Nuclear power plants. Instrumentation and control systems important to safety. Software aspects for computer-based systems performing category A functions Ingestion-build-48024 and reference is not made

and reference is not made to the details thereof in ISO 27306

• by legislative or regulatory bodies

With factual information

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Nuclear power plants. Instrumentation and control systems important to safety. Software aspects for computer-based systems performing category A functions Ingestion-build-48024 and reference is not made1 Scope and object This International Standard provides requirements for the software of computer based I&C systems of nuclear power plants performing functions of safety category A as defined by IEC 61226. According to the definition in IEC 61513, I&C systems of safety class 1 are basically intended to support category A functions, but may also support functions of lower categories. However the system requirements are always determined by the