Integrated modular small pressurized water reactor of steam generator

Abstract

The invention, which belongs to the reactor design technology, particularly relates to an integrated modular small pressurized water reactor of a steam generator. The modular small pressurized water reactor comprises a reactor core and a pressure vessel arranged outside the reactor core. A spiral heat transfer tube having a dual-spiral structure preferably is arranged in annular space between therising segment of the reactor core and the inner wall of the pressure vessel; and two-loop supplied water is led to the heat transfer tube. A reactor coolant is heated by the reactor core and then enters a reactor core rising segment; the flowing direction is changed to be a downward flowing direction by a baffling plate at the upper part of the reactor core rising segment; the water flows throughthe outer side of the heat transfer tube; the two-loop supplied water in the heat transfer tube is heated, so that superheated steam is generated and the generated steam is discharged from a steam collector. With full utilization of the internal space of the pressure vessel, the reactor design is simplified and the safety and economy of the modular small pressurized water reactor are improved.

Description

technical field [0001] The invention belongs to reactor design technology, in particular to a modularized small pressurized water reactor integrated with a steam generator. Background technique [0002] At present, the design of small pressurized water reactor steam generators in the world adopts multiple modules, unit structure, and independent arrangement, and is evenly arranged in the annular space between the rising section of the reactor pressure vessel core and the inner wall of the pressure vessel. The reactor coolant flows through the primary side of the heat transfer tube of the steam generator from top to bottom, and the secondary side feed water enters the feed water header of each independently arranged steam generator. After being distributed by the feed water header, it flows through the steam generator from bottom to top The heat transfer tubes absorb the heat of the reactor coolant to form steam, the steam flows upwards, flows into the steam header, and final...

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Problems solved by technology

The secondary side of the existing pressurized water reactor steam generator is provided with a connection pipe for water inlet and steam outlet on the pressure vessel, and holes need to be drilled on the pressure vessel, which greatly increases the probability of failure of the pressure vessel

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