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    Publications and Reports
    CSNI Status Report and Perspectives: Advances in the Analysis and Management of Accidents and Future Challenges

    10.1787/6b12e37e-en

    The Nuclear Energy Agency (NEA) Working Group on the Analysis and Management of Accidents (WGAMA) aims to contribute to the assessment of the prevention, mitigation and management...

    English Performance assessments WGAMA Nuclear safety Nuclear security Security CSNI PRG Safety assessment CSNI Safety Technology Safety research Knowledge management and data preservation Accident management …
    Published date: 12 June 2025
    News
    NEA seminar on transfer of thermal-hydraulic and severe accident knowledge

    The THICKET-5 seminar was given by the Committee on the Safety of Nuclear Installations.

    Risk assessment News brief WGAMA Accident analysis and management Nuclear safety research CSNI Safety Accident management Risk …
    Published date: 2 June 2025
    Activity
    Working Group on Fuel Safety (WGFS)

    The main mission of the Working Group on Fuel Safety (WGFS) is to advance the current understanding and address cross-cutting issues related to fuel behaviour in accident conditions, including work o...

    Fuel in nuclear safety Nuclear fuel Fuel studies WGAMA WGFCS Fuel cycle facility safety Nuclear safety research CSNI Safety WGFS …
    Published date: 4 April 2025
    Activity
    Working Group on Analysis and Management of Accidents (WGAMA)

    The Working Group on the Analysis and Management of Accidents (WGAMA) focuses on the NEA activities related to potential design-basis and beyond design-basis accidents in nuclear reactors and related...

    Risk assessment WGAMA Accident analysis and management Nuclear safety research CSNI Safety Accident management Risk …
    Published date: 4 February 2025
    NEA Document
    Status Report on Reliability of Thermal-Hydraulic Passive Systems
    NEA/CSNI/R(2021)2

    Passive thermal-hydraulic systems are widely used in nuclear reactor safety and design. For example, primary circuits in existing boiling and pressurised water reactors are designed to take advantage...

    English WGAMA WGRISK Nuclear safety Accident analysis and management Nuclear technology Nuclear safety research CSNI PRG CSNI Safety Risk assessment Thermal hydraulics Accident management …
    Published date: 26 November 2024
    NEA Document
    WGAMA PERSEO Benchmark Results Report
    NEA/CSNI/R(2021)2/ADD

    PERSEO was built at SIET laboratory (Piacenza, Italy) to study a new passive decay heat removal system operating in natural circulation. The main innovation in PERSEO is the presence of two pools con...

    English WGAMA Nuclear safety Accident analysis and management Italy Nuclear safety research CSNI PRG CSNI Safety Accident management Pressurised water reactors …
    Published date: 26 November 2024
    News
    NEA working group holds annual meeting on prevention, mitigation and management of potential accidents

    NEA Working Group on the Analysis and Management of Accidents (WGAMA) held its annual meeting, hosted by the CEA and atttended by nearly 90 delegates from 19 member countries, along with representati...

    News brief CFD WGAMA Accident analysis and management Nuclear safety research CSNI Accident management …
    Published date: 30 September 2024
    Joint project
    Hydrogen Mitigation Experiments for Reactor Safety (HYMERES) Project

    Panda facility under construction. Photo courtesy of the Paul Scherrer Institute

    HYMERES phases

    First phase (2013-2016)

    The main objective of the first phase of the Hydrogen Mitigation Experiments fo...

    WGAMA Nuclear safety Accident analysis and management Thermal hydraulics Hydrogen Nuclear safety research Safety Accident management Safety research …
    Published date: 12 August 2024
    News
    Supporting the use of computational fluid dynamics for nuclear reactor safety

    NEA CFD-Task Group members discussed ongoing activities at a meeting hosted on 11-12 July 2024.

    News brief CFD WGAMA Nuclear safety Safety research …
    Published date: 18 July 2024
    News
    NEA committees make progress, share best practices in the safety assessment and regulation of nuclear facilities

    CSNI and CNRA meetings took place on 4-7 June.

    News brief WGAMA CNRA Nuclear safety Nuclear safety research CSNI Joint project Nuclear safety regulation Safety research …
    Published date: 17 June 2024
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