The main mission of the Working Group on the Safety of Electrical Systems (WGELEC) is to advance the current understanding and address safety issues related to electrical systems of nuclear installations. The activity of the Working Group aims at enhancing the safety performance of nuclear installations and improving the effectiveness of regulatory practices in NEA member countries.
The Working Group reports to the Committee on the Safety of Nuclear Installations (CSNI) and assist that Committee with its work. The Working Group also collaborates with, and respond to requests from, the Committee on Nuclear Regulatory Activities (CNRA) and other working groups of the CSNI.
The WGELEC meets on an annual basis to review progress of its programme of work and identify activities that should be added to the programme of work, subject to CSNI approval. The Working Group is led by a chair, supported by a bureau of up to four of the leading members of the Working Group. Specifically, the WGELEC:
The scope of the Working Group is all equipment located within a nuclear installation and provided for the purpose of generating, transmitting and distributing the electricity necessary for the achievement of safety functions (i.e. the plant power system). This scope includes batteries, emergency power systems, generators, cables, switchboards, transformers, breakers, protective relaying, etc. It also encompasses Instrumentation and Control (I&C) equipment specifically needed to manage this electricity supply function. Additionally, the loads supplied (motors, drives, sensors, relays, computers, etc.) are also within the scope of the Working Group but only regarding their electrical characteristics.
The WGELEC considers safety aspects ranging from issues specific to a given type of equipment up to considerations regarding the overall behaviour of a nuclear installation’s electrical power system.
The WGELEC activities mainly focus on issues affecting existing reactors and fuel cycle installations, but also consider their applicability for new installations, in particular advanced reactor designs.