Computer technology Control systems

The process of A SW verification and validation assessment is one of the essential parts of NPP I C expert analysis and licensing. For the broad number of systems, particularly computer-based control systems, the problems of A SW verification and validation assessment is desirable to consider simultaneously. This is a reason for theoretical and technological basis improvement for developing and realization of A SW verification and validation assessment process. 

The development of computer capabiUties in hardware and software, related instmmentation and control, and telecommunication technology represent an opportunity for improvement in safety (see COMPUTER TECHNOLOGY). Plant operators can be provided with a variety of user-friendly diagnostic aids to assist in plant operations and incipient failure detection. Communications can be more rapid and dependable. The safety control systems can be made even more rehable and maintenance-free. Moreover, passive safety features to provide emergency cooling for both the reactor system and the containment building are being developed. 

The second area, the implementation of a modem process monitoring and control system, is the most dramatic current appHcation of CAD/CAM technology to the chemical process industry. The state of the art is the use of computer graphics to display the process flow diagram for sections of the process, current operating conditions, and controUer-set points. The process operator can interact directly with the control algorithms through the... 

Laboratories using computer technology must assure that they have adequate controls in their delivery of data to the EPA. Computer system validation is the process by which a computer system is shown to consistently do what it is supposed to do and only what it is supposed to do. In effect, the validation study confirms and documents the areas of control and the specifications contained in the GALP requirements. 

Qualification practices apply to all components of a computer system and its associated controlled process/operation, procedural controls, and documentation. Any of these components can be purchased or developed by the company or by a computer technology supplier/contract developer. 

The system components that are part of the computer technologies are qualified according to procedural controls. 

During the remediation phase, the computer systems are brought into compliance by implementing the procedural and technological controls determined by the Corrective Action Plan. In addition, the processes needed to sustain the compliance solutions are implemented. 

The computer system specification includes information on how the operation can be controlled using the features in the selected application package. A review of the process must be conducted to familiarize the computer technology supplier and/or developer (external or in-house) with the requirements defined in the requirements specification deliverable. This system view is essential, particularly when the software must interface with other elements such as hardware, people, and databases. The review of the process includes the further gathering of requirements at the system level, and top-level design. 

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