Novel structure of inhibiting sway phenomenon in voltage stabilizer

Abstract

The invention discloses a novel structure of inhibiting a sway phenomenon in a voltage stabilizer. The novel structure comprises an upper isolation piece and a lower isolation piece that are located in the voltage stabilizer, wherein the upper isolation piece and the lower isolation piece are in cylindrical structures extending in a height direction of the voltage stabilizer; the lower end of the lower isolation piece is fixed at the bottom of the voltage stabilizer; the upper isolation piece is fixed above the lower isolation piece and communicated with the lower isolation piece; the radial dimension of the upper isolation piece is greater than that of the lower isolation piece; and the upper end of the upper isolation piece is in an opening shape. An internal space of the voltage stabilizer is divided into an internal part and an external part by the upper isolation piece and the lower isolation piece, so that a diameter height ratio of the space is decreased; the sway phenomenon does not occur easily; at the same time, a fluid flow rate is limited radially; a vessel wall is protected; at the same time, heating rods at the bottom of the voltage stabilizer cannot be exposed; and in addition, the measurement accuracy of a water level in the voltage stabilizer is also ensured. Therefore, the novel structure facilitates improving safety, reliability and economy of a nuclear power plant.

Description

technical field [0001] The invention relates to the technical field of the main cooling system of a nuclear power plant, in particular to an internal structure of a voltage stabilizer. Background technique [0002] The voltage stabilizer is used in the primary circuit of the nuclear reactor and is an important component of the main cooling system of the nuclear power plant. When an accident occurs in the primary circuit and the pressure increases or decreases, the pressure of the primary circuit is automatically adjusted to ensure the normal operation of the primary circuit. [0003] The environment of sea-based nuclear power plants is harsher than that of land-based nuclear power plants. Under the influence of external conditions such as wind, waves, and ocean currents, the offshore floating platforms or ships carrying nuclear power plants will tilt, heave, and sway. At this time, the water surface in the pressurizer of the nuclear power plant will slosh non-linearly. In th...

AI Technical Summary

Problems solved by technology

At this time, the water surface in the pressurizer of the nuclear power plant will slosh non-linearly. In this case, the water in the pressurizer impacts the vessel wall of the pressurizer, causing different degrees of impact pressure on the inner wall of the pressurizer.

When the impact pressure is relatively large, the sloshing phenomenon may directly endanger the structural integrity of the voltage stabilizer

At the same time, the impact pressure caused by sloshing will have a more obvious impact on the water level measurement in the voltage stabilizer. When the sloshing phenomenon occurs in the voltage stabilizer, the measured water level is higher or lower than the actual water level. In this case, causing Frequent actions of the water level control system may even lead to false triggering of safety signals

In addition, when the sloshing phenomenon is severe, the top of the heating rod in the regulator may be exposed, causing the heating rod to fail to cool down in time and burn out

If the sloshing phenomenon in the voltage stabilizer cannot be effectively suppressed, the safety, reliability and economy of the nuclear power plant will be greatly reduced

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