Installation method of nuclear power station seawater liquid level measuring instrument

Abstract

The invention discloses an installation method of a nuclear power station seawater liquid level measurement instrument, and the method comprises the following steps of: S1, arranging a measurement pit on an installation platform at the top of a pool according to a measurement position, and forming a hole communicated with the pool in the measurement pit; S2, positioning a protection guide pipe below the hole and communicating the protection guide pipe with the hole relatively ; S3, lowering a cable of the liquid level measurement instrument, and lowering the cable and a probe at the end of the cable into the protection guide pipe; and S4, placing a joint of the liquid level measurement instrument in the measurement pit, and fixing the joint at the opening of the hole. According to the installation method of the nuclear power station seawater liquid level measurement instrument, the probe and the cable are protected through the protection guide pipe, and the probe is prevented from drifting and colliding with other objects due to long-term impact of water flow or other substances to result in that the instrument is inaccurate in measurement or damaged, meanwhile, the cable connected with the probe is prevented from being damaged by long-term gravity traction of the probe.

Description

technical field [0001] The invention relates to the technical field of installation of nuclear power instruments, in particular to a method for installing a seawater level measuring instrument of a nuclear power plant. Background technique [0002] For liquid level measurement, differential pressure, electromagnetic, etc. methods are generally used for measurement, or methods without contact with the medium (such as ultrasonic, electromagnetic, etc.) measurement. In nuclear power plants, the instruments installed in the pump room to measure the liquid level of the seawater forebay and the liquid level before and after the drum filter screen, due to the implementation of safety-related functions, need to use K3 certified instruments, non-contact instruments cannot meet this requirement . For the measurement of the liquid level of the seawater forebay and the liquid level before and after the drum filter, the measurement position and the actual situation of the site cannot be...

AI Technical Summary

Problems solved by technology

In nuclear power plants, the instruments installed in the pump room to measure the liquid level of the seawater forebay and the liquid level before and after the drum filter screen, due to the implementation of safety-related functions, need to use K3 certified instruments, non-contact instruments cannot meet this requirement

For the measurement of the liquid level of the seawater forebay and the liquid level before and after the drum filter, the measurement position and the actual situation of the site cannot be measured by the differential pressure method.

Images