Pressurized-water nuclear reactor structure

Abstract

The invention discloses a pressurized-water nuclear reactor structure. The structure comprises an integrated reactor top, an actuating mechanism, a pressure vessel, reactor internals and a heat-insulating component, wherein the integrated reactor top is connected with a top cover of the pressure vessel, the heat-insulating component is arranged on the external surface of the pressure vessel, the reactor internals are hung to a supporting step of the pressure vessel, and the actuating mechanism is mounted on the top cover of the pressure vessel. According to the pressurized-water nuclear reactor structure, a neutron flux measurement detector, a temperature measurement detector and a water level measurement detector can be led out of a reactor through a reactor internal measurement guide structure and a pressure vessel top penetrating piece which are located in an upper closure head of the pressure vessel, so that the increase of number of reactor internal measurement tube holders on the top cover is avoided; the requirements on water level measurement can be met; the flow of a coolant entering a reactor core is distributed reasonably; the technical effect of rapidly cooling the exterior of the pressure vessel of the reactor can also be achieved by a heat insulating layer.

Description

technical field [0001] The invention relates to the research field of pressurized water nuclear reactors, in particular to a pressurized water nuclear reactor structure. Background technique [0002] The ACP1000 pressurized water reactor is the third-generation pressurized water reactor independently designed by China. The ACP1000 pressurized water reactor uses 177 sets of fuel assemblies to form the core, which will withstand an earthquake acceleration of 0.3g and extend the reactor life to 60 years. [0003] Compared with the second-generation and second-generation improved pressurized water reactors, the third-generation pressurized water reactors cancel the neutron measurement instrument bushing and neutron measurement tube socket located at the bottom head of the reactor pressure vessel, and the neutron flux measurement detector, The temperature measurement probe and the water level measurement probe are led out of the reactor through the in-stack measurement guide stru...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a pressurized water type nuclear reactor structure, which solves the unreasonable design of the existing pressurized water type nuclear reactor structure. When the in-core measurement guide structure in the upper head and the penetrating piece on the top of the pressure vessel are led out of the reactor, the number of measurement tube sockets in the reactor on the top cover is greatly increased, and the flow distribution of the lower head is unreasonable, and the cooling effect of the reactor pressure vessel is poor. Due to poor technical problems, it can accommodate and support 177 sets of fuel assemblies, achieve a 60-year life of the reactor, and realize that the neutron flux measurement detectors, temperature measurement detectors and water level measurement detectors are located in the upper head of the pressure vessel. The in-core measurement guide structure and the pressure vessel top penetrating piece lead to the reactor; it can meet the requirements of water level measurement; on the premise of realizing the functions of the reactor internals, the coolant flow into the core can be reasonably distributed; in addition, the reactor top structure can be It meets the functional requirements of the reactor top and meets the requirements for the operating space after the neutron flux measuring detector, temperature measuring detector and water level measuring detector are led out from the top; the thermal insulation layer can also realize the technical effect of rapid cooling outside the reactor pressure vessel

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