Study of Reliability Assessment on Nuclear Safety DCS Module with Small Sample Size

In order to establish a reliability assessment method on the nuclear safety DCS module with small sample size for assessing on reliability of the nuclear safety DCS module with small sample size, this study transforms operation data of the other similar nuclear safety DCS modules to operation data of the nuclear safety DCS module to be assessed based on the reliability ratio from the process of reliability prediction for solving the problem of small sample size. It's carried out a reliability assessment on the MPU (Main Process Unit) module of the nuclear safety DCS by using the operation data of the MPU module, transformed operation data of the other similar safety DCS modules and the reliability data of these modules from reliability prediction. It turns out the result of this assessment has good agreement with the reliability prediction. Thus, the reliability assessment method used in this study can be used in reliability assessment on the nuclear safety DCS module with small sample size.