Passive cooling system presentation device of nuclear power station

Abstract

The invention discloses a passive cooling system presentation device of a nuclear power station. The passive cooling system presentation device comprises an installing base, a control unit, a heating unit, a cooling water tank and a presentation unit, wherein the heating unit, the cooling water tank and the presentation unit are mutually communicated through a circulating pipeline, the cooling water tank is located above the presentation unit and the heating unit, and a top opening of the cooling water tank is communicated with the atmosphere. The heating unit comprises a heating tank and more than one electric heating tube, the electric heating tubes are installed at the top of the inner cavity of the heating tank, and a water inlet magnetic valve and a water outlet magnetic valve are respectively installed on the pipeline close to a water inlet and a water outlet of the heating tank. The presentation unit comprises an impeller, a spindle, two supports, two limiting blocks and a transparent presentation window, wherein two ends of the spindle are respectively fixed in the presentation window through the two supports, the impeller is installed on the spindle and is in clearance fit with the spindle, and the two limiting blocks are tightly fixed to the spindle and located on the upper side and the lower side of the impeller. A passive cooling system is high in working efficiency and low in energy consumption, has a presentation effect and can be used for research and knowledge popularization.

Description

technical field [0001] The invention relates to a demonstration device, in particular to a demonstration device for a passive cooling system of a nuclear power plant, and belongs to the technical field of passive devices. Background technique [0002] At present, the commonly used mitigation methods for beyond design basis accidents in nuclear power plants are to actively spray the inside of the containment vessel or inject water into the reactor cavity to reduce the temperature and pressure of the containment vessel and pressure vessel. However, the existing methods are highly dependent on support systems such as cold sources and power supplies. Once a nuclear power plant has a power outage or a loss of final heat sink and other beyond-design basis accidents, it will fail due to the inability to introduce external cold sources and power supplies in time. The containment vessel could not be cooled, resulting in the most serious nuclear leakage accident. Although some nuclea...

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Problems solved by technology

However, the existing methods are highly dependent on support systems such as cold sources and power supplies. Once a nuclear power plant has a power outage or a loss of final heat sink and other beyond-design basis accidents, it will fail due to the inability to introduce external cold sources and power supplies in time. Inability to cool the containment vessel, leading to the worst nuclear leak

Although some nuclear power plants are equipped with emergency diesel engines as power sources based on the concept of diversity design, they cannot fully meet the power demand of the cooling system, and cannot guarantee the cold source, so the safety of the containment is still unable to be ensured.

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