Experience and Lessons from Software Configuration Management for PMAS

Plant Monitoring and Annunciator System (PMAS) for Shin-Kori and Shin-Wolsong nuclear power plants 1 and 2 is the first localization of a large scale I and C system in nuclear power plant construction project. The PMAS is composed of Plant Computer System (PCS), Plant Data Acquisition System (PDAS) and Plant Annunciator System (PAS). The function of the PCS is to perform plant status monitoring and application programs running. The PDAS performs I/O signal acquisition, processing and data communication for the PCS, and the PAS performs the annunciation of plant alarm through annunciator window. The PCS and the PDAS/PAS are developed by different organizations, and they are integrated at the staging area. After the testing at the staging area, the PMAS is delivered to the site. The software configuration management has been executed respectively by each developing organization of the PCS and the PDAS/PAS before integration, and the software codes of the PCS and the PDAS/PAS are merged to unified software configuration environment at the time of integration