Research on Typical Fault Diagnosis of Nuclear Power Plant Based on Weighted Logical Inference Arithmetic

The safety of nuclear power is the main problem that the nuclear power plant (NPP) has been trying to solve since its production. Especially after the Fukushima accident, the safety of nuclear power plants has attracted wide attention all over the world. However subject to the requirements of economy, it is impossible to improve the safety of nuclear power plants only by increasing the redundancy of the system or by improving the safety level of equipment. NPP fault diagnosis provides another direction to improve the safety of nuclear power plant. Under the NPP fault condition, although the signal changes rapidly and the fault modes are various, this fault diagnosis method on weighted logical inference arithmetic can still carry on the evidence reasoning. Furthermore, based on this fault diagnosis method we do not need to collect numerous fault samples that the number of fault samples is very small. This study production can provide auxiliary support for NPP operators when dealing with accident.