Double-wall heat transfer tube once-through steam generator

Abstract

The double-wall heat transfer tube once-through steam generator comprises a steam tube plate, an upper tube plate, a lower tube plate and a water supply tube plate which are sequentially arranged in a cylinder from top to bottom, a double-wall heat transfer tube is arranged between the steam tube plate and the water supply tube plate, the double-wall heat transfer tube comprises an inner wall tube and an outer wall tube which are tightly attached, and the inner wall tube and the outer wall tube are arranged in the cylinder. The upper end of the inner wall pipe is fixedly connected to the steam pipe plate, the lower end of the inner wall pipe is fixedly connected to the water supply pipe plate, the upper end of the outer wall pipe is fixedly connected to the upper pipe plate, and the lower end of the outer wall pipe is fixedly connected to the lower pipe plate. The double-wall heat transfer tube once-through steam generator can effectively prevent, isolate and restrain leakage of media.

Description

technical field [0001] The invention relates to the technical field of steam generators, in particular to a double-wall heat transfer tube direct-flow steam generator. Background technique [0002] The steam generator is the key equipment in the reactor and the hub of heat transfer between the primary and secondary side media, and its safety is of great significance. At present, the steam generators of pressurized water reactor nuclear power plant reactor systems at home and abroad mostly use single-wall heat transfer tubes. Generally, regular in-service inspections or regular preventive maintenance are used to ensure the safety and reliability of the pressure-bearing boundary. With the development of new technologies in recent years, liquid metal reactors have gradually been approved for construction engineering applications. Compared with pressurized water reactors, due to the inherent characteristics of liquid metal medium, its operating temperature is higher, the risk i...

AI Technical Summary

Problems solved by technology

The liquid metal medium used in reactors such as lead-bismuth fast reactors and lead-cooled reactors has a strong ability to dissolve general metal materials at high temperatures, which can easily cause corrosion and damage to the heat transfer tubes, which in turn leads to radioactivity. 210 Po leaks to the atmosphere or high pressure water enters the reactor vessel

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