention relates to the technical field of reactor safety, in particular to a method and device for measuring the water film coverage of a containment vessel. Background technique [0002] Large-scale advanced pressurized water reactor is an important reactor type for the development of reactor technology in my country. The application of passive containment cooling system (PCCS) is one of the main features of advanced pressurized water reactor design. This system prevents the containment pressure from exceeding The safety limit, the high pressure or high temperature signal of the containment automatically triggers the action of the isolation valve of the water tank above the containment, and the normal temperature cooling water in the water tank is sprayed to the steel containment after being distributed by the flow distributor. When the cooling water flows from top to bottom along the surface of the containment by gravity, it forms a water film, ...
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IPC IPC(8): G21C17/022
CPCG21C17/022Y02E30/30
Inventor 黄善仿雷兴林郭啸宇
Owner TSINGHUA UNIV