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    Event
    21st Meeting of the Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS)
    19 - 23 February 2024
    NEA headquarters (46, quai Alphonse Le Gallo, 92100 Boulogne-Billancourt, France)

    Under the guidance of the Nuclear Science Committee (NSC), the Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS) studies the reactor physics, fuel performance, an...

    Nuclear science EGRFP EGRRS WPRS Multiphysics Radiation transport and shielding Thermal hydraulics and mechanics EGTHM Reactor physics Reactor fuel performance EGMUP NSC Nuclear science …
    Published date: 18 July 2023
    Event
    16th Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation (16IEMPT)
    24 - 27 October 2023
    NEA Headquarters, Boulogne-Billancourt, France

    The NEA is organising the 16th Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation (16IEMPT) on 24-27 October 2023. The meeting will be held at the NEA offices...

    Nuclear fuel WPFC Fission products Chemistry Actinides Advanced reactors Minor actinides NSC Back-end Nuclear fuel cycle Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 27 July 2023
    Activity
    Burn-up credit and nuclear criticality safety

    Burn-up credit is a safety approach that accounts for the reduction in the reactivity of configurations with spent nuclear fuel due to the change in their composition after irradiation.

    Criticality safety NSC Nuclear science Criticality WPNCS …
    Published date: 11 September 2023
    Activity
    WPFC Expert Group on Fuel Recycling and Waste Technology (EGFRW)

    Under the guidance of the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC), the Expert Group on Fuel Recycling and Waste Technology (EGFRW) focuses on the separation processes releva...

    Nuclear fuel WPFC EGFRC Fuel studies NSC Nuclear science Partitioning and transmutation EGFRW Fuel cycle physics and chemistry …
    Published date: 28 August 2023
    Activity
    WPFC Expert Group on Advanced Fuel Cycle Scenarios (EGAFCS)

    Under the guidance of the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC), the Expert Group on Advanced Fuel Cycle Scenarios (EGAFCS) studies the needs associated with the transitio...

    Nuclear fuel WPFC Fuel studies NSC Nuclear science EGAFCS Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 28 August 2023
    Activity
    WPFC Expert Group on Innovative Fuel Elements (EGIFE)

    Under the guidance of the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC), the Expert Group on Innovative Fuel Elements (EGIFE) conducts joint and comparative studies to identify te...

    Nuclear fuel WPFC Fuel studies NSC EGIFE Nuclear science EGIF Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 28 August 2023
    Activity
    WPFC Expert Group on Reactor Coolants/Components Technology (EGCoCoT)

    Under the guidance of the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC), the Expert Group on Reactor Coolants and Components Technology (EGCoCoT) undertakes activities to collect,...

    Nuclear fuel WPFC EGLM Fuel studies NSC Nuclear science EGCoCoT Liquid metal reactors Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 28 August 2023
    Activity
    Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC)

    The Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC) studies advanced nuclear fuel cycles, including fuel cycle scenarios, innovative fuels and materials, separation chemistry, waste...

    Nuclear fuel WPFC Fuel studies NSC Nuclear science Liquid metal reactors Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 28 August 2023
    Activity
    Working Party on International Nuclear Data Evaluation Co-operation (WPEC)

    The NEA's nuclear data evaluation co-operation activities involve the following evaluation projects: ENDF (United States), JENDL (Japan), ROSFOND/BROND (Russia), JEFF (other Data Bank member countrie...

    NSC Nuclear science Nuclear data
    Published date: 28 August 2023
    News
    The demise of zero power reactors: Addressing reduced experimental capabilities

    The NEA workshop gathered experts to discuss the challenges and opportunities related to the demise of zero power reactors.

    NSC Nuclear science WPRS Nuclear science
    Published date: 4 July 2023
    Event
    The demise of zero power reactors: From concern to action
    22 - 23 June 2023
    IRSN, Fontenay-aux-Roses, France

    In the early decades of nuclear reactor development, many countries built and operated zero-power facilities in which many different critical arrangements of materials were studied. These flexible ex...

    NSC Nuclear science WPRS Nuclear science
    Published date: 6 June 2023
    News
    Challenging state-of-the art thermal hydraulics simulation capabilities for high temperature gas-cooled reactors

    Kick-off workshop of the thermal hydraulic code validation benchmark for high temperature gas-cooled reactors using High Temperature Test Facility (HTTF) data.

    News brief Nuclear science WPRS Thermal hydraulics and mechanics EGTHM Reactor physics Reactor physics NSC Thermal hydraulics Nuclear science Benchmark …
    Published date: 16 June 2023
    Event
    International workshop on thermal hydraulic code validation benchmark for high temperature gas-cooled reactors using HTTF data (HTGR T/H)
    5 - 6 June 2023
    Oregon State University, Corvallis, Oregon, United States

    The NEA thermal hydraulic code validation benchmark for high temperature gas-cooled reactors using HTTF data (HTGR T/H), supervised by the Expert Group on Reactor Core Thermal-Hydraulics and Mechanic...

    Nuclear science Thermal hydraulics and mechanics Reactor physics Reactor physics NSC Thermal hydraulics Verification and validation Verification Validation Benchmark …
    Published date: 20 April 2023
    Activity
    Working Party on Materials Science Issues in Nuclear Fuels and Structural Materials (WPFM)

    Under the guidance of the Nuclear Science Committee (NSC), the Working Party on Materials Science Issues in Nuclear Fuels and Structural Materials (WPFM) addresses materials science aspects of nuclea...

    Nuclear fuel Material science Structural materials NSC Nuclear science Materials science WPFM Nuclear science Accident tolerant fuels …
    Published date: 1 June 2023
    Activity
    Nuclear Science Committee Programme Review Group (NSC PRG)

    Established to help fulfil the objectives of the Agency and the Nuclear Science Committee (NSC), the NSC Programme Review Group (PRG) formulates recommendations based on best practices to optimise ac...

    NSC Nuclear science Nuclear science
    Published date: 4 May 2023
    News
    NEST Alumni share valuable lessons from their fellowships

    NEST Alumni share valuable lessons from their fellowships

    DG statement NSC Education Nuclear Education, Skills and Technology (NEST) Framework Director-General …
    Published date: 25 April 2023
    News
    ICSBEP and IRPhEP Technical Review Group meetings

    The Technical Review Groups for both projects met at the NEA headquarters on 3-7 April 2023.

    News brief Nuclear science Criticality ICSBEP IRPhEP Reactor physics Reactor physics Criticality safety NSC SINBAD Nuclear science Benchmark …
    Published date: 24 April 2023
    News
    Members of NEA Second Framework for Irradiation Experiments (FIDES-II) meet in Czech Republic

    Members of FIDES-II from 12 countries assembled in Prague, Czech Republic, on 17-21 April 2023 for meetings of its Technical Advisory Group and Governing Board.

    Fuel in nuclear safety Nuclear fuel News brief Nuclear science Nuclear safety FIDES Reactor fuel performance NSC Nuclear science Accident Tolerant Fuels Accident tolerant fuels …
    Published date: 21 April 2023
    NEA Document
    Benchmark for Uncertainty Analysis in Modelling (UAM) for Design, Operation and Safety Analysis of Light Water Reactors: Volume I. Neutronics Phase (Phase I)
    NEA/NSC/R(2021)5

    Since the early 2000s there is an increasing demand from nuclear research, industry, safety and regulation for best-estimate predictions to be provided with their confidence bounds. Consequently, an ...

    Reactor physics NSC Nuclear science EGPRS WPRS Nuclear science Benchmark …
    Published date: 18 April 2023
    Activity
    DATabase for IFpe (DATIF)

    Development started on DATIF, the DATabase for IFpe, in 2018 in order to enhance accessibility to the IFPE legacy collection of integral fuel performance experiments data, jointly put together by the...

    Nuclear fuel Physics Fuel studies NSC EGRFP Databases Ancillary data Reactor physics Integral experiments …
    Published date: 12 April 2023
    News
    Enhancing the NEA Shielding Integral Benchmark Archive and Database (SINBAD)

    EGPRS Task Force members met on 3 April 2023.

    Reactor physics News brief NSC Nuclear science Radiation shielding EGPRS SINBAD WPRS Reactor physics …
    Published date: 7 April 2023
    NEA Document
    Benchmark Study on Innovative Fuels for Fast Reactors with Fuel Performance Codes
    NEA/NSC/R(2022)5

    This report presents the results of a benchmark study on innovative fuels for fast reactors using fuel performance codes. Irradiation results were shared among participants of the expert group and co...

    WPFC Fuel studies NSC Nuclear science Nuclear science Benchmark Reactor fuel performance Fuel cycle physics and chemistry …
    Published date: 3 April 2023
    News
    Discussing scientific issues in the design and qualification of reactor systems

    The WPRS met from 20-24 February 2023.

    News brief NSC Nuclear science SINBAD WPRS Multiphysics Nuclear science Benchmark Multiphysics …
    Published date: 17 March 2023
    Activity
    Expert Group on Fuel Materials (EGFM)

    Under the guidance of the Working Party on Materials Science Issues in Nuclear Fuels and Structural Materials (WPFM), the Expert Group on Fuel Materials (EGFM) focuses on materials science aspects of...

    Nuclear fuel Material science NSC Nuclear science Materials science WPFM Nuclear science Accident tolerant fuels …
    Published date: 3 March 2023
    Activity
    Expert Group on Structural Materials (EGSM)

    Under the guidance of the Working Party on Materials Science Issues in Nuclear Fuels and Structural Materials (WPFM), the Expert Group on Structural Materials (EGSM) focuses on materials science aspe...

    Material science Structural materials NSC Nuclear science Materials science WPFM Nuclear science …
    Published date: 3 March 2023
    News
    Expert groups on structural and fuel materials meet to advance materials science activities

    Expert groups on structural and fuel materials meet to advance materials science activities

    News brief Fuel studies Nuclear science Materials science Databases Material science NSC WPFM Accident tolerant fuels …
    Published date: 24 February 2023
    News
    Improving thermodynamic databases and materials modelling for the analysis and prevention of nuclear accidents

    Thermodynamic databases and accident prevention

    News brief Fuel studies Nuclear science Materials science Fukushima Joint project Reactor fuel performance Material science NSC Thermodynamic data TCOFF …
    Published date: 24 February 2023
    News
    Internationally recognised thermodynamic data to advance nuclear materials knowledge

    International experts gathered at the NEA for the commencement of the third phase TAF-ID on 16-17 February 2023.

    News brief Fuel studies Nuclear science Materials science Nuclear data Joint project Material science NSC Thermodynamic data TAF-ID …
    Published date: 24 February 2023
    NEA Document
    Statistical Tests for Diagnosing Fission Source Convergence and Undersampling in Monte Carlo Criticality Calculations
    NEA/NSC/R(2021)3

    Monte Carlo criticality calculations involve a two-step procedure based on a stochastic implementation of the power iteration method: first, achieve convergence of the fission source distribution dur...

    Criticality safety Monte Carlo method NSC Nuclear science Criticality WPNCS Nuclear science …
    Published date: 17 February 2023
    Activity
    Expert Group on Accident-tolerant Fuels for Light Water Reactors (EGATFL)

    The expert group primarily acted as a forum for scientific and technical information exchange on advanced light water reactor (LWR) fuels with enhanced accident tolerance.

    Fuel studies NSC Nuclear science Light water reactors EGATFL Accident Tolerant Fuels Accident tolerant fuels …
    Published date: 18 October 2022
    Activity
    WPEC Expert Group on the High Priority Request List (EGHPRL) for Nuclear Data

    The expert group is responsible for managing the activities related to the High Priority Request List (HPRL) for nuclear data, in particular for guaranteeing that the entries are up-to-date and well-...

    WPEC Measurement NSC Nuclear science Nuclear data …
    Published date: 20 September 2022
    Activity
    WPEC Expert Group on the Recommended Definition of a General Nuclear Database Structure (EGGNDS)

    The expert group was established to develop a nuclear data structure definition that can meet the needs of a broad set of nuclear data users and providers.

    WPEC NSC Nuclear science Nuclear data
    Published date: 20 September 2022
    Activity
    Working Party on Nuclear Criticality Safety (WPNCS)

    The Working Party on Nuclear Criticality Safety (WPNCS) deals with technical and scientific issues relevant to criticality safety. Specific areas of interest include (but are not limited to) investig...

    Criticality safety NSC Nuclear science Criticality
    Published date: 17 May 2022
    NEA Document
    Shielding Aspects of Accelerators, Targets and Irradiation Facilities (SATIF-14)
    NEA/NSC/R(2021)2

    Proceedings of the Fourteenth Workshop, 30 October-2 November 2018, Gyeongju, Korea.

    English Nuclear science Radiation shielding WPRS Proceedings Reactor physics Reactor physics NSC EGPRS Nuclear science …
    Published date: 16 December 2021
    NEA Document
    Shielding Aspects of Accelerators, Target and Irradiation Facilities (SATIF-13) - Proceedings of the Thirteenth Meeting, 10-12 October 2016, Dresden, Germany
    NEA/NSC/R(2018)2
    English Reactor physics NSC Nuclear science Radiation shielding EGPRS WPRS Nuclear science Proceedings Reactor physics …
    Published date: 8 December 2021
    Activity
    Expert Group on Multi-physics Experimental Data, Benchmarks and Validation (EGMPEBV)

    The expert group dealt with the activities associated with the certification of experimental data and benchmark models along with establishing the processes and procedures for using the data and benc...

    Multi-physics simulations NSC Nuclear science Verification and validation Validation Information, data and knowledge management Nuclear data Benchmark Multiphysics …
    Published date: 23 November 2021
    NEA Document
    Coupled Neutronic/Thermal-Fluid Benchmark of the MHTGR-350 MW Core Design: Results for the Lattice Physics Exercises
    NEA/NSC/R(2019)6

    The purpose of this prismatic High Temperature Reactor (HTR) benchmark is to provide a solution set that can be used in future code benchmarking and to better understand the effects induced by the pr...

    English Nuclear science WPRS Multiphysics EGTHM Reactor physics Multiphysics EGMUP Reactor physics NSC EGPRS Nuclear science …
    Published date: 18 November 2021
    Activity
    Expert Group on Integral Experiments for Minor Actinide Management (EGIEMAM)

    The expert group critically reviewed integral experiments for validating minor actinide (MA) nuclear data, recommended additional integral experiments needed for validating MA nuclear data and invest...

    WPFC WPEC Nuclear science Experiments Actinides WPRS Reactor physics Integral experiments Minor actinides NSC Nuclear fuel cycle Fuel cycle physics and chemistry …
    Published date: 5 March 2021
    NEA Document
    Summary Report of the Fifth Workshop on Structural Materials for Innovative Nuclear Systems
    NEA/NSC/R(2020)1

    Since 2007, the NEA has organised a series of workshops on structural materials for innovative nuclear systems (SMINS). The fifth meeting, held from 8‑11 July 2019 in Kyoto, Japan, was hosted by Kyot...

    Structural materials NSC Materials science Innovation
    Published date: 26 November 2020
    Publications and Reports
    Physics of Plutonium Recycling - Volume III

    The quality of the isotopic composition of plutonium fuel degrades as the number of recycles increases in thermal reactors, requiring an increase in the total loading necessary in mixed plutonium-ura...

    English Nuclear science Plutonium Liquid metal reactors Advanced reactors Reactor physics Recycling and reuse Reactor physics NSC Gas-cooled reactors Fuel cycle technology Fuel cycle physics and chemistry Pressurised water reactors …
    Published date: 17 November 2020
    NEA Document
    Structural Materials Data Management Survey
    NEA/NSC/R(2019)3

    The Nuclear Energy Agency (NEA) Expert Group on Liquid Metal Technology (EGLM) conducted a survey to identify and establish common criteria and understanding on the complex issue of materials data se...

    WPFC EGLM Nuclear energy data NSC
    Published date: 20 October 2020
    NEA Document
    Coupled Neutronic/Thermal-Fluid Benchmark of the MHTGR-350 MW Core Design: Results for Phase I Exercise 1
    NEA/NSC/R(2019)5
    Reactor physics NSC Nuclear science EGPRS WPRS Nuclear science EGTHM Reactor physics EGMUP …
    Published date: 12 October 2020
    NEA Document
    Used Nuclear Fuel Criticality Safety Benchmark SiO2 Reflector Effect: The Reflector Effect of Silicon Dioxide (SiO2) for the Criticality Safety of Direct Disposal of Used Nuclear Fuel
    NEA/NSC/R(2019)4
    NSC
    Published date: 12 October 2020
    News
    Advancing nuclear science: Nuclear Science Committee (NSC) annual meeting

    NEA Nuclear Science Committee (NSC) meeting, 23-25 September 2020.

    News brief NSC Nuclear science
    Published date: 9 October 2020
    Publications and Reports
    NEA News 38.1

    NEA News is the professional journal of the Nuclear Energy Agency (NEA). It features articles on the latest nuclear energy issues concerning the economic and technical aspects of nuclear energy, nucl...

    English Physics Nuclear energy data Public health Environmental protection Cost estimation Fukushima Disposal International co-operation Radioactive waste Radioactive waste management NSC Webinar Cost control Data Bank Nuclear economics Accident management …
    Published date: 1 October 2020
    NEA Document
    State-of-the-Art Report on Multi-scale Modelling Methods
    NEA/NSC/R(2019)2
    Material science NSC Nuclear science Materials science Nuclear science …
    Published date: 29 September 2020
    NEA Document
    Processing Covariance Data for the Resonance Region
    NEA/NSC/R(2020)3

    The following report is issued by WPEC Subgroup 28, which builds upon the work of the previous Subgroup 20 for developing new methods for cross-section covariance evaluation. Subgroup 28 was tasked w...

    NSC Nuclear science Nuclear data Nuclear science
    Published date: 28 September 2020
    News
    New NEA reports on nuclear data evaluation

    New NEA reports on nuclear data evaluation

    News brief Nuclear energy data WPEC NSC Nuclear science Nuclear data …
    Published date: 5 August 2020
    Other
    Source Convergence in Criticality Safety Analyses - Phase II: Guidance for Analysts

    Source Convergence in Criticality Safety Analyses - Phase II: Guidance for Analysts

    Criticality safety NSC Criticality WPNCS
    Published date: 24 March 2020
    NEA Document
    Document content and format guide for the International Criticality Safety Benchmark Evaluation Project (ICSBEP)
    NEA/NSC/DOC(1995)3

    Document content and format guide for the International Criticality Safety Benchmark Evaluation Project (ICSBEP) – NEA/NSC/DOC(95)03

    Criticality safety NSC Nuclear science Criticality WPNCS ICSBEP Nuclear science …
    Published date: 24 March 2020
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