EPR Working Group (EPRWG)

The MDEP EPR Working Group (EPRWG) had been in operation even before the MDEP Policy Group formally approved the MDEP in March 2008. The group was focused on the safety design review of the EPR design.

The following national regulatory authorities participated in the EPRWG :

• Finland
• France
• India
• People's Republic of China
• United Kingdom

The members exchanged information about their safety reviews in areas such as review and construction status, the digital instrumentation and control for safety systems, the probabilistic safety analyses, the severe accidents evaluation, accidents and transients methodologies and evaluations, internal hazards, human factors, and technical specifications (see the EPRWG programme plan below for more details of the group's work). The working group also discussed issues related to the Fukushima accident lessons learnt.

The EPRWG reported its status to the MDEP Steering Technical Committee (STC) at the latter's thrice annual meetings.

The MDEP EPRWG's main stakeholders included:

• Framatome (Ex AREVA) and EDF, France
• NNB GenCo, UK
• TNPJVC (Taishan Nuclear Power Joint Venture Company), People's Republic of China
• TVO, Finland

Accomplishments

For more information, see the MDEP Annual Report: 2018-2019.

Programme plan

2020-2022 Programme Plan

Products

Technical Reports

• TR-EPRWG-07: 2A-LOCA assessment, May 2020
• TR-EPRWG-06: Hydrogen Management for EPR, May 2020
• TR-EPRWG-05: First-Plant-Only-Tests (FPOT) considered for EPR, June 2018
• TR-EPRWG-04: Limited Comparison of EPR PSA, November 2017
• TR-EPRWG-03: Definition of primary coolant source terms used in the different EPR designs, October 2015
• TR-EPRWG-02: Insights from PSA Comparison in Evaluation of EPR Designs, paper presented by the Chairman of the EPR technical experts' subgroup on probabilistic safety assessment at the PSAM 12 meeting in June 2014 (Update of 20 November 2014)
• TR-EPRWG-01: Survey on the regulatory approaches and criteria used in the analysis of accidents and transients in MDEP EPRWG member countries (Update of 20 November 2014)

Common Positions

• CP-EPRWG-01: EPR Instrumentation and Control, May 2020 (update of December 2010)
• CP-EPRWG-07: Vienna Declaration on Nuclear Safety, April 2018
• CP-EPRWG-06: EPR boron dilution during a Small Break Loss Of Coolant Accident (SBLOCA), April 2018
• CP-EPRWG-05: Design specific common position on the EPR IRWST pH Control in Accident Conditions (Update of 16 March 2015)
• CP-EPRWG-04: Design specific common position on the EPR Containment Heat Removal System in Accident Conditions (Update of 16 March 2015)
• CP-EPRWG-03: Design specific common position on the EPR Containment Mixing (Update of 16 March 2015)
• CP-EPRWG-02: Design specific common position addressing Fukushima Daiichi-related issues regarding the EPR design, October 2015
• CP-EPRWG-01: Design specific common position on DI&C design of the EPR, December 2010

Last reviewed: 12 October 2022