Computerized procedure system for the APR1400 simulator

Abstract

The ShinKori Unit 3&4 which is the reference plant for APR1400 simulator plans to utilize various display devices and computerized Human Machine Interface (HMI) as well as many kinds of digitalized instrumentation and control. The operating crew will be given a lot of information on display devices in order to diagnose the system states and control devices. And with the limitations of paper-based procedure (PBP) including lack of interactive capabilities between the PBP and sophisticated systems, and the high volume and cost associated with paper manuals used in complex and technically demanding environments, the computerized procedure system (CPS) is developed as a part of computerized systems for APR1400 simulator. The developed CPS covers all operating procedures including normal, abnormal and emergency, and provides information through workstation consoles using flowchart and tree structure and also has automatic checking capabilities of step logic including continuously applied steps. The CPS consists of Procedure eXecution System (PXS), and Engineering System (ES) including procedure editor (PED) and Non-Integrated System Test System (NISTS). The PXS is the execution system for the procedure provided to the operators and has the following functions. 1) Display of the plant status information necessary for the instructions and executions for the procedure, 2) auto-check functions instead of manual monitoring based on the paper-based procedures, 3) detection and recovery functions of operators’ faults, 4) generation function of the LCP (Logged Computerized Procedure) to search the results of the procedure execution, 5) generation function of the Log Paper Procedure supporting the continued operation using the paper procedure when the CPS fails. The ES (Engineering System) is the environment provided to the writer and maintainer of the CP (Computerized Procedure), the application program loaded in the PXS. The CP is frequently revised in the plant, and related to the safety of the plant. Therefore, the CP is provided to secure the quality and convenience of the developed procedure. For the verification, among the implemented computerized procedures by using PED, a procedure for the LOCA (Loss-Of-Coolant Accident) is selected for testing the integrity of the CPS including communication between CPS and other systems for APR1400 simulator, which is proved to be well implemented. Currently, the implemented CPS is being used to the Preliminary Validation Phase II Test hosted by NETEC (Nuclear Environment TEChnology Institute) in Korea.