BS IEC 62859:2016 pdf download.Nuclear power plants – Instrumentation and control systems – Requirements for coordinating safety and cybersecurity.
a) Technical background, main issues and organisation of this standard
l&C systems have evolved during the last decades from non-digital equipment and standalone environments to digital technologies and interconnected systems. Such an evolution exposes them to risks related to cyberattacks. In addition to well-established safety-oriented provisions, more recent cybersecurity requirements and controls now apply to the same systems. A normative framework is needed to master the interactions and potential side- effects when safety and cybersecurity provisions converge on the same I&C systems and architectures, taking into account the nuclear I&C specifics and the SC 45A related standards.
This standard specifically focuses on the issue of requirements for coordinating safety and cybersecurity provisions for I&C programmable digital systems and architectures. It defines both generic principles and guidance for practical situations to integrate cybersecurity requirements in nuclear l&C architectures and systems, fundamentally tailored for safety. Technical but also conceptual, organizational and procedural aspects are covered.
It is intended that this standard be used by designers and operators of nuclear power plants (NPPs) (utilities), systems evaluators, vendors and subcontractors, and by licensors.
b) Situation of the current standard In the structure of the IEC SC 45A standard series
IEC 62859 is at the second level of the IEC SC 45A standard series, It is to be considered as bridging IEC 62645 (also at the second level of the IEC SC 45A standard series) and IEC 61513, the top level document of the IEC sc 45A standard series. Regarding the specific theme of cybersecurity, IEC 62645 is the top-level in the SC 45A standard series. Both IEC 62645 and IEC 62859 are considered formally as second level documents with respect to IEC 61513, although IEC 61513:2011 does not actually ensure proper reference to and consistency with them (this will be done in a future revision of IEC 61513).
For a generic description of the structure of the IEC SC 45A standard series, see item d) of this introduction.BS IEC 62859:2016 pdf download.