The Research on On-line Life Evaluation Method and Algorithm of CRDM Coils
The existing pressurized water reactor control rod drive mechanism can only provides limited monitoring and diagnostic information and cannot fully assess the performance change process of the working coil.Based on the existing thermal life equation of the working coil in the control rod drive mechanism,a set of methods for online life assessment of the working coil has been researched and designed.By collecting the working voltage and the working current of the coil,the real-time resistance of the working coil is obtained and converted into the real-time operating temperature of the working coil.Using the aforementioned online life assessment method,the actual working time is converted into the consumption time of the thermal life of the working coil.This ultimately achieves the goal of online life prediction and evaluation of the working coil in the control rod drive mechanism.
control rod drive mechanismworking coilonline life assessment