The main pipeline blocks the property, regardless of the upstairs residents or the first floor, can it be diverted separately?

It can be diverted separately, and the requirements of residents on the first floor are completely reasonable. If the owner of the residential area pays the co-ordination funds taken care of by the owner, it will be maintained by the residential property, which means that the property service is charged.

The main pipeline is the pipeline connecting the main equipment of the primary coolant system of the reactor, which consists of straight pipe section, elbow and nozzle. The pipeline between reactor and steam generator is called hot section, the pipeline between steam generator and main pump is called transition section, and the pipeline between main pump and reactor is called cold section. The main pipeline is an important pressure boundary for containing reactor coolant, which belongs to nuclear safety level I and seismic level I equipment.

The main pipeline is used to transport the reactor coolant driven by the main pump and form a forced circulation between the reactor and the steam generator. Under rated working conditions, the average velocity of coolant in the main pipeline must be less than 18.3m/s, and the selection of structural materials, dimensions and geometric shapes should be conducive to reducing the corrosion and erosion rate of the pipeline. The inner diameter of the main pipeline is generally in the range of 700 ~ 800 mm

In the design of some nuclear power plants, the hot section, transition section and cold section of the main pipeline adopt the same inner diameter; However, in many nuclear power plants, three different sizes of inner diameters are selected, and the transition section is usually the largest to improve the suction conditions of the main pump.

During the service period, the nuclear power main pipeline suffered from high temperature, high pressure, high flow of high pure water corrosion and high frequency fatigue, and the working environment was very bad. Therefore, the selected pipeline materials must have high strength, high toughness, good fatigue performance and corrosion resistance.

According to the different types of PWR, the materials used in the main pipeline are also different. For other types of reactors, heavy water reactors and sodium-cooled fast reactors are made of austenitic stainless steel. Generally, the main pipeline of gas-cooled reactor adopts carbon steel or low alloy steel, and the fourth generation nuclear power technology being developed, high temperature gas-cooled reactor adopts heat-resistant steel and high nickel alloy.