| Takehiko Seiji | Information & Control Systems Div., Power & Industrial Systems, |
| Yukiharu Ohga, D.Eng. | Power & Industrial Systems R&D Lab., Power & Industrial Systems, |
| Mikio Koyama | Nuclear Systems Div., Power & Industrial Systems, |
The supervisory and control system in a nuclear power plant is the "brain" that manages all monitoring and operation tasks. While placing top priority on reliability, such a system must ease the load on operators and improve maintainability. Recent supervisory and control systems, moreover, are totally digital, and are consequently expected to provide even more advanced maintenance functions and greater cost efficiency. Hitachi, Ltd. has adopted advanced digital and electronic technologies to improve operability and supervisory capabilities in nuclear power plants while maintaining sufficient reliability. In particular, Hitachi has recently completed a total-digital system through the development of the "NUCAMM-90" centralized supervisory and control system for advanced boiling water reactors (ABWR), and results from actual operation are already being obtained. At the same time, advances in general-purpose technologies like personal computers, networking, and information technology (IT) have been remarkable, and the possibility of applying such technologies to supervision and operation from the viewpoints of improving performance and reliability has arisen. Against this background, Hitachi has been using these technologies in the development of human-friendly supervisory and control systems and related products. The company is also moving forward on the development of next-generation elemental technologies using signal-processing technologies, multimedia, and other cutting-edge technologies. Testing and evaluation of these technologies are being completed using prototype and results are being applied to actual equipment.
nuclear power plant, supervisory and control system, digital control system, reactor monitoring system, early detection system of anomalous symptoms
