Leak detection method and differential pressure leak detection system of condenser heat transfer tube in nuclear power plant
A heat transfer tube and condenser technology, which is applied in the field of a heat transfer tube leak detection method and a differential pressure leak detection system for a condenser of a nuclear power plant, can solve the problems of heat transfer tube leakage and inability to determine the condenser, and achieves improved performance. Accuracy and reliability, the effect of improving detection efficiency and detection accuracy
Active Publication Date: 2016-07-06
STATE NUCLEAR POWER PLANT SERVICE
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Problems solved by technology
[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a leak detection method for a heat transfer tube of a nuclear power plant condenser, which is used to solve the problem in the prior art that it is impossible to determine which heat transfer tube of the condenser is leaking
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[0020] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0021] see figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, term...
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The invention provides a method for detecting leakage of a heat-transfer pipe of a condenser in nuclear power plant, under normal operating condition of the condenser, a condenser to be detected is isolated in advance, drain in a condenser water box is introduced below a lowest plane of the heat-transfer pipe, then adjacent heat-transfer pipes are taken as one group in pairs, one heat-transfer pipe positioned at the intermediate part of the adjacent two groups of the heat-transfer pipes is used by the adjacent two groups of the heat-transfer pipes, each group of the heat-transfer pipe enables differential pressure detection; while the differential pressure is detected, one end of the two heat-transfer pipe in same group is respectively connected to the two ends of a differential pressure meter, the other end is sealed, the differential pressure meter is used for detecting and then output the detection value, then each group is successively detected, after the detection is completed, and the heat-transfer pipe which leaks can be distinguished according to all detection value. The method of the invention realizes the detection of the heat-transfer pipe, accurately and rapidly determines the heat-transfer pipe which leaks, and increases the detection efficiency and the detection precision.
Description
technical field [0001] The invention relates to the technical field of leak detection for heat transfer tubes of condensers in nuclear power plants, in particular to a leak detection method for heat transfer tubes of condensers in nuclear power plants and a differential pressure leak detection system. Background technique [0002] Since the material of the heat transfer tube of the condenser is titanium tube, the wall thickness is generally about 0.5mm, and the impurities in the seawater flowing through the heat transfer tube are likely to cause physical damage to the heat transfer tube. A broken tube will cause seawater to leak to the steam side of the condenser under the action of pressure difference. At present, the most conventional method for detecting heat transfer tubes of condensers in nuclear power plants in China is eddy current testing. For the shortcomings of eddy current testing, visual testing and other methods are supplemented, but these methods are not specif...
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IPC IPC(8): G21C17/017
CPCY02E30/30
Inventor 姜伟钱征宇杨炯柏佳磊冯春杰周越峰黄海涛
Owner STATE NUCLEAR POWER PLANT SERVICE