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

    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 of accidents, ultim...

    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: 5 October 2023
    NEA Document
    Extension of CFD Codes Application to Two-Phase Flow Safety Problems – Phase 3
    NEA/CSNI/R(2014)13/REV1

    This document is an extension of the NEA/SEN/SIN/AMA(2006)2 report produced by the Writing Group 3 on the extension of CFD to two-phase flow safety problems, which was formed following the recommen...

    English CFD WGAMA Nuclear safety research CSNI …
    Published date: 1 November 2014
    Activity
    Expert Group on Small Modular Reactors (EGSMR)

    With the growing importance of SMRs, following the proposal of the CSNI Bureau, the CSNI has decided to create an Expert Group on SMRs (EGSMR), at its 69th meeting held on 2-3 June 2021.

    SMR EGSMR Nuclear safety research CSNI
    Published date: 7 April 2023
    NEA Document
    Computational Fluid Dynamics for Nuclear Reactor Safety (CFD4NRS-8) Workshop, 25-27 November 2020
    NEA/CSNI/R(2022)2

    The eighth instalment of the workshop on computational fluid dynamics for nuclear reactor safety (CFD4NRS-8) was organised by the Nuclear Energy Agency (NEA) Committee on the Safety of Nuclear Instal...

    WGAMA Nuclear safety Nuclear safety research CSNI Safety Safety research CFD …
    Published date: 28 August 2023
    Activity
    Working Group on External Events (WGEV)

    The main mission of the Working Group on External Events (WGEV) is to improve the understanding and treatment of external hazards that would support the continued safety performance of nuclear instal...

    Risk assessment WGRISK External hazards WGEV External hazards and nuclear safety Nuclear safety research CSNI Safety Risk …
    Published date: 10 February 2022
    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: 21 July 2023
    NEA Document
    Cold Leg Mixing Computational Fluid Dynamics – Uncertainty Quantification (CLM-UQ) Benchmark Results
    NEA/CSNI/R(2020)7

    The cold leg mixing computational fluid dynamics (CFD) – uncertainty quantification (CLM-UQ) benchmark is the fifth benchmark concerning CFD applications to nuclear reactor safety to be organised in ...

    WGAMA Nuclear safety Nuclear safety research CSNI
    Published date: 3 November 2022
    Event
    Joint NEA and IAEA International Symposium on PSA for Reactors of Singular Designs
    7 - 9 June 2022
    Liverpool, United Kingdom

    The Symposium is free of charge for all participants and is scheduled to take place in person at the ONR’s offices near Liverpool in the United Kingdom. 

     

    Key Dates

    31 March 2022  Deadline for a...
    SMR IAEA WGRISK Nuclear safety CSNI Safety Reactor design …
    Published date: 6 April 2022
    Other
    Effective Nuclear Regulation and Safety Management in a Pandemic
    Nuclear safety Regulation Nuclear safety research CSNI COVID-19 Nuclear safety regulation …
    Published date: 30 September 2022
    NEA Document
    Summary Report of the NEA ATLAS-2 Joint Project
    NEA/CSNI/R(2021)6

    Within the context of the Nuclear Energy Agency (NEA) Advanced Thermal-hydraulic Test Loop for Accident Simulation (ATLAS) project, a series of tests were performed to resolve key thermal-hydraulic s...

    Nuclear safety Thermal hydraulics CSNI Joint project Safety Safety research …
    Published date: 18 February 2022
    News
    Experts meet to discuss scientific and technical aspects in the field of nuclear installations safety

    Around 50 delegates from 22 countries and 2 international organisations gathered on 6-7 June 2023 for the 73rd CSNI meeting.

    News brief Nuclear safety Nuclear safety research CSNI Safety research …
    Published date: 14 June 2023
    NEA Document
    SAPIUM: Development of a Systematic Approach for Input Uncertainty Quantification of the Physical Models in Thermal-Hydraulic Codes: Good Practice Guidance
    NEA/CSNI/R(2020)16

    In the current project, a new systematic approach has been developed, called SAPIUM (systematic approach for input uncertainty quantification methodology) for transparent and rigorous model IUQ. This...

    English Nuclear installations WGAMA Nuclear safety Nuclear accident loss estimation CSNI PRG CSNI Joint project Safety Accident management …
    Published date: 30 May 2023
    Joint project
    Halden Human Technology Organisation (HTO) Project

    The Halden Reactor Project has been in operation since 1958 and is the oldest NEA joint project. It brings together an important international technical network in the area of nuclear safety ranging ...

    Risk assessment Accident analysis and management Fuel cycle facility safety Nuclear safety research CSNI Safety Safety of components and structures Safety research …
    Published date: 23 May 2023
    Activity
    Working Group on Risk Assessment (WGRISK)

    The Working Group supports improved uses of Probabilistic Safety Assessment (PSA) in risk-informed regulation and safety management through the analysis of results and the development of perspectives...

    Risk assessment WGRISK Nuclear safety research CSNI Safety …
    Published date: 20 July 2022
    NEA Document
    New Devices for Electrical Equipment Replacement/Retrofits and New Build
    NEA/CSNI/R(2021)3

    Recent operating experience in nuclear power plants has shown that there is a safety concern associated with the use of new industrial devices, including digital devices, in safety power systems in b...

    WGELEC Safety of electrical systems Nuclear safety research CSNI
    Published date: 15 May 2023
    Activity
    CSNI Programme Review Group (CSNI PRG)

    The Programme Review Group is established to perform a programme quality review function within the Committee on the Safety of Nuclear Installations (CSNI) and to provide scientific assistance to the...

    Fuel in nuclear safety Risk assessment Accident analysis and management Fuel cycle facility safety Safety of electrical systems External hazards and nuclear safety Nuclear safety research CSNI PRG CSNI Safety of components and structures …
    Published date: 7 July 2022
    Joint project
    High Energy Arcing Fault Events (HEAF) Project

    A cabinet containing copper bus before the HEAF test (left) and after the test(right). Source: NRC

    Massive electrical discharges, referred to as high energy arcing faults (HEAF), have occurred in nuc...

    Risk assessment Electrical systems Fuel cycle facility safety Safety of electrical systems Nuclear safety research CSNI …
    Published date: 19 April 2023
    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: 5 April 2023
    NEA Document
    Prestressed Concrete Reactor Containment Behaviour in Test Condition Taking into Account Ageing Effects (VeRCoRs)
    NEA/CSNI/R(2019)15

    The VeRCoRs facility mock-up is a reactor containment building at 1/3 scale. The mock-up is instrumented so that its behaviour is monitored from the beginning of construction. More than 700 sensors a...

    English WGIAGE Nuclear safety Nuclear safety research CSNI PRG CSNI Safety Safety research …
    Published date: 27 September 2022
    NEA Document
    OECD/NEA X-FEM Benchmark Final Report
    NEA/CSNI/R(2020)11

    This report summarises the work done for the activity: “Benchmark analysis on the eXtended Finite Element Method (X-FEM) calculation technology in its use to evaluate the fracture mechanics stress in...

    WGIAGE Nuclear safety CSNI Safety Technology Safety research …
    Published date: 6 October 2022
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