Threshold value setting and performance appraisal method of intelligent stick position

Abstract

The invention discloses an intelligent rod position threshold adjustment and performance evaluation method. The method includes the steps of S1, intelligently acquiring control rod motion signals; S2,judging whether the control rod do motion or not, if so, then calculating and recording primary side coil current, auxiliary coil voltage and five groups of measuring coil voltage of rod position detectors after each step of the motion; S3, judging whether the adjustment process is ended or not automatically; S4, after adjustment, carrying out threshold calculation according to the recorded primary side coil current, auxiliary coil voltage and five groups of measuring coil voltage of the rod position detectors. According to the intelligent rod position threshold adjustment and performance evaluation method, threshold adjustment, recording of rod position channel performance evaluation data and data calculation are completed synchronously, the threshold adjustment accuracy and rod positionmeasuring precision are both increased, time for rod position measurement channel performance evaluation to the nuclear reactor start-up plan critical path is shortened effectively.

Description

technical field [0001] The invention belongs to the technical field of position measurement of control rods in nuclear power plants, and in particular relates to an intelligent rod position threshold setting and performance appraisal method. Background technique [0002] The rapid regulation of reactor power in PWR nuclear power plants is mainly realized through the lifting and lowering of control rod bundles. The control operations such as the lifting and lowering of the rod bundle are completed by the rod control system. [0003] However, existing rod control systems do not themselves include feedback mechanisms for verifying whether rod bundle control commands have been correctly executed. Therefore, it is necessary to set up a rod position measurement system, obtain the actual position of the rod bundle through the rod position measurement system, monitor the operation status of the rod control system, and complete the precise positioning of the control rod bundle. [...

AI Technical Summary

Problems solved by technology

In the second Qinshan nuclear power plant, the PLC software in the processing cabinet was used for rod position performance appraisal. All data recording, calculation, and report output are completed by the software, which reduces the workload of data recording and calculation, but the control rod moves during the appraisal. The speed can only be set to 4500ms to run one step, the test time has not been compressed, and it still needs to test the critical path for more than 5 hours after overhaul and before power operation

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