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    NEA Document
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    Nuclear science
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    Publications and Reports
    Benchmark Study on Pellet-Cladding Mechanical Interaction in Light Water Reactor Fuel Volume 2: Validation of Beginning-of-Life Power Ramping (Case 3)

    10.1787/05353d10-en

    Many of the failures that occur in nuclear fuel rods in light water reactors around the world are caused by the phenomenon of mechanical interaction between pellets and cladding (...

    English Nuclear science Light water reactors EGRFP WPRS Nuclear science Benchmark Reactor fuel performance …
    Published date: 12 June 2025
    Publications and Reports
    Benchmark Study on Pellet-Cladding Mechanical Interaction in Light Water Reactor Fuel: Volume 1. Hypothetical Beginning-of-Life Power Ramps (Cases 1 and 2)

    10.1787/80206f78-en

    Many of the failures that occur in nuclear fuel rods in light water reactors around the world are caused by the phenomenon of mechanical interaction between pellets and cladding (...

    English Nuclear science Light water reactors EGRFP WPRS Nuclear science Benchmark Reactor fuel performance …
    Published date: 12 June 2025
    Publications and Reports
    Specifications for the Generalised Nuclear Database Structure Version 2.0

    10.1787/5f05e3db-en

    Knowledge of basic nuclear physics data is essential for the modelling and safe operation of all types of nuclear facilities. The de facto international standard format, Evaluated...

    English WPEC Nuclear science Nuclear science Nuclear data processing …
    Published date: 12 June 2025
    NEA Document
    Benchmark on Dose Rate Calculations for Irradiated Assembly
    NEA/NSC/R(2023)8

    10.1787/3dbcca5e-en

    The Task Force on Dose Rate Calculations for Irradiated Fuel Assembly was launched in 2015 to assess code predictions of dose rates from bare spent fuel assemblies and to benchmar...

    WPFC Nuclear science Spent fuel Nuclear science Benchmark …
    Published date: 12 June 2025
    NEA Document
    Experimental Needs for Criticality Safety Purposes
    NEA/NSC/R(2022)6

    10.1787/e6fd68f4-en

    The goal of the Nuclear Energy Agency (NEA) Working Party on Nuclear Criticality Safety (WPNCS) Subgroup on Experimental Needs for Criticality Safety Purposes (SG-5) was to highli...

    Criticality safety Nuclear science Criticality WPNCS Experimental needs Nuclear science …
    Published date: 12 June 2025
    Publications and Reports
    Scientific Issues in Fuel Behaviour

    DOI: 10.1787/g2gh1c46-en

    ISBN-13: 9789264144200

    English Nuclear science Nuclear science
    Published date: 12 June 2025
    Publications and Reports
    International Code Comparison for Intermediate Energy Nuclear Data

    10.1787/g2gh1c3f-en

    English Nuclear science Nuclear science
    Published date: 5 June 2025
    NEA Working Paper
    Thermal-hydraulic Code Validation Benchmark Specifications for High -temperature Gas-cooled Reactors (HTGR) using High-temperature Test Facility (HTTF) data
    NEA/WKP(2024)3

    In 2022, the WPRS Expert Group on Thermal Hydraulics and Mechanics (EGTHM) mandated a new benchmark on high-temperature gas-cooled reactors (HTGR) using high-temperature test facility (HTTF) data an...

    CFD Nuclear science Thermal hydraulics WPRS Nuclear science Benchmark EGTHM …
    Published date: 28 April 2025
    Publications and Reports
    Unlocking the Hidden Value of Nuclear Fuel: The Societal Benefits of Diverse Material Recycling

    Once irradiated or “spent” nuclear fuel is unloaded from a reactor it is usually stored at the reactor site for between five and ten years. It is then ready for long-term storage or for reprocessing ...

    English WPFC Nuclear science Spent fuel Nuclear science Nuclear fuel cycle EGFRW …
    Published date: 24 January 2025
    Publications and Reports
    Criticality Calculations in Random Geometries

    Several applications of interest in nuclear criticality safety involve random media, which are media where the geometrical and/or material properties can only be described by assigning some probabili...

    English Nuclear science Criticality WPNCS Nuclear science …
    Published date: 24 January 2025
    NEA Working Paper
    Experimental Data Requirements for Fuel Performance Modelling
    NEA/WKP(2024)4

    Under the guidance of the Nuclear Energy Agency (NEA) Nuclear Science Committee (NSC), the Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS) studies the reactor ph...

    Nuclear fuel Fuel studies NSC Nuclear science EGRFP WPRS Nuclear science Reactor physics Reactor fuel performance …
    Published date: 12 December 2024
    NEA Document
    Proceedings of the 2017 International Workshop on Fuel Modelling to Support Safety and Performance Enhancement for Water-cooled Reactors
    NEA/CSNI/R(2021)11

    At the Nuclear Energy Agency (NEA), the importance of fuel modelling and its improvement through development of phenomenological representations has been recognised and multiple technical groups rela...

    Nuclear safety Nuclear safety research CSNI PRG CSNI Safety NSC Nuclear science Nuclear safety regulation WGFS …
    Published date: 22 October 2024
    NEA Working Paper
    Fluoride-salt High-temperature Reactor (FHR) Reactor Physics Calculations Benchmark
    NEA/WKP(2024)2

    Under the auspices of the Nuclear Energy Agency (NEA) Nuclear Science Committee (NSC), the Working Party on Scientific Issues of Reactor Systems (WPRS) has been established to study reactor physics, ...

    English Nuclear science EGRPANS WPRS Nuclear science Benchmark …
    Published date: 4 October 2024
    NEA Document
    Improvement of Integral Experiments Data for Minor Actinide Management Phase II
    NEA/NSC/R(2022)2

    Under the guidance of the NEA Nuclear Science Committee (NSC), the Expert Group on Improvement of Integral Experiments Data for Minor Actinide Management (EGIEMAM-II) was established to recommend nec...

    English Nuclear science Experiments Nuclear science Minor actinides …
    Published date: 4 March 2024
    Publications and Reports
    Handbook on Lead-bismuth Eutectic Alloy and Lead Properties, Materials Compatibility, Thermal-hydraulics and Technologies – 2015 Edition

    Heavy liquid metals such as lead or lead-bismuth have been proposed and investigated as coolants for fast reactors since the 1950s. More recently, there has been renewed interest worldwide in the use...

    English Nuclear fuel WPFC EGLM Fuel studies NSC Nuclear science EGCoCoT Nuclear science Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 26 January 2024
    NEA Working Paper
    Benchmark on Artificial Intelligence and Machine Learning for Scientific Computing in Nuclear Engineering. Phase 1: Critical Heat Flux Exercise Specifications
    NEA/WKP(2023)1

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

    Nuclear science Artificial Intelligence WPRS Multiphysics Thermal hydraulics and mechanics EGTHM Reactor physics Reactor fuel performance Multiphysics EGMUP Machine Learning Thermal hydraulics Nuclear science Benchmark …
    Published date: 18 January 2024
    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
    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
    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
    NEA Document
    Investigation of Covariance Data in General Purpose Nuclear Data Libraries
    NEA/NSC/R(2021)4

    The understanding of nuclear physics and the associated uncertainties is essential to the modelling of all nuclear systems. Nuclear reaction probabilities, emitted particle energies and angles, fissi...

    WPEC Nuclear science Nuclear data Nuclear science
    Published date: 8 February 2023
    NEA Document
    Role of Integral Experiment Covariance Data for Criticality Safety Validation: EG UACSA Benchmark Phase IV
    NEA/NSC/R(2021)1

    This benchmark report has been compiled under the guidance of the NEA Working Party on Nuclear Criticality Safety (WPNCS) in the Subgroup on the Role of Integral Experiment Uncertainties and Covarian...

    English UACSA Criticality safety Criticality WPNCS Nuclear science Benchmark …
    Published date: 30 January 2023
    NEA Document
    Burnup Credit Criticality Benchmark Phase IIID: Burnup Calculations of Gadolinium- Bearing Fuel Rods in Boiling Water Reactor Assemblies for Storage and Transportation
    NEA/NSC/R(2022)3/CORR

    Please note that this report was initially published in November 2022 (NEA/NSC/R(2022)3) under erroneous benchmark number IIB; in this updated version (NEA/NSC/R(2022)3/CORR) this has been corrected ...

    Criticality safety Nuclear science WPNCS Nuclear science Benchmark …
    Published date: 30 November 2022
    NEA Document
    Treatment of Volatile Fission Products
    NEA/NSC/R(2022)4

    Under the auspices of the NEA Nuclear Science Committee (NSC), the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC) was established to co-ordinate scientific activities related to ad...

    Fission products Spent fuel Nuclear science Nuclear fuel cycle EGFRW Fuel cycle physics and chemistry …
    Published date: 29 November 2022
    NEA Document
    Existing Practices for Multi-physics Validation: Report on Sub-Task 3, Task Force 2
    NEA/NSC/R(2019)7

    The modelling and simulation of nuclear systems allow scientists and engineers to probe aspects of the operation of these systems beyond what has been precisely measured. This has numerous applicatio...

    Reactor physics Nuclear science WPRS Multiphysics Nuclear science Benchmark Reactor physics Multiphysics EGMUP …
    Published date: 11 October 2022
    NEA Document
    Actinide and Fission Product Partitioning and Transmutation: Workshop Proceedings of the Fifteenth Exchange Meeting Manchester, United Kingdom, 30 September – 3 October 2018
    NEA/NSC/R(2020)4

    Advanced nuclear fuel cycles to improve the safety, sustainability and economics of nuclear energy are being investigated worldwide. Partitioning and transmutation (P&T) is one of the candidate techn...

    Nuclear science Fission products Actinides Nuclear science Nuclear fuel cycle …
    Published date: 11 October 2022
    NEA Document
    Subgroup 27: Prompt Photon Production from Fission Products
    NEA/NSC/R(2020)8

    The following report is issued by the WPEC Subgroup 27, which builds upon the work of the previous Subgroups 21 and 23, critically reviewing the gamma emission data and providing recommendations to i...

    WPEC Fission products Nuclear data Nuclear science
    Published date: 1 February 2022
    Publications and Reports
    The Strategic Plan of the Nuclear Energy Agency 2023-2028

    The OECD Nuclear Energy Agency (NEA) Strategic Plan serves as a guiding instrument that reflects the priorities of its member countries as the Agency addresses evolving needs in the exploration and a...

    English Nuclear law Human aspects of nuclear safety Nuclear law Radiological protection Nuclear science Nuclear safety Nuclear economics Nuclear technology Decommissioning and legacy management Nuclear decommissioning Radioactive waste management Nuclear safety research Safety Data Bank Nuclear science Nuclear safety regulation Nuclear economics …
    Published date: 25 January 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
    NEA Document
    NUPEC BWR Full-size Fine-mesh Bundle Test BFBT Benchmark - Volume IV: Results of Phase II on Pressure Drop and Critical Power
    NEA/NSC/R(2020)7

    In the past decade, a large amount of effort has been made towards the direct simulation of the boiling transition (BT) for boiling water reactor (BWR) fuel bundles. This international benchmark, bas...

    English Boiling water reactors Nuclear science Nuclear safety WPRS EGTHM Reactor physics Reactor physics Nuclear science Benchmark …
    Published date: 2 December 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
    NEA Document
    Benchmark Specifications for the Fluoride-salt High-temperature Reactor (FHR) Reactor Physics Calculations
    NEA/NSC/R(2020)5

    This benchmark focuses on FHR reactors with plates and triso fuel. Several phases are planned, starting with neutronics on a simple fuel element simulation without burn-up, and gradually extending to...

    Reactor physics Nuclear science EGPRS Verification WPRS Nuclear science Reactor physics …
    Published date: 4 June 2021
    NEA Document
    NUPEC BWR Full-size Fine-mesh Bundle Test BFBT Benchmark - Volume III: Results of Phase I on Void Distribution
    NEA/NSC/R(2020)6

    In the past decade, a large amount of effort has been made towards the direct simulation of the boiling transition (BT) for Boiling Water Reactor (BWR) fuel bundles. This international benchmark, bas...

    English Boiling water reactors Nuclear science Nuclear safety WPRS Thermal hydraulics and mechanics EGTHM Reactor physics Reactor physics Nuclear science Benchmark …
    Published date: 1 June 2021
    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
    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
    NEA Document
    Improving Nuclear Data Accuracy of the Am-241 Capture Cross-section
    NEA/NSC/R(2020)2

    The present report provides a summary of the experiments analysed and consensuses reached by NEA WPEC Subgroup 41, including final recommendations based on all experimental data available at the time...

    NSC Nuclear science Nuclear data Nuclear science
    Published date: 28 September 2020
    Publications and Reports
    2019 NEA Annual Report

    The NEA Annual Report 2019 provides an overview of the status of nuclear power in NEA member countries and illustrative descriptions of the Agency's activities and international joint projects. 2019 ...

    English Nuclear law Human aspects of nuclear safety Radiological protection Nuclear science Nuclear economics Nuclear technology Decommissioning and legacy management Radioactive waste management Nuclear safety research Nuclear science Nuclear safety regulation …
    Published date: 12 June 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
    NEA Document
    Proceedings of Increased Accident Tolerance of Fuels for Light Water Reactors (2013)
    NEA/NSC/DOC(2013)9

    Workshop Proceedings, 10-12 December 2012

    English Nuclear science EGATFL Nuclear science Proceedings Accident Tolerant Fuels Accident tolerant fuels …
    Published date: 25 February 2020
    NEA Document
    A Code to Code Benchmark for High-Temperature Gas-Cooled Reactor Fuel Element Depletion
    NEA/NSC/R(2019)1

    The high-temperature gas-cooled reactor (HTGR) is a Generation IV reactor concept that uses a graphitemoderated gas-cooled nuclear reactor with a once-through uranium fuel cycle. This design permits ...

    English Nuclear fuel Fuel studies Generation IV reactors Nuclear science WPRS Reactor physics Multiphysics EGMUP Reactor physics Cogeneration NSC Gas-cooled reactors EGPRS Nuclear science Benchmark …
    Published date: 18 January 2019
    NEA Document
    Review of Operating and Forthcoming Experimental Facilities Opened to International R&D Co-operation in the Field of Advanced Fuel Cycles
    NEA/NSC/R(2018)4
    English R&D WPFC NSC Chemistry Nuclear science Nuclear fuel cycle Fuel cycle physics and chemistry …
    Published date: 12 December 2018
    Publications and Reports
    State-of-the-Art Report on Light Water Reactor Accident-Tolerant Fuels

    As part of a broader spectrum of collaborative activities underpinning nuclear materials research, the Nuclear Energy Agency is supporting worldwide efforts towards the development of advanced materi...

    English Nuclear science Nuclear science Accident tolerant fuels
    Published date: 28 September 2018
    Publications and Reports
    NEA brochure

    The brochure provides background information about the NEA.

    English Nuclear law Human aspects of nuclear safety Nuclear law Radiological protection Nuclear science Nuclear economics Nuclear technology Regulation Decommissioning and legacy management Radioactive waste management Nuclear safety research Radiological protection Technology Safety research Radioactive waste management Human action Data Bank Nuclear science Nuclear safety regulation Nuclear economics …
    Published date: 10 September 2018
    NEA Document
    Benchmarking of Thermal-Hydraulic Loop Models for Lead-Alloy-Cooled Advanced Nuclear Energy Systems – Phase II: Natural Convection
    NEA/NSC/R(2018)1

    LACANES – Phase II: Natural Convection

    English WPFC NSC Nuclear science Nuclear science Benchmark Fuel cycle physics and chemistry …
    Published date: 4 April 2018
    Publications and Reports
    State-of-the-art Report on the Progress of Nuclear Fuel Cycle Chemistry

    The implementation of advanced nuclear systems requires that new technologies associated with the back end of the fuel cycle are developed. The separation of minor actinides from other fuel component...

    English Nuclear fuel WPFC Fuel studies Nuclear science Chemistry Liquid metal reactors NSC Nuclear science Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 19 March 2018
    NEA Document
    NEA Benchmark of the Modular High-Temperature Gas-Cooled Reactor 350 MW Core DesignVolumes I and II
    NEA/NSC/R(2017)4
    English Reactor physics NSC Nuclear science EGPRS WPRS Nuclear science EGTHM Reactor physics EGMUP …
    Published date: 6 December 2017
    Publications and Reports
    The Strategic Plan of the Nuclear Energy Agency 2017-2022

    This Strategic Plan is intended to guide the NEA as it seeks to meet the evolving needs of member countries in the application and exploration of nuclear science and technology. The plan includes an ...

    English Nuclear law Human aspects of nuclear safety Nuclear law Radiological protection Decommissioning Nuclear science Nuclear economics Nuclear technology Decommissioning and legacy management Nuclear decommissioning Stakeholder Radioactive waste management Nuclear safety research Safety Safety culture Safety research Decontamination Data Bank Nuclear science Nuclear safety regulation Nuclear economics …
    Published date: 22 December 2016
    NEA Document
    Intermediate Report on Methods and Approaches to Provide Feedback from Nuclear and Covariance Data Adjustment for Improvement of Nuclear Data Files
    NEA/NSC/R(2016)6
    English WPEC NSC Nuclear science Nuclear data Nuclear science …
    Published date: 2 December 2016
    NEA Document
    The Effects of the Uncertainty of Input Parameters on Nuclear Fuel Cycle Scenario Studies
    NEA/NSC/R(2016)4
    English Nuclear fuel WPFC Fuel studies NSC Nuclear science Nuclear science EGAFCS Partitioning and transmutation Fuel cycle physics and chemistry …
    Published date: 10 November 2016
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