Steam generator for metal fast reactor

Abstract

The invention provides a steam generator for a metal fast reactor. The steam generator for the metal fast reactor comprises a container body and a U-shaped heat exchange pipe arranged in the containerbody. A shell pass and a pipe pass are formed in the container body. A secondary side outlet and a primary side inlet are arranged from bottom to top on one side of the container body. A secondary side inlet and a primary side outlet are arranged from bottom to top on an opposite side. A high-temperature medium enters the shell pass through the primary side inlet and is exported through the primary side outlet after being cooled. A low-temperature medium enters the pipe pass through the secondary side inlet and is exported from the secondary side outlet after being heated. Furthermore, the pipe wall of the heat exchange pipe is manufactured by adoption of lamination of multiple layers of pipe walls; each pipe wall is made by adoption of stainless steel and nickel base alloy; on the basisthat safety and reliability needed by the steam generator are guaranteed, manufacturing cost and manufacturing difficulty of the steam generator are lowered; and the integral economy of the steam generator is improved.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant equipment, in particular to a steam generator for liquid metal fast reactors. Background technique [0002] Steam generators used in nuclear reactors generally use titanium tubes as corrosion-resistant layers. Since the operating temperature of titanium tubes is below 425 degrees Celsius, the operating temperature range of this type of reactor is greatly limited, and it will not be suitable for the field of metal block reactors. Moreover, the titanium tube is used as the corrosion-resistant layer, which increases the cost of heat exchanger manufacturing. The commonly used U-shaped heat exchange tube needs to be provided with anti-vibration strips at the bend, and because the liquid metal has a high viscosity and is easy to corrode the heat exchange tube, If the liquid metal flows in the tube side, the flow resistance of the liquid metal will increase, the requirements for the liquid me...

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Problems solved by technology

[0002] The steam generators used in nuclear reactors generally use titanium tubes as the corrosion-resistant layer. Since the operating temperature of titanium tubes is below 425 degrees Celsius, the operating temperature range of this type of reactor is greatly limited, and it will not be suitable for the field of metal block reactors. Moreover, the use of titanium tubes as the corrosion-resistant layer increases the cost of heat exchanger manufacturing. The commonly used U-shaped heat exchange tubes need to be equipped with anti-vibration strips at the bends, and because the liquid metal has a high viscosity and is easy to corrode the heat exchange tubes, If the liquid metal flows in the tube side, it will increase the flow resistance of the liquid metal, increase the requirements for the liquid metal delivery pump, and affect the natural circulation ability of the liquid metal, and the multi-layer casing structure is used in the steam generator, which will be difficult Carry out in-service inspection work, and due to the existence of multi-layer tube sheets, it will not be possible to perform plugging repair work on heat exchanger tubes

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