IEC 62855:2016

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Electrical power system analyses
6 Off-site power transient stability analyses
7 AC on-site power system analyses
8 DC system and uninterruptible AC system
  analyses
9 Miscellaneous analyses
Annex A (informative) - Establishment of design
        bases for nuclear power plant electrical power
        systems
Annex B (informative) - Guidelines for analytical
        studies
Annex C (informative) - Verification of design bases
        and equipment specification
Annex D (informative) - Example of plant specific
        acceptance criteria
Bibliography

IEC 62855:2016 provides the electrotechnical engineering guidelines for analysis of AC and DC electrical power systems in nuclear power plants (NPPs) in order to demonstrate that the power sources and the distribution systems have the capability for safe operation and shut down of the NPP, bringing it to a controlled state after an anticipated operational occurrence or accident conditions and finally reaching a safe state. This standard is intended to be used:
- for verification of the design of new nuclear power plants;
- for demonstrating the adequacy and impact of major modifications of electrical power systems in operating nuclear power plants;
- and where there is a requirement to assess and establish operating limits and constraints for existing plants.