Implementing Computerized Instrumentation and Control Systems at Swedish Nuclear Power Plants

These standards require traceability and a structured Verification &Validation, V&V approach during the complete life cycle of the product.

A documented design process and a stepwise V&V approach is necessary to quality assure these types of systems. When implementing computerized I&C systems, it is not possible to write a technical description at the end of a project which someone outside the project can grasp, review or follow in a way that can quality assure a new or updated product. Especially not, when used for safety functions. Due to that, these types of projects require demonstration which is continuously accounted for during the project and also continues over the life cycle for the product or plant.

In the beginning of the project the Regulator and the licensee must establish a dialog.The required information needed for quality assurance and licensing of the plant are then identified and an agreement on how the accounting through the project will be performed is also made.