Nozzle sealing and connecting method for pressurized water reactor nuclear power station
The technology of a pressurized water reactor nuclear power plant and its connection method, which is applied in the field of nuclear power plant component sealing devices, can solve the problems affecting the power generation efficiency and economic benefits of nuclear power plants, and the adverse effects of equipment, and achieve the effects of simple structure, improved cooling effect, and convenient disassembly
Inactive Publication Date: 2015-04-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
This part of the coolant flows out directly without core heating, which affects the power generation efficiency and economic benefits of the nuclear power plant, and at the same time has a negative impact on the equipment
Method used
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[0013] The invention provides a sealing connection method for a nozzle of a pressurized water reactor nuclear power plant. The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0014] figure 2 Shown is a schematic diagram of the effective sealing connection structure between the outlet nozzle of the hanging basket of the pressurized water reactor nuclear power plant and the outlet nozzle of the pressure vessel.
[0015] The nozzle seal connection method of the pressurized water reactor nuclear power plant is firstly to change the contact end surface of the outlet nozzle 1 of the hanging basket and the outlet nozzle 2 of the pressure vessel into a plane, and weld a flange 4 at the ends of the two. A circular or square groove 5 is opened at the corresponding position on the flange surface of the outlet nozzle 1 and the end of the pressure vessel outlet nozzle 2, wherein the two flange surfaces are inclined at an ...
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The invention discloses a nozzle sealing and connecting method for a pressurized water reactor nuclear power station and belongs to nuclear power station part sealing devices and technical ranges. According to the method, a contact end face of a hanging basket outlet nozzle and a pressure container outlet nozzle is modified into a plane; a flange disc is welded at the end of the hanging basket outlet nozzle and the end of the pressure container outlet nozzle; round grooves are respectively formed at corresponding positions on two flange disc surfaces; an O-shaped sealing ring is arranged in each groove; and the height of the O-shaped sealing ring is larger than the distance between the hanging basket outlet nozzle and the pressure container outlet nozzle, so that the hanging basket outlet nozzle and the pressure container outlet nozzle are effectively pressed and sealed through the sealing ring. Effective sealing connection at the hanging basket outlet nozzle and the pressure container outlet nozzle of the pressurized water reactor nuclear power station is realized, the flow of a coolant which is not heated by a reactor core and directly flows from the gap between the inner wall of a pressure container and the hanging basket outlet nozzle to the pressure container outlet nozzle is reduced, the cooling effect is improved, the structure is simple, the overall structure of the hanging basket and the pressure container is not modified, and smooth lifting and discharging of the hanging basket are not influenced.
Description
technical field [0001] The invention belongs to the sealing device and technical scope of nuclear power plant components, and in particular relates to a sealing connection method for nozzles of a pressurized water reactor nuclear power plant. In particular, it relates to the butt sealing connection between the nozzle outlet of the hanging basket and the outlet nozzle of the pressure vessel. Background technique [0002] At present, in order to ensure that the hanging basket is lifted out smoothly when it needs maintenance, the pressurized water reactor nuclear power plant needs to figure 1 The outlet nozzle 1 of the hanging basket and the outlet nozzle 2 of the pressure vessel shown in the figure are directly connected by a seam butt joint, and there is no welding or other effective sealing connection. Under normal operating conditions, when the primary circuit coolant flows in the pressure vessel, the coolant flow directly from the gap between the inner wall of the pressur...
Claims
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IPC IPC(8): G21C15/22
CPCY02E30/32Y02E30/30
Inventor 陆道纲李宗洋夏会宁
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)