Research of Online Fault Diagnosis for Sensors Important to Safety in Nuclear Power Plants

Whether sensors important to safety could work normally is the primary factor that affects the safety function of nuclear power plants. Based on the redundant characteristics of sensors important to safety in nuclear power plants, a fault diagnosis method combining hardware redundancy and discrete wavelet transform is proposed. Finally, in accordance with the design requirements for the DCS of nuclear power plant, combined with the relevant laws and standards, a hardware implementation scheme for the diagnosis device, is given as part of the DCS.