Nuclear island temporary pit automatic drainage system and drainage method

Abstract

The invention discloses a nuclear island temporary pit automatic drainage system and drainage method. The system comprises a temporary pit used for accommodating wastewater in a system, a float-type liquidometer used for collecting water-level signals at different heights in the temporary pit, a submersible pump used for pumping out water in the temporary pit, an electronic control unit which is used for receiving the water-level signals at different heights in the temporary pit, performing judgment according to different water levels, sending out start and stop signals of the submersible pump and automatically opening or closing each corresponding submersible pump, and a pipeline assembly which is used for gathering water in the pit and draining out of a safe workshop. The float-type liquidometer and the electronic control unit are arranged on the temporary pit to solve the problem that the submersible pump cannot be started or stopped in time due to not timely response in the prior art, and the nuclear island temporary pit automatic drainage system and drainage method can be used for effectively improving the drainage efficiency and drainage quality, reducing the equipment damage rate, improving the safety coefficient and reducing the use cost.

Description

technical field [0001] The invention relates to the field of water system debugging of nuclear power plants, in particular to an automatic drainage system and drainage method for temporary pits of nuclear islands. Background technique [0002] During the construction of the nuclear island, each system needs to be debugged, and a large amount of wastewater will inevitably be generated during the debugging process. How to discharge the wastewater during the debugging process in a timely and efficient manner is a common problem faced by all systems. [0003] The conventional method is to first set up some temporary pits at the lowest point of the nuclear island plant as a transfer, and drain the water generated during the commissioning process into the pits nearby, and then use a submersible pump to temporarily connect the fire hose to drain the water in the lower pits. Water is pumped outside the plant at a higher point. [0004] However, the above drainage system and method ...

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Problems solved by technology

[0006] The invention aims at low drainage efficiency and drainage quality, high manpower consumption, low safety factor, easy backflow of water from high point to low point when the pump is stopped, and submersible pumps and fire hoses in the prior art. The problem of high damage rate of equipment, etc. provides an automatic drainage system and drainage method for nuclear island temporary pits that can effectively improve drainage efficiency and drainage quality, reduce equipment damage rate, improve safety factor, and reduce use cost.

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