Reverse pushing type reactor pressure vessel and reactor internals thereof

Abstract

The invention belongs to the technical field of nuclear power safety equipment design, and specifically relates to a reverse pushing type reactor pressure vessel and reactor internals thereof. According to the present invention, a main separation plate and a secondary separation plate are welded on the bottom dome of a reactor pressure vessel, the main separation plate is positioned above the secondary separation plate, a high performance hydraulic jack is positioned on the secondary separation plate, a gradual changing type control rod is positioned on the main separation plate, the lower end of the gradual changing type control rod is inserted into the main separation plate, the upper end of the gradual changing type control rod is inserted into the top dome of the reactor pressure, an inside-reactor structure guide steel column is welded on the bottom dome of the reactor pressure vessel, the upper end of the inside-reactor structure guide steel column is inserted into the top dome of the reactor pressure, a fuel assembly tray is positioned above the main separation plate and is provided with a plurality of holes, the gradual changing type control rod and the inside-reactor structure guide steel column penetrate through the holes, the lower end of the fuel assembly tray and the upper end of the high performance hydraulic jack are connected, and a neutron absorption body is positioned in a cavity formed by the reactor pressure vessel main body, the bottom dome of the reactor pressure vessel, the main separation plate and the secondary separation plate.

Description

technical field [0001] The invention belongs to the technical field of nuclear power safety equipment design, and in particular relates to a reverse thrust reactor pressure vessel and its internal components. Background technique [0002] Nuclear power plant reactor pressure vessel, reactor internals and internals control drive mechanism are the most important safety-related equipment in nuclear power plants, the core part of the nuclear steam supply system, and the main heat source for nuclear steam supply. The reactivity control of the reactor pressure vessel and the reactor internals and the control rod drive system perform on / off and power adjustment under normal conditions, and perform safety shutdown under accident conditions. [0003] At present, the commonly used reactor pressure vessels and internal components of PWRs and the control and driving mechanisms of internal components mainly include special steel reactor pressure vessels, fuel assemblies, control rods, ne...

AI Technical Summary

Problems solved by technology

However, according to previous operating experience of nuclear power plants, during accident conditions (generally earthquake conditions) when the control rods are falling, rod jamming accidents may occur due to the displacement of reactor internal components, and the control rods cannot be inserted, resulting in serious accidents. as a result of

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