Method for judging operation state of hydraulically driven safety rod of reactor

Abstract

The invention provides a method for judging the operation state of a hydraulically driven safety rod of a reactor. The method comprises following steps: lifting a safety rod by a pump, recording the rod lifting time, comparing the recorded rod lifting time with predetermined rod lifting time, if the difference between the recorded rod lifting time and predetermined rod lifting time reach a threshold value, judging that the fluid loop for lifting the safety rod is in a high resistance state, and reducing the resistance of the fluid loop when the fluid loop is in a high resistance state. The judging method can predict the resistance of a safety rod driving loop and is capable of processing the loop in time when the resistance of the driving loop is large so as to avoid the situation that when the resistance of the driving loop is too large, the safety rod lifting time is too long or the safety rod cannot be lifted, and related faults that influence the normal operation of the reactor arealso avoided.

Description

technical field [0001] The invention relates to the field of reactors, and more particularly, to a method for judging the state of a hydraulic driving system of a safety rod in a reactor. Background technique [0002] At present, the principle of hydraulic drive safety rod is to use the pressure head of the pump to realize the lifting of the safety rod, and rely on gravity to realize the passive dropping of the rod. During the operation of the reactor, the safety rod is kept on the upper part, and the water flows back to the water tank through the gap between the inner and outer cylinders, and the safety rod is kept at the highest position by water pressure balance. During normal shutdown or accident shutdown, the water in the cylinder loses pressure and returns to the water tank quickly, and the safety rod assembly falls to the bottom under the action of its own gravity to stop the reactor. [0003] The general structure of the safety rod hydraulic driving line is that the...

AI Technical Summary

Problems solved by technology

[0006] In order to solve at least one aspect of the above-mentioned technical problems, an embodiment of the present invention provides a method for judging the operating state of a hydraulically driven safety rod in a reactor, by performing real-time monitoring on the lifting time of the safety rod according to the method of the present invention, thereby being able to Judging the flow resistance in the hydraulic drive circuit, and when the resistance reaches a certain value, carry out relevant processing on the hydraulic drive circuit to avoid the problem that the safety rod cannot be lifted due to the increase in the internal flow resistance

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