Leakage abnormity processing system and method for main pump of nuclear power station

Abstract

The invention relates to the technical field of nuclear power station primary loop main pumps. The invention discloses leakage abnormity processing system and method for a main pump of a nuclear powerstation. The system comprises a main controller, a nuclear power station main pump and a liquid collection tank, wherein the nuclear power station main pump comprises a second shaft seal and includesa leakage pipeline which is used for connecting the second shaft seal with the liquid collecting tank; an impurity isolation valve is arranged on the side, close to the second shaft seal, of the leakage pipeline. At least one water filling isolation valve is arranged on the leakage pipeline between the impurity isolation valve and the liquid collection tank; the liquid collecting tank is providedwith a water supplementing isolating valve used for controlling reverse water filling and exhausting, and the main controller is used for controlling the water supplementing isolating valve and at least one water filling isolating valve to be opened when the impurity isolating valve is closed, so that reverse water filling and exhausting can be conducted on the leakage pipeline through the liquidcollecting tank. According to the system, the liquid collection tank can be used for fully and reversely filling water into the leakage pipeline for exhausting, and meanwhile, impurities in the liquid collection tank can be isolated through the impurity isolation valve.

Description

technical field [0001] The invention relates to the technical field of a main pump of a primary circuit of a nuclear power plant, in particular to a system and method for handling abnormal leakage of a main pump of a nuclear power plant. Background technique [0002] The No. 2 shaft seal of the 100 type main pump is a friction surface type shaft seal, which consists of a graphite-coated stainless steel static ring and a stainless steel moving ring with a sprayed chromium carbide coating that rotates with the shaft, such as figure 1 shown. The function of the No. 2 shaft seal is to block the leakage water of the No. 1 shaft seal and guide it to flow back to the RCV (Chemical and Volume Control System) system. The static ring is pressed against the moving ring by liquid pressure and spring force, and the friction surface between the moving and static rings is lubricated and cooled by a small part of the leakage flow of the No. 1 shaft seal. The normal leakage through the No....

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a system and method for abnormal leakage of the main pump of a nuclear power plant to solve the problem of simply realizing the sufficient exhaust of the leakage pipeline of the No. 2 shaft seal of the main pump

Images