Working Group on Electrical Power Systems (WGELEC)


The main mission of the Working Group on Electrical Power 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 shall aim at enhancing the safety performance of nuclear installations and improving the effectiveness of regulatory practices in NEA member countries.

The working group shall report to the Committee on the Safety of Nuclear Installations (CSNI) and assist that committee with its work. The working group shall prepare an integrated plan for its activities consistent with the mandate as well as the CSNI technical goals, and shall update this at regular intervals. The working group will also collaborate with, and respond to requests from, the Committee on Nuclear Regulatory Activities (CNRA) and other working groups of the CSNI. The WGELEC integrated plan will be approved by the CSNI. In delivering its mission, the WGELEC will seek to address the challenges identified in the CSNI Operating Plan.

The WGELEC will meet on an annual basis to review progress against its integrated plan and identify activities that should be added to the integrated plan, subject to CSNI approval.  The working group will be led by a chair, supported by a bureau of up to four of the leading members of the working group. Specifically, the WGELEC shall:

  1. Constitute a forum for exchange of information and experience on the safety of electrical systems in member countries, thereby promoting co-operation and maintaining an effective and efficient network of experts.

  2. Identify and prioritise issues related to the safety of electrical systems which highlight a gap in international knowledge requiring research.

  3. Identify those issues that appear most suitable to be addressed by WGELEC in a co-ordinated way across the international community.

  4. Facilitate international convergence on safety issues related to the safety of electrical systems and, where practicable, seek to develop a shared understanding and recommended solutions on important issues.

  5. Compare and, where possible, benchmark practices and methodologies currently applied by member countries in the safety assessment of electrical systems.

  6. Allow prompt attention to evolving electrical plant events in order to share the lessons as they are learnt.

  7. Collaborate with and support cross-cutting initiatives proposed by other NEA groups. Ensure that the CNRA and other bodies are consulted as appropriate when potential cross-cutting work on the safety of electrical systems is proposed by the WGELEC.

  8. Facilitate specialist meetings, workshops and other means of fostering international collaboration with nuclear and other industries, where appropriate, to further its objectives.

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. plant power system). This scope includes: batteries, emergency power systems, generators, cables, switchboards, transformers, breakers, protective relaying, etc. It also encompasses instrumentation and control equipment specifically needed to manage this electricity supply function. Additionally, the loads supplied (motors, drives, sensors, relays, computers…) are also within the scope of the working group but only regarding their electrical characteristics.

The working group will consider 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 working group activities will mainly focus on issues affecting existing reactors and fuel cycle installations, but will also consider their applicability for new installations, in particular advanced reactor designs.

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Last reviewed: 11 January 2017