A method and system for continuously monitoring the state of a spent fuel pool

Abstract

The invention, belonging to the technical field of nuclear industry measurement, particularly relates to a spent fuel pool state continuous monitoring method and a system thereof. The system comprises a liquid level, temperature measuring transducer, a transmitter unit, an installation support, a guide cylinder, a cable and an installation accessories, wherein the liquid level, temperature measuring transducer is fixed by the guide cylinder and the support, signals output by the transducer are transmitted by the cable to the remote mounted transmitter unit and are subject to calculation and compensation and other treatment and then transmitted to a main control room DSC system. According to the invention, under various operation states of nuclear power station, especially accidents, the liquid level and temperature continuous monitoring problem of the spent fuel pool from the exposure of spent fuel to the full water level is solved; simultaneously under design basis earthquake conditions and station blackout condition, the continuous monitoring problem of the spent pool is solved, thus the operator can monitor the spent pool states in real time; the system has the advantages of simple structure, convenient on-line adjustment and calibration, and easy interface with the control system, and can realize the real-time accurate continuous liquid level temperature two-parameter monitoring.

Description

technical field [0001] The invention belongs to the technical field of nuclear industry measurement, and in particular relates to a method and system for continuously monitoring the state of a spent fuel pool. Background technique [0002] The spent fuel pool is used as a storage place for spent fuel. As long as there is spent fuel in the pool, it must be filled with water and maintain a normal water level to provide the necessary safe biological protection; hot. After the large-scale nuclear leak caused by the Fukushima earthquake on March 11, 2011, improving the state monitoring of spent fuel pools has received great attention from the nuclear safety bureaus of various countries. In the context of this demand, continuous monitoring of the state of spent fuel pools is required to ensure safety under various operating conditions of nuclear power plants, especially in accidents. [0003] In the original design of the M310 reactor type reactor refueling pool and spent fuel p...

AI Technical Summary

Problems solved by technology

As far as liquid level measurement is concerned, only high and low liquid level alarms can be output respectively, and continuous liquid level measurement cannot be performed, and the float type liquid level switch has many mechanical parts, which are prone to failure, and maintenance and online calibration are very difficult

[0004] In summary, the previous design cannot carry out continuous measurement of the liquid level of the exhaust pool, and cannot guarantee the continuous monitoring of the liquid level and temperature of the exhaust pool under conditions similar to the Fukushima accident (such as earthquakes and power outages in the whole plant) needs

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