IEC 60880:2006 Nuclear power plants - Instrumentation and control systems important to safety - Software aspects for computer-based systems performing category A functions
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 functions of the highest category
implemented.
For software of I&C system performing only category B and C functions in NPP as defined by
IEC 61226, requirements and guidance of IEC 62138 are applicable.
This standard provides requirements for the purpose of achieving highly reliable software. It
addresses each stage of software generation and documentation, including requirements
specification, design, implementation, verification, validation and operation.
The principles applied in developing these requirements include:
– best available practices;
– top-down design methods;
– modularity;
– verification of each phase;
– clear documentation;
– auditable documents;
– validation testing.
Additional guidance and information on how to comply with the requirements of the main part
of this standard is given in Annexes A to I.
IEC 60880:2006 history
2006IEC 60880:2006 Nuclear power plants - Instrumentation and control systems important to safety - Software aspects for computer-based systems performing category A functions
1986IEC 60880:1986 Software for computers in the safety systems of nuclear power stations