Abstract

This paper is concerned with the certification and licensing of computer based safety systems. It is primarily concerned with software and system aspects rather than the hardware. It considers a recent study sponsored by the CEC on the licensing issues associated with the use of computers in nuclear power stations that concluded that these issues were largely unsolved. This paper discusses these issues and proposes a generic framework for assessing software based on the work of the European Workshop on Industrial Computer Systems (EWICS) committee TC7. It is argued that the resolution of the technical and scientific issues will require the adoption of mathematically formal methods of software development and verification.

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