System for monitoring pressure vessel of reactor of nuclear power station and method thereof

Abstract

The invention relates to the technical field of nuclear power and discloses a system for monitoring a pressure vessel of a reactor of a nuclear power station and a method thereof. The monitoring system contains a monitoring terminal which is disposed at the monitoring point of the monitored pressure vessel of the reactor and is used to acquire and send temperature information of the pressure vessel of the reactor; and a monitoring device which is electrically connected with the monitoring terminal and is used to receive the temperature information sent from the monitoring terminal and monitor the state of the pressure vessel of the reactor according to the temperature information. According to the invention, as there is no need to contact high temperature melts, the cost of the monitoring terminal can be reduced, its installation position is easy to determine and the acquired temperature information is effective and reliable. Based on the temperature information, the state of the pressure vessel of the reactor can be effectively monitored. The system for monitoring the pressure vessel of the reactor of the nuclear power station has a simple structure and requires low cost. The monitoring method provided by the invention is convenient to carry out and has high accuracy.

Description

technical field [0001] The invention relates to the technical field of nuclear power, and more specifically, to a monitoring system and method for a reactor pressure vessel of a nuclear power plant. Background technique [0002] Reactor Pressure Vessel (RPV) is a cylindrical vessel in a pressurized water nuclear reactor, which includes the core of the nuclear reactor and is vertically arranged in the reactor cavity. Under normal circumstances, the pressurized water cools the core, so the temperature of the core and the reactor pressure vessel fluctuates in a small range. However, after a severe accident (such as an unexpected stop of core cooling), the reactor core may melt and further cause the reactor pressure vessel to melt through, with serious consequences. [0003] In the Fukushima nuclear power plant accident in Japan, due to the lack of corresponding means to monitor the reactor pressure vessel, the effectiveness of external water injection after the accident could ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to judge whether the reactor has melted through the thermocouple at the bottom of the reactor cavity in the prior art, the cost of the thermocouple is high, the installation position is difficult to determine, there is a danger of structural damage, and the validity of the measurement signal is difficult. To provide a monitoring system and method for reactor pressure vessels of nuclear power plants with low requirements for thermocouples, easy determination of installation positions, and high validity of measurement signals

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