Method for vacuumizing and exhausting reactor primary circuit of pressurized water reactor nuclear power station

Abstract

The invention discloses a method for vacuumizing and exhausting a reactor primary circuit of a pressurized water reactor nuclear power station. The reactor primary circuit of the pressurized water reactor nuclear power station comprises a reactor coolant system main pump, a steam generator, a voltage stabilizer and a reactor pressure vessel which are communicated through a main pipeline. The method comprises the following steps of: extracting gas from the reactor primary circuit until the air pressure of the reactor primary circuit reaches a preset vacuum standard; and supplementing water to the reactor primary circuit until the water level of the reactor pressure vessel at least exceeds the upper surface of the main pipeline. The method for vaccumizing and exhausting the reactor primary circuit of the pressurized water reactor nuclear power station has the advantages of shortening the overhaul time of the pressurized water reactor nuclear power station, effectively reducing the abrasion of the reactor coolant system main pump, reducing the damage risk and maintenance cost of the reactor coolant system main pump, along with higher controllability and success rate of vacuumizing and exhausting.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to a method for vacuuming and exhausting a primary circuit of a pressurized water reactor nuclear power plant reactor. Background technique [0002] like figure 1 Shown is a schematic diagram of the water level elevation and connection relationship of the primary circuit of the medium pressurized water reactor nuclear power plant reactor in the prior art, and the elevations of each point in the primary circuit are marked in the figure. Among them, when the pressurized water reactor nuclear power plant unit is in normal operation, the primary circuit formed by the reactor pressure vessel 701, the pressurizer 702 and the steam generator 703 connected by the reactor is full of water, and the above circuit needs to be repaired every time the unit is overhauled. Carry out drainage to below the upper surface of the main pipeline (the upper surface of the main pipeline is as figure 1 9.28m a...

AI Technical Summary

Problems solved by technology

The method of static exhaust plus dynamic exhaust takes a long time, usually more than 20 hours

[0004] The method of static exhaust plus dynamic exhaust not only takes a long time, but also uses the main pump 704 of the reactor coolant system for dynamic exhaust many times, which increases the risk of wear and damage of the main pump 704 of the reactor coolant system

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