A GRAPHIC INTERFACE TOOLKIT BASED ON MFM AND ITS APPLICATION TO OPERATING SUPPORT FOR MONJU PLANT

摘要

Because of the development and maturation of computer and related technologies, the digitization is inevitably happening in many fields of NPP. However, the design, development and maintenance of operator support system such as digital operating procedure under both operational states and accident conditions require not only a profound understand of design, operation and structure of NPP but also expertise on information technology. An integrated tool is proposed for helping the user to develop the operating support system of NPP. With a friendly graphical interface, this integrated tool includes a Multilevel Flow Models (MFM) toolkit, a database and a procedure development toolkit. The MFM toolkit includes a MFM editor and a MFM executor. The user will construct the MFM model for the target system with the MFM editor. The executor can load the MFM model and make the consequence analysis for finding root cause of accident and its propagation in the plant during abnormal and emergent operating condition. In this database, a three layer hierarchy is adopted to express the complexity of operating procedure, which includes mission, process and node. The procedure development toolkit consists of a procedure editor and a procedure executor. According to the design mentioned above, a prototype system of this integrated tool has been developed. The prototype system is applied to develop a demonstration operating support system for Japanese Monju Nuclear Power Plant. A MFM model for Monju plant is established by using the MFM toolkit. A simplified operating procedure for response to sodium leakage of Monju plant is developed and tested by using the procedure development toolkit.