PD IEC TR 63400:2021 - Page 2

Nuclear facilities. Instrumentation, control and electrical power systems important to safety. Structure of the IEC SC 45A standards series. | Status: Superseded, Withdrawn

1 Scope The IEC SC 45A series of standards include a general description in their Introduction, item d), outlining the overall structure of the series and its relationship with other standards bodies and standards (e.g. specific IAEA safety guides and IEC 61508). This document is intended to augment that description to enable users of individual IEC SC 45A standards to obtain a more comprehensive understanding of the overall structure of the series and its relationship with other standards bodies and standards. This document is organized as follows:

• • Clause 5 outlines the scope of the IEC SC 45A standards series;
• • Clause 6 describes the basic structure of the IEC SC 45A standards series, with particular reference to a hierarchy of levels and subdivision into a set of broad topic areas;
• • Clause 7 presents the structure of the IEC SC 45A standards series in diagrammatic form;
• • Clause 8 introduces and points to three annexes that include:
  1. a) the full set of IEC SC 45A standards in tabular form and numerical order,
  2. b) other (i.e. non IEC SC 45A) documents of particular relevance to IEC SC 45A, and
  3. c) the IEC SC 45A standards in tabular form for each broad topic area.

NOTE In this edition, the documents listed in the annexes and their status correspond to the situation that applied on 1st May 2021.