Nuclear sampling system of nuclear power station and inspection method of sampling pipeline thereof

Abstract

The invention relates to the technical field of nuclear power station primary circuit auxiliary systems. The invention provides a nuclear sampling system of a nuclear power station and an inspection method of a sampling pipeline thereof. According to the nuclear sampling system of the nuclear power station, a containment spraying system can be connected into the nuclear sampling system, sampling is conducted on the containment spraying system after an accident through the nuclear sampling system, a third sampling pipeline and a fourth sampling pipeline can be rapidly communicated and subjectedto conducting inspection, operation is more convenient, the number of times of valve operation can be reduced, and safety risks are reduced. The inspection method of the sampling pipeline of the nuclear sampling system is convenient to operate and simple in step; the third sampling pipeline and the fourth sampling pipeline can be rapidly subjected to conducting inspection; the whole conduction inspection process basically does not cause unnecessary interference or influence on an original nuclear sampling system, safety risks caused by valve operation can be reduced, and the situation that the leakage rate of a primary circuit is increased and other unpredictable risks are caused due to the fact that a valve on the nuclear sampling system is frequently operated to be adjusted and stoppedunder overpressure or a safety valve accidentally acts is avoided.

Description

technical field [0001] The application belongs to the technical field of primary circuit auxiliary systems of nuclear power plants, and more specifically relates to a nuclear sampling system of a nuclear power plant and an inspection method for sampling pipelines thereof. Background technique [0002] The nuclear power plant containment sprinkler system (abbreviated as EAS) is a specially designed safety facility. In the event of a loss of water accident (LOCA for short) or the rupture of the secondary circuit pipeline in the containment, the pressure and temperature in the containment rise, and the EAS sprays boron water containing sodium hydroxide evenly into the containment to make the containment The internal pressure and temperature are reduced to an acceptable level. At the same time, sodium hydroxide in boron water can increase the pH value, reduce the corrosion of metals in the containment caused by the acidity of boron water, and reduce the possible release of radio...

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Problems solved by technology

[0004] The purpose of this application is to provide an inspection method for the nuclear sampling system of a nuclear power plant and its sampling pipeline, so as to solve the technical problem that the nuclear power plant conducts a conduction inspection on the EAS sampling pipeline after the accident. The operation is relatively complicated and has a large safety risk

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