Surge wave pipe structure of nuclear power station voltage stabilizer

Abstract

The invention discloses a surge wave pipe structure of a nuclear power station voltage stabilizer. The surge wave pipe structure is used for releasing and eliminating thermal stratification. The urge wave pipe structure comprises a surge wave pipe for connecting a voltage stabilizer and a main pipeline and is characterized in that a rotational flow mixing groove is adopted at the connection section of the surge wave pipe and the main pipeline; and the rotational flow mixing groove is connected with a light tube section in mode of welding. With the adoption of the surge wave pipe structure, the damage caused by the thermal stratification phenomenon due to the reactor coolant inside the surge wave pipe structure of the nuclear power station voltage stabilizer is reduced, so that the security of a nuclear power station is improved; and the surge wave pipe structure is applicable to the transformation of a surge wave pipe of a voltage stabilizer in the existing arrangement mode, or used in voltage stabilizer surge wave pipe in new arrangement mode.

Description

Technical field: [0001] The invention relates to a pressure stabilizer wave tube structure for thermal stratification of nuclear power plants, in particular to a pressure stabilizer wave pipe structure for alleviating and eliminating thermal stratification of nuclear power plants. Background technique: [0002] In a pressurized water reactor nuclear power plant, the surge tube connects the main circuit of the reactor and the voltage stabilizer, and is the main transmission channel for the voltage stabilizer to control the pressure of the main system. During operation, the fluid from the main circuit has a low temperature and a high density, occupying the lower part of the section of the wave tube; the fluid from the voltage stabilizer has high temperature and low density, and occupies the upper part of the section of the wave tube. This phenomenon is the fluctuation of the voltage stabilizer. Tube thermal stratification. The thermal stratification of the fluid will cause th...

AI Technical Summary

Problems solved by technology

A lot of research is to change the arrangement of the wave tube, such as changing the angle between the wave nozzle on the main pipeline and the horizontal plane from 17' to 38 degrees or vertical direction, but this solution increases the height of the pressurizer, which will cause the reactor building Difficulties in internal arrangement

Patent 200920135851.1 provides a method, which arranges a heating device between the wave tube and the insulation layer, and eliminates thermal stratification by heating the low-temperature part of the wave tube. This solution requires the installation of a heating device and a power supply on the wave tube And temperature control devices, these devices themselves require an independent power supply, there is a problem with the stability of the operation, and it increases the complexity of the device, the difficulty of installation and the workload of maintenance

Korean patent 2012001413-A proposes a device that strengthens mixing by installing a wave pipe section to reduce thermal stratification. It also requires equipment that requires independent power supply on the wave pipe, and there are also certain instability problems.

Images