IEEE P308/D2, 2019

IEEE P308/D2, 2019 is an approved draft standard focused on criteria for Class 1E power systems used in nuclear power generating stations. It addresses the technical requirements that help define dependable electrical power support for safety-related functions, where consistent design and performance are critical. For engineers, specifiers, and compliance teams, this document provides a structured reference for evaluating system criteria in a nuclear environment where reliability and controlled operation matter.

IEEE P308/D2, 2019 overview

This draft standard sets out criteria for Class 1E power systems, which are associated with nuclear safety applications and the electrical infrastructure that supports them. IEEE P308/D2, 2019 is relevant to the design and assessment of components, circuits, devices, and system-level arrangements where power continuity and functional integrity are important. In practice, it helps define a technical baseline for comparing equipment and engineering decisions against a recognized standard framework in nuclear power generation.

Typical use cases

IEEE P308/D2, 2019 may be used when reviewing or specifying power supply arrangements for nuclear plant safety systems, including distribution elements, control power paths, and related electrical assemblies. It is also useful during design verification, equipment qualification, and procurement of components intended for Class 1E service. Teams working on station electrical systems can use it to align documentation, testing expectations, and configuration decisions with the criteria applicable to nuclear power generating stations.

Why this standard matters

For nuclear power applications, clear criteria for Class 1E systems support consistency in design, testing, and acceptance decisions. IEEE P308/D2, 2019 can help reduce ambiguity when evaluating whether a system or component meets the expected technical basis for safety-related service. Using a defined standard also supports procurement control, engineering review, and compliance activities, especially where reliability and documented performance are essential to operational risk reduction.

• Class 1E power system criteria
• Nuclear power generating stations
• Safety-related electrical infrastructure
• Design, verification, and procurement support