Abstract: A system and method is disclosed for integrating and accessing multiple data sources within a data warehouse architecture. The metadata formed by the present method provide a way to declaratively present domain specific knowledge, obtained by analyzing data sources, in a consistent and useable way. Four types of information are represented by the metadata: abstract concepts, databases, transformations and mappings. A mediator generator automatically generates data management computer code based on the metadata. The resulting code defines a translation library and a mediator class. The translation library provides a data representation for domain specific knowledge represented in a data warehouse, including “get” and “set” methods for attributes that call transformation methods and derive a value of an attribute if it is missing. The mediator class defines methods that take “distinguished” high-level objects as input and traverse their data structures and enter information into the data warehouse.

Abstract: A protective control system and method for a nuclear steam supply system for the protection against the violation of safety design limits, the system comprising the combination of two sub-systems. The first sub-system includes a method or system for a continuous calculation of an operating limit which incorporates a margin that allows sufficient time for the initiation and completion of corrective action without the violation of a design limit. The second sub-system includes a method or system for continuously predicting a pending violation of a design limit far enough in advance to allow the initiation and completion of corrective action. The combination of the two systems not only allows operation of the nuclear steam supply system with the assurance of a sufficient margin to take protective action on the occurrence of an accident but also assures that actual protective action is in fact instituted in sufficient time to avoid the violation of a design limit.

Abstract: A control system and method for a nuclear steam supply system for continuously predicting the pending violation of one of the system's design limits. The prediction is made far enough into the future to allow corrective or protective action to be implemented in a timely manner in order to avoid violation of a design limit even on the occurrence of a worst case accident, or, restated, the occurrence of an accident which causes a most rapid approach to the design limit. Various parameters of the nuclear steam supply system are monitored and fed to a calculating mechanism. Samples of these parameters are periodically taken for the periodic detailed calculation of an index representative of the proximity of violation of the appropriate design limit. Continuous readings of these same parameters are taken for the purpose of making continuous updates of the last calculated index.

Abstract: A monitoring system for providing warning and/or trip signals indicative of the approach of the operating conditions of a nuclear steam supply system to a departure from nucleate boiling or coolant temperature saturation. The invention is characterized by calculation of the thermal limit locus in response to signals which accurately represent reactor cold leg temperature and core power; the core power signal being adjusted to compensate for the effects of both radial and axial peaking factor.