European Database for Multiscale Modelling of Radiation Damage

Informations projet

ENTENTE

N° de convention de subvention: 900018

DOI

10.3030/900018

Projet clôturé

Date de signature de la CE 18 Mai 2020

Date de début 1 Septembre 2020

Date de fin 31 Août 2024

Financé au titre de

• Euratom

Coût total

€ 4 938 147,94

Contribution de l’UE

€ 4 000 000,00

Coordonné par

CENTRO DE INVESTIGACIONES ENERGETICAS MEDIOAMBIENTALES Y TECNOLOGICAS
Spain

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Livrables

Documents, reports (36)

Data interoperability: extraction of microstructural data from electron microscopy data

The automated post-processing of microstructural experimental data will be described, including the last version of CLOCK toolkit. Particular tests will be run on the ENTENTE database.

Specification of ENTENTE database

Identify user cases of the database for validation of modelling tools or data extraction and explore technical specifications of the database

Machine learning (ML) as regression tool, ML in microstructure descriptors and damage identification, and development of ML algorithms for accelerated LTO estimation

The favoured choice of machine learning approaches is delivered to be most feasible for data mining (regressional toolset) and validity/error screening. In addition, selected ML routines will be tested in their ability to predict meaningful factors affecting microstructure and its evolution, hardening and embrittlement by neuron irradiation of nuclear vessel steels. Furthermore, tailored algorithms will be produced to serve various data treatment and predictive purposes that envelope RPV embrittlement and aging. Machine vision/learning toolset is functional to automatically operate and store data from microstructural images. Easy-to-use software packages are prepared and demonstrated in the ICME workflow.

Hybrid hardening models from SANS and NI experiments

Description of SANS and Nanoindentation informed hardening models

Status on data collection and provision: lessons learnt

The deliverable will detail the status of the data stewardship and quality plan, identify gaps in the database that needs to be filled.

Integrated Computational Materials Engineering of RPV workflow for RPV steel and an assessment of LTO

ICME workflow and thus Process–Structure–Property– Performance (PSPP) causalities will be established linking multiple simulation and experimental scales. The effect of embrittlement/aging (performance) is assessed in relation to LTO making use of other WP3 and WP4 tasks; the bridging of different scales and methods for accelerated analysis routine.

Irradiation spectra uncertainty impact on mechanical properties of irradiated steel

The deliverable consists of establishing links between irradiation characteristics, radiation damage and local mechanical properties in RPV microstructures using the database in WP2, comparing with experimental data in WP3, and feeding the data to the simulation models in WP4. Identification and sensitivity analysis of embrittling factors and defining damage descriptors will be performed.

Metadata and data format: Microstructure and models

Detail the last data and metadata format for microstructural examination and models, namely definition of raw data, survey of the available data formats, required richness of the metadata to ensure proper application of the quality plan, and the final choice of data format to be used in the ENTENTE database

New hybrid models to describe kinetics in RPV embrittlement

Application of hybrid OKMC and AKMC methods to describe kinetics of the processes leading to solute segregation up to space and time scales that are comparable with those reached in experiments on RPV steels

Mid-term Workshop

Outputs of the mid-term workshop sessions (task 5.2)

Prediction of grain boundary coverage and its effect on surface energy parameter

This deliverable will present the first measurement results of radiation-induced grain boundary segregation (obtained experimentally in ENTENTE and collated elsewhere). The effect of these evolutions on the surface energy parameter γf are initially evaluated by means of adapted modelling techniques.

Definition of process flow for definition of data format and quality plan

Describe the general plan for defining raw data data and metadata format and relevant quality plan

1st plenary meeting minutes

Minutes, main actions and presentation of 1st plenary meeting

Publication rules

Publication rules to assure open access publication

Statistical analysis of stress-strain states in RPV polycrystals affecting brittle fracture by crystal plasticity simulations and validation experiments

The report will describe the experimental and modelling data acquisition combined with data analysis, including acquisition of a large experimental dataset of local strains (DIC) superimposed with crystalline orientations (EBSD); acquisition of a large numerical dataset of 3D stress and strains fields resulting from large scale simulations of 3D polycrystalline aggregates with a free surface as in experiment (AMITEX_FFTP code); development of a 2D statistical analysis of surface strain fields, and their correlations with the field of crystalline orientation, in order to compare experiment and simulation

NUGENIA and Stakeholders feedback

The feedback of the exploitation team as well as NUGENIA feedback regarding the applicability and benefits of the ENTENTE database and SOTERIA platform for the end users and in particular utilities will be reported. The feedback from the exploitation team meetings and the mid-term workshop is considered as well, including recommendations for taking any corrective actions if needed. The terms of reference defining the purpose and structures of the exploitation team and related meetings will be considered adequately.

Dose-dependent constitutive models for mechanical and damage response prediction in RPV steel

Will include dose-dependent constitutive stress-strain rule developed, tested and contribute to the development of predictive fracture models.

ENTENTE training activities report

Summary of education and training activities (task 5.2)

Non-hardening embrittlement of RPV steels

Final report, including modelling and measurement data not yet obtained or presented at the time of the first report delivery.

Metadata and data format: Mechanical properties

Detail the first data and metadata format for mechanical testing namely definition of raw data survey of the available data formats required richness of the metadata to ensure proper application of the quality plan and the final choice of data format to be used in the ENTENTE database

Interoperability of SOTERIA platform with ENTENTE database

The interoperability between ENTENTE database and SOTERIA platform will be defined including how experimental data and metadata can be extracted from ENTENTE database and post processed in SOTERIA Platform in order to correctly parameterize modelling tools

Common session with EU-funded projects feedback

Compile the results of the common session with other coordinators and NUGENIA and EERA JPNM representatives. This session will be organized at the Mid-term project workshop.

Project Quality plan

Procedures for assessing the quality of project deliverables and document management strategy

Kick-off meeting minutes

Minutes main actions and presentation of the project kickoff meeting

Final plenary meeting minutes

Minutes, main actions and presentation of 3rd plenary meeting

Non-hardening embrittlement brittle fracture modelling

This deliverable will present how the dose-dependent evolutions of the surface energy parameter γf due to segregations are modelled and introduced in predictive fracture toughness models

2st plenary meeting minutes

Minutes, main actions and presentation of 2nd plenary meeting

Influence of chemical and structural heterogeneities on the irradiation behaviour

The deliverable summarizes accumulated evidence on chemical heterogeneities of the investigated RPV steels and their effects on the irradiated microstructures in terms of number density, size and composition of irradiation-induced nano-features as well as segregation to extended defects. Equivalent results on model alloys with intentionally varied alloy composition are included as a reference framework.

Project management plan

Information about the management structures and procedures

Supply of unirradiated and irradiated material for microstructural examination

The report will list the various specimens sent and material characteristics

Microstructural evolution and flux effect in neutron irradiated RPV steels

APT and PAS characterisation results on the microstructural evolution, solute segregation/clustering, and the effects of flux is reported on selected material(s), such as RPV weld-steel. Atomistic simulations provide results and methodology to enhance the reliability of PAS measurements. Datasets are provided for simulation use in WP3 and WP4

Final Workshop

Outputs of the Final workshop (task 5.2)

Plan for the Exploitation and Dissemination of Results (PEDR)

It is a document which summarises the beneficiaries strategy and concrete actions related to the protection dissemination and exploitation of the project results It will include a definition of the reference cases

Quality plan and its application to the data

The deliverable will detail quality plan and its application to data generated in previous projects or within WP3.

Characterisation of unirradiated microstructures and test matrix for irradiated materials

The deliverable reports the unirradiated microstructures of the RPV steels investigated in Task 32 taking into account the requirements of the new data base link with WP2 The test matrix of ion and neutronirradiated RPV steels and model alloys included in Task 32 is specified

Prediction of dose-dependent fracture response evolutions

Fracture models at different scales for neutron irradiated materials and correspondent experiments will be compiled.

Open Research Data Pilot (2)

Data management plan (DMP)

he DMP will describe the data management life cycle for the data collected processed andor generated by ENTENTE including information on the handling of research data during after the end of the project what data will be collected processed andor generated which methodology standards will be applied whether data will be sharedmade open access and how data will be curated preserved including after the end of the project

Communication plan

lan for communication and dissemination actions of the ENTENTE consortium

Publications

Peer reviewed articles (3)

Post-irradiation annealing of high flux irradiated and surveillance material reactor pressure vessel weld metal

Auteurs: Kristina Lindgren, Magnus Boåsen, Zaiqing Que, Krystyna Stiller, Pål Efsing, Mattias Thuvander
Publié dans: Journal of Nuclear Materials, Numéro 562, 2022, ISSN 0022-3115
Éditeur: Elsevier BV
DOI: 10.1016/j.jnucmat.2022.153586

Prediction of the Transition-Temperature Shift Using Machine Learning Algorithms and the Plotter Database

Auteurs: Ferreño, Diego, Marta Serrano, Mark Kirk, and José A. Sainz-Aja
Publié dans: Metals, Numéro 12, 2020, ISSN 2075-4701
Éditeur: MDPI
DOI: 10.3390/met12020186

Micromorphic crystal plasticity approach to damage regularization and size effects in martensitic steels

Auteurs: Lindroos, Matti; Scherer, Jean-Michel; Forest, Samuel; Laukkanen, Anssi; Andersson, Tom; Vaara, Joona; Mäntylä, Antti; Frondelius, Tero
Publié dans: International Journal of Plasticity, Numéro 151, 2022, ISSN 0749-6419
Éditeur: Pergamon Press Ltd.
DOI: 10.1016/j.ijplas.2021.103187