Expert evaluation system of water chemical conditions quality for nuclear power stations

Expert systems of heat-transfer medium status diagnosing and monitoring is intended on the whole for solving safety and reliability tasks for Nuclear Power Plant (NPP) facilities both by means of on-line status control and keeping parameters of water chemical conditions (WCC) within stated rates and reasonable interference into process. State institute ''VNIPIET'' has developed an expert diagnostic system for the NPP with RBMK. Taking into consideration the importance of the object to be diagnosed, the system is not used in controlling functions, but it is only a NPP personnel information support system. An effective diagnosing system - operator interaction will enable a stable detection of taking WCC deviations early in their development, a quick retrieval of causes diagnosing and validated recommendations for required actions to eliminate them. Because of a number of features of a diagnosed object (DO), that is coolant, WCC diagnosing and monitoring was arranged in a separate system of functional diagnosing and monitoring (SFDM) integrated with a general management system of NPP. An advanced diagnosing System of WCC status was constructed using the following facilities: automatic chemical control devices, manual control means and computer facilities, including software and peripheral equipment. (author)