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    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 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
    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
    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
    Joint project
    Cabri International Project (CIP)

    Cabri Reactor (Commissariat à l’énergie atomique et aux énergies alternatives)

    The Cabri International Project (CIP) began in March 2000 to study the behaviour of nuclear fuel rods and cladding durin...

    Fuel in nuclear safety Nuclear fuel Nuclear safety research CSNI
    Published date: 26 April 2023
    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
    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
    Joint project
    Reduction of Severe Accident Uncertainties (ROSAU) Project

    Left: Test facility for qualification of melt spreading tests. Photo: Argonne National Laboratory (ANL).
    Right: Example of corium melt pouring for a melt spreading preparatory test. Photo: Argonne Nat
    ...

    Accident analysis and management Nuclear safety research CSNI Safety Safety research …
    Published date: 6 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
    Behaviour of Iodine Project 3: Final Summary Report
    NEA/CSNI/R(2020)14

    The present report summarises the main results and learnings from the third phase of the NEA Behaviour of Iodine Project (BIP-3), which was conducted between 2016 and 2019 by the Canadian Nuclear Lab...

    Nuclear safety State-of-the-art report Nuclear safety research CSNI PRG CSNI Joint project Safety Safety research Nuclear safety regulation …
    Published date: 15 February 2023
    NEA Document
    Evaluation of Design and Monitoring Requirements for Vibrations in Safety-Related Fluid Systems
    NEA/CSNI/R(2020)2

    In order to reach a better understanding of countries’ different approaches to the evaluation of vibrations detected in piping systems and components, the NEA Committee on the Safety of Nuclear Insta...

    WGIAGE Nuclear safety Nuclear safety research CSNI PRG CSNI Safety …
    Published date: 15 February 2023
    NEA Document
    Advancing the Robustness of Electrical Power Systems of Nuclear Power Plants
    NEA/CSNI/R(2020)8

    The aim of this report is to examine whether there are any international variations in the electrical power system designs (“design variations”) of nuclear power plants that affect the system respons...

    Nuclear safety WGELEC Nuclear safety research CSNI PRG CSNI Safety Nuclear safety regulation …
    Published date: 13 January 2023
    Joint project
    Studsvik Cladding Integrity Project (SCIP)

    Left: Scheme of Studsvik LOCA test facility Right: Microstructure of fragmented nuclear fuel, Studsvik

    On this page

    • SCIP phases
      • First phase (2004-2009)
      • Second phase (2009-2014)
      • Third phase (2014-2...
    Fuel in nuclear safety Nuclear fuel Fuel cycle facility safety Nuclear safety research CSNI Back-end …
    Published date: 7 December 2022
    Joint project
    International Common-cause Failure Data Exchange (ICDE) Project

    Scheme showing the technical scope of NEA ICDE project activities, NEA 

    Common-cause failure (CCF) events can significantly affect the availability of safety systems of nuclear power plants. In recog...

    Risk assessment Nuclear safety research CSNI Probabilistic risk assessment
    Published date: 30 November 2022
    News
    Progress in reactivity-initiated accident research

    Two new reports from the WGFS highlight the latest developments in RIA research.

    News brief Fuel studies Accident analysis and management Nuclear safety research CSNI WGFS Safety research …
    Published date: 30 November 2022
    Joint project
    Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Station (BSAF) Project

    Units 1 and 2 End of Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company Holdings (4th October, 2011). Photo: Tokyo Electric Power Company Holdings

    The Benchmark Study of the Acci...

    Accident analysis and management Thermal hydraulics Nuclear safety research CSNI Accident management …
    Published date: 25 November 2022
    Joint project
    Preparatory Study on Analysis of Fuel Debris (PreADES) Project

    End state of debris in the units 1-3 of Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company Holdings. Photo: Japan Atomic Energy Agency

    The Preparatory Study on Analysis of Fuel D...

    Fukushima Accident analysis and management Nuclear safety research CSNI Safety Safety research …
    Published date: 25 November 2022
    Joint project
    Advanced Thermal-hydraulic Test Loop for Accident Simulation (ATLAS) Project

    View of the ATLAS experimental loop. KAERI, Korea

    The Advanced Thermal-hydraulic Test Loop for Accident Simulation (ATLAS) Project was referenced in The Fukushima Daiichi Nuclear Power Plant Accident...

    Accident analysis and management Thermal hydraulics Nuclear safety research CSNI Accident management …
    Published date: 25 November 2022
    NEA Document
    Phase III of the Assessment of Structures Subjected to Concrete Pathologies (ASCET): Final Report
    NEA/CSNI/R(2019)11

    In the ASCET Phase III, the goal was to assess and develop the Phase II (blind benchmark) recommendations using additional test results. The Phase III simulations were performed using a full set of t...

    English Structural materials WGIAGE Nuclear safety Nuclear safety research CSNI PRG Safety assessment CSNI Safety …
    Published date: 24 November 2022
    NEA Document
    Summary and Conclusions of the Joint PKL-ATLAS Workshop on Analytical Activities Related to the NEA PKL-4 and ATLAS-2 Projects
    NEA/CSNI/R(2020)13

    Since 2001, the NEA has supported the Senior Expert Group on Safety Research Thermal-hydraulics (SETH), the Primärkreislauf-Versuchsanlage - Primary Coolant Loop Test Facility (PKL), PKL-2 and PKL-3 ...

    Accident analysis and management Thermal hydraulics Nuclear safety research CSNI Accident management …
    Published date: 23 November 2022
    News
    Nuclear Fuel Cycle Facilities Safety Week at the NEA

    Nuclear Fuel Cycle Facilities Safety Week

    IAEA WGFCS CSNI Safety research
    Published date: 7 November 2022
    NEA Document
    Consensus Position on the Impact of Cyber Security Features on Digital Instrumentation and Control Systems Important to Safety at Nuclear Power Plants [CP-08]
    NEA/CNRA/R(2021)2

    The NEA Working Group on Digital Instrumentation and Controls (WGDIC) has agreed that a consensus position on the impact of cyber security features on digital instrumentation and control (I&C) system...

    IAEA CNRA Nuclear safety Digital instrumentation Security WGDIC CSNI Safety International co-operation …
    Published date: 7 November 2022
    NEA Document
    ICDE Topical Report: Collection and Analysis of Multi-Unit Common-Cause Failure Events
    NEA/CSNI/R(2019)6

    This report presents a study performed on a set of common-cause failure (CCF) events within the International Common-cause Failure Data Exchange (ICDE) Project. The topic was multi-unit CCF events.

    T...

    Nuclear safety CSNI PRG CSNI Joint project Safety Safety research …
    Published date: 3 November 2022
    NEA Document
    ICDE Topical Report: Provision Against Common-cause Failures by Improving Testing
    NEA/CSNI/R(2019)5

    This report presents a study performed on a set of common-cause failure (CCF) events within the Nuclear Energy Agency (NEA) International Common-cause Failure Data Exchange (ICDE) Project. The topic ...

    Nuclear safety CSNI PRG CSNI Joint project Safety Safety research …
    Published date: 3 November 2022
    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
    Joint project
    Component Operational Experience, Degradation and Ageing Programme (CODAP)

    Feeders on the Reactor Face in the Feeder Cabinet Photo: Canadian Nuclear Safety Commission (CNSC)

    The Component Operational Experience, Degradation and Ageing Programme (CODAP) combines the follow-u...

    Nuclear safety research LTO CSNI Safety of components and structures
    Published date: 21 October 2022
    Joint project
    Experiments on Source Term for Delayed Releases (ESTER) Project

    CHIP experimental facility to study fission product transport and deposition in the primary circuit. Photo: IRSN

    Following several years of experimental research in the field of source terms analysis...

    Accident analysis and management Nuclear safety research CSNI Joint project Accident management …
    Published date: 21 October 2022
    NEA Document
    Reactivity Initiated Accident Benchmark Phase III Report
    NEA/CSNI/R(2020)10

    Following the recommendations from the technical workshop on “Nuclear Fuel Behaviour during Reactivity-Initiated Accidents” organised by the Nuclear Energy Agency (NEA) in September 2009, a first ben...

    Fuel studies Nuclear safety Nuclear technology Nuclear security Nuclear safety research CSNI PRG CSNI Safety Uncertainty analysis Nuclear safety regulation WGFS …
    Published date: 18 October 2022
    Joint project
    Fukushima Daiichi Nuclear Power Station Accident Information Collection and Evaluation (FACE) Project

    Appearance of Unit 1 and 2 reactor buildings at Fukushima Daiichi Nuclear Power Station of Tokyo Electric Power Company Holdings (June 2022). Photo: Japan Nuclear Regulation Authority

    The FACE projec...

    Fukushima Accident analysis and management Nuclear safety research CSNI Joint project Accident management …
    Published date: 17 October 2022
    Joint project
    Halden Reactor Project - Fuels and Material

    The Halden Reactor Project has been in operation at the Institute for Energy Technology (IFE) in Norway since 1958 and is the oldest NEA joint project. It brings together a large international techni...

    Nuclear fuel Nuclear safety research LTO CSNI Joint project Safety of components and structures …
    Published date: 17 October 2022
    Joint project
    Loss of Forced Coolant (LOFC) Project

    JAEA  High-temperature Engineering Test Reactor Photo: Japan Atomic Energy Agency (JAEA)

     

    The Committee on the Safety of Nuclear Installations (CSNI) Task Group on Advanced Reactor Experimental Facil...

    Generation IV reactors Gas-cooled reactors Accident analysis and management Nuclear safety research CSNI …
    Published date: 11 October 2022
    NEA Document
    NEA CODAP Project Topical Report: A Review of the "Post-1998" Experience with Thermal Fatigue in Heavy Water and Light Water Reactor Piping Components
    NEA/CSNI/R(2019)13

    Since its inception in 2002, the operating experience with thermal fatigue mechanisms has been an intrinsic aspect of the technical scope of CODAP, which is a joint database project within the Commit...

    Nuclear safety Light water reactors Information, data and knowledge management CSNI PRG Databases CSNI Joint project Safety Technology Safety research …
    Published date: 11 October 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
    NEA Document
    Specialists Workshop on Advanced Instrumentation and Measurement Techniques for Experiments Related to Nuclear Reactor Thermal Hydraulics and Severe Accidents (SWINTH-2019)
    NEA/CSNI/R(2021)1

    The Specialists Workshop on Advanced Instrumentation and Measurement Techniques for Experiments Related to Nuclear Reactor Thermal Hydraulics and Severe Accidents (SWINTH-2019), co-organised by the S...

    WGAMA Accident analysis and management Nuclear safety research CSNI
    Published date: 5 October 2022
    News
    Prevention, mitigation and management of potential accidents in nuclear power plants

    Prevention, mitigation and management of potential accidents in nuclear power plants

    News brief CFD WGAMA Accident analysis and management CSNI Accident management …
    Published date: 5 October 2022
    NEA Document
    Concepts and Terminology for Protecting Nuclear Installations from Flood Hazards
    NEA/CSNI/R(2020)9

    This report provides insights from a survey of Nuclear Energy Agency (NEA) member countries on the concepts used to establish effective measures to cope with external flooding hazards and on the term...

    Nuclear safety External hazards External hazards and nuclear safety Nuclear safety research CSNI …
    Published date: 5 October 2022
    Activity
    Committee on the Safety of Nuclear Installations (CSNI)

    The Committee on the Safety of Nuclear Installations (CSNI) is responsible for NEA programmes and activities that support maintaining and advancing the scientific and technical knowledge base of 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 Safety Safety of components and structures …
    Published date: 5 October 2022
    Activity
    Working Group on Fuel Cycle Safety (WGFCS)

    The objective of the Working Group on Fuel Cycle Safety (WGFCS) is to advance the understanding of relevant aspects of nuclear fuel cycle safety, including: uranium mining and milling; uranium refini...

    WGFCS Fuel cycle facility safety Nuclear safety research CSNI Safety Nuclear fuel cycle …
    Published date: 4 October 2022
    Event
    International Workshop on Process and Safety Improvements Experienced in Fuel Cycle Facilities since 2010
    3 - 4 October 2022
    OECD Nuclear Energy Agency, 46 Quai Alphonse le Gallo, 92100 Boulogne-Billancourt

    The Working Group on Fuel Cycle Safety (WGFCS) of the Nuclear Energy Agency (NEA) Committee on the Safety of Nuclear Installations (CSNI) held an international workshop on Process and Safety Improvem...

    WGFCS Fuel cycle facility safety Nuclear safety research CSNI
    Published date: 3 November 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
    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
    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
    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
    NEA Document
    ICDE Topical Report: Collection and Analysis of Intersystem Common-Cause Failure Events
    NEA/CSNI/R(2020)1

    This report presents a study performed on a set of common-cause failure (CCF) events within the International Common-Cause Failure Data Exchange (ICDE) project. The topic of the study was intersystem...

    Nuclear safety Nuclear safety research CSNI
    Published date: 21 June 2022
    News
    Joint NEA-IAEA symposium on probabilistic safety assessment for singular design reactors

    The joint NEA-IAEA symposium hosted by the United Kingdom’s Office for Nuclear Regulation brought together experts to exchange on the use and application of Probabilistic Safety Analysis (PSA) for re...

    News brief IAEA WGRISK Safety assessment CSNI Probabilistic risk assessment Reactor design …
    Published date: 14 June 2022
    News
    Experts discuss nuclear safety and regulatory issues

    CSNI and CNRA held their biannual meetings and a joint session at the NEA headquarters.

    News brief Nuclear installations CNRA Nuclear safety Regulation Nuclear safety research CSNI Nuclear safety regulation …
    Published date: 10 June 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
    News
    Probabilistic safety assessment for singular design reactors

    Joint NEA and IAEA event will explore probabilistic safety assessment for reactors of singular designs

    News brief IAEA WGRISK Safety assessment CSNI Probabilistic risk assessment Reactor design …
    Published date: 28 April 2022
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