An application on Alarm Root Cause Tracking system(ACTs)
In this paper, an operator-aid system is proposed for tracking the logics of alarm, finding out the causes of alarm, displaying the highlighted alarm procedure related to the causes, and suppressing and filtering nuisance alarms due to the physical or logical connections between components or systems in abnormal state. The system can be used for operator to identify the detail causes of an alarm without checking all of causes of candidates by alarms. The proposed system will apply to nuclear power plant on CANDU type, Wolsong 3&4 Nuclear Power Plant.
Methods in Nuclear Power Plants
Computerized alarm systems have been applied increasingly to nuclear power plants. For existing plants, an add-on computer alarm system is often installed to the control rooms. Alarm avalanches during the plant transients are major problems with the alarm systems in nuclear power plants. Computerized alarm systems can process alarms to reduce the number of alarms during the plant transients. This paper describes various alarm processing methods, an alarm cause tracking function, and various alarm presentation schemes to show alarm information to the operators effectively which are considered during the development of several computerized alarm systems for Korean nuclear power plants and are found to be helpful to the operators. Keywords—Alarm processing, Alarm presentation, Alarm cause tracking, Alarm logic diagram computerization, Alarm pattern recognition.
Realisation of the integrated control room concept ISACS
The concept of an Integrated Surveillance And Control System (ISACS) has been developed into a first prototype, ISACS-1. ISACS-1 covers the whole interface between the process and the operator, and this interface is fully computerized. A large number of computerized operator support systems (COSSs) are included in ISACS, assisting in functions like disturbance detection, diagnosis and prognosis, identification of relevant actions, and implementation of procedures. An information coordinator in ISACS (the Intelligent Coordinator (IC)) observes the information received from the process and the COSSs, generates new high-level information, and structures and gives priority to information to be presented to the operator. ISACS-1 is subject to extensive evaluation, including large-scale operator experiments. The goal is to demonstrate how computer technology can efficiently be used to improve the operational safety and efficiency of nuclear power plants.<<ETX>>