Auxiliary water supply system used for nuclear power station single reactor and actuating safety function

Abstract

The invention belongs to auxiliary water supply systems of nuclear power stations, and particularly relates to an auxiliary water supply system used for a nuclear power station with single reactors and actuating safety function. The auxiliary water supply system comprises an auxiliary water supply tank, and two water supply series connecting the auxiliary water supply tank with an evaporator. Each water supply series comprises an electric pump and a pneumatic pump which are connected in parallel, each pump is provided with a regulating valve, and an isolating valve is arranged on a pipeline between the regulating valve and a pore plate. The evaporator supplies steam power for the pneumatic pumps through a steam turbine, a connecting valve and a connecting pipe are installed between the two water supply series, the joint points between the connecting pipe and water supply pipelines are arranged on the pipeline between the regulating valve and the isolating valve. Because each water supply pipeline in the two water supply series comprises one 100 percent of electric pump and one 100 percent of pneumatic pump which are connected in parallel, the safety of the system is increased. The auxiliary water supply system is especially suitable for the auxiliary water supply system in a nuclear power station with pressurized water reactors, and can efficiently increase the safety of the nuclear power station.

Description

technical field [0001] The invention relates to an auxiliary water supply system for a nuclear power plant, in particular to an auxiliary water supply system for performing safety functions used by a single reactor of a nuclear power plant. Background technique [0002] The auxiliary water supply system is one of the specially designed safety facilities of the PWR nuclear power plant. When an accident occurs in the main water supply system, the auxiliary water supply system is put into operation to discharge the waste heat from the core. Especially in the event of a plant-wide power failure (off-site power supply and emergency diesel engine power supply loss), the auxiliary water supply system is the last resort to remove residual heat from the core. Therefore, the rational design and good operation of the auxiliary water supply system are crucial to ensure the safe operation of nuclear power plants. [0003] The auxiliary water supply system consists of two parts, one is ...

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Problems solved by technology

However, considering that these accidents may release a large amount of radioactive products, it is necessary to study the consequences of these accidents on the safety of the power station

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