| Kazuhiko Ishii | Nuclear Power Control and Instrumentation Systems Engineering Dept., Power Control Systems Div., Information & Control Systems Div., Information & Telecommunication Systems, |
| Takeshi Nozaki | Control & Instrumentation Design Section, Nuclear Plant Control & Instrumentation Engineering Dept., Hitachi Works, Power Systems, |
| Kohei Kohara | Nuclear Power Control and Instrumentation Systems Engineering Dept., Power Control Systems Div., Information & Control Systems Div., Information & Telecommunication Systems, |
| Shigeru Udono | Nuclear Power Control and Instrumentation Systems Engineering Dept., Power Control Systems Div., Information & Control Systems Div., Information & Telecommunication Systems, |
| Katsuhiko Miyashita | Service Project Gr., Nuclear Power Service Engineering Development Dept., Nuclear Systems Div., Power Systems, |
An RMCS (reactor manual control system) and RPIS (rod position information system), which are next-generation products, were developed to assist in stable operation of existing BWR (boiling water reactor) plants. Installation tests of these systems were completed at The Tokyo Electric Power Company Incorporated, Kashiwazaki Kariwa Nuclear Power Station Unit 4, and The Chugoku Electric Power Co., Inc., Shimane Nuclear Power Station Unit 2. The new systems started operation at both of plants in June 2005. The basic concept of these systems is to improve performance [avoidance of LCO (limiting condition of operation)] by maintaining compatibility with existing facilities and by utilizing the functions of a redundant decentralized system. It is a system that monitors the positions of control rods while operating them manually in the BWR plants. A soft logic method was created by adopting the latest controller and optical data transmissions that use the latest IC (CMOS: complementary metal-oxide semiconductor). This method is used in place of the logic method, which uses IC technology (TTL: transistor-transistor logic).
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The Hitachi Hyoron (Japanese Only) |
rod control system, RMCS, reactor manual control system, RPIS, rod position information system, BWR, boiling water reactor, LCO, limiting condition of operation, I&C, instrumentation and control, control system, controller
