European Sustainable Nuclear Industrial Initiative



ESNII+ Events

European Industrial Initiatives (EIIs) constitute key elements of Europe's SET-Plan. They are industry-led programmes with the aim to boost research and innovation and to accelerate deployment of the technologies.

SNETP has set up a Task Force comprising research organisations and industrial partners to develop the European Sustainable Nuclear Industrial Initiative (ESNII) in support of the SET-Plan.

ESNII addresses the need for demonstration of Gen-IV Fast Neutron Reactor technologies, together with the supporting research infrastructures, fuel facilities and R&D work. As indicated in its Strategic Research & Innovation Agenda, SNETP has prioritised the different Gen-IV systems and is proposing to develop the following projects:
  • The sodium-cooled fast neutron reactor technology (the ASTRID project) as the reference solution, with the construction of a prototype around 2020 in France, which is strongly supporting this technology
  • As a first alternative technology, the lead-cooled fast reactor (ALFRED) with the construction of an experimental reactor to demonstrate the technology, in another European country willing to host this programme, and supported by a lead-bismuth irradiation facility project in Belgium (MYRRHA)
  • As a second alternative technology, the gas-cooled fast reactor (ALLEGRO), also requiring the construction of technology demonstrator in a European country.
ESNII was formally launched at the SET-Plan Conference in Brussels on 15 November 2010.

More information

To coordinate the implementation of ESNII, a Task Force was set up under the auspices of the Sustainable Nuclear Energy Technology Platform (SNETP). The Task Force brings together technology developers, utilities, engineering companies and research institutions, and represents all members.

The missions of the ESNII Task Force are:
  • To elaborate and consolidate the ESNII roadmap (demonstrators, prototypes, main research and testing facilities), in terms of design, planning, budget, legal issues, intellectual property.
  • To support the preparation of consortia and/or any kind of collaborative agreement involving public and private partners for the implementation of the infrastructures, facilities or programmes necessary to develop the technologies up to the industrial phase, taking into account the expected times to market.
  • To collect relevant information of possible interest from international initiatives or the SET-Plan.
  • To provide any relevant information, proposal or assessment on any important issue for the progress of ESNII to the Steering Group of the SET-Plan.
Noel Camarcat, Special Advisor on nuclear R&D and international issues at EDF, is the Chairman of ESNII. Prof. Dr. Peter Baeten, Director of Advanced Nuclear Systems at the Belgian SCK-CEN, is the Vice-Chairman.

Additionally, an ESNII Executive Board was constituted with the leaders of the ESNII projects, for operational management of the initiative.

The ESNII Task Force is open to SNETP members only. Candidates must complete the applicaiton form and send it by email to the SNETP Secretariat (no signature is required).

The current ESNII members are presented below.

Interested in joining ESNII? Download the application form here


AMEC is a leading engineering, project management, and consultancy company and, through its acquisition of NNC in 2005, has many years’ experience in the nuclear fission and fusion fields. It is a world leader in fast reactor technology resulting from many years’ experience in the design, construction, and development of the UK liquid metal fast reactors DFR, PFR and the design of CDFR.


Group Ansaldo Nucleare has the complete responsibility for the nuclear business and has a sound presence in the new international markets. In Italy, Ansaldo Nucleare is recognised as the main company in the nuclear sector. The company’s specific missions are: Supply of new Nuclear Power Plants (NPPs); Service to operating nuclear plants; Decommissioning of nuclear plants and radioactive waste management.


AREVA supplies solutions for power generation with less carbon. AREVA’s unique integrated offering to utilities covers every stage of the fuel cycle, nuclear reactor design and construction, and related services. The group is also expanding its operations to renewable energies. AREVA has a continuous involvement in the development of new reactor concepts especially in compliance with the GEN IV objectives. Advanced studies and designs have been performed, dedicated to HTR and VHTR concepts, fusion and accelerator driven system facilities. In particular, AREVA has a long experience in the design and construction of Sodium Fast Reactors and is deeply involved in the conceptual design of the ASTRID SFR new demonstrator nuclear island, in close collaboration with CEA and the other partners of the project.


The CEA is the French Alternative Energies and Atomic Energy Commission (Commissariat à l'énergie atomique et aux énergies alternatives). It is a public body established in October 1945 by General de Gaulle. A leader in research, development and innovation, the CEA mission statement has two main objectives: To become the leading technological research organization in Europe and to ensure that the nuclear deterrent remains effective in the future.


CEZ Group is an established, integrated electricity conglomerate with operations in a number of countries in Central and Southeastern Europe and Turkey, headquartered in the Czech Republic. Its principal businesses encompass generation, trading, and distribution of power and heat, as well as coal mining.


The CIEMAT, an Organism of the Ministry of Economy and Competitiveness, is a Public Research Agency for excellence in energy and environment, as well as in many vanguard technologies and in various areas of fundamental research.


The Consorzio Interuniversitario per la Ricerca TEcnologica Nucleare CIRTEN was constituted in 1994 by the Polytechnics of Milano and Torino and the Universities of Padova, Palermo, Pisa and Roma with the purpose of promoting the scientific and technological research and coordinate the Universities participation to the knowledge development and collaboration with national and international Research Institutions and Industries in the study and practical solution of problems characterizing technological sectors like energy production, nuclear energy power and fuel cycle plants, industrial/sanitary applications of nuclear radiations, safety, physical and environmental protection problems.


The GeNERG (Genoa Nuclear Energy Research Group) of the DIME/TEC Section deals with issues related to the design and neutronic (by MC-based static and dynamic codes, e.g. MCNP6, Serpent) and fluid-dynamic (by CFD codes, e.g. OpenFOAM, Fluent, STAR-CCM+, etc.) analyses of nuclear reactors. Within neutronics, static and dynamic analyses of core and related fuel cycles are the focus of the research activities of GeNERG. Within CFD, the activity is mainly (but not exclusively) focused on the study of thermal-fluid-dynamics liquid lead used as a coolant in the GEN-IV LFR; a particular attention is devoted to the design and optimisation of the steam generators and the primary pumps. In the frame of this research theme GeNERG has actively collaborated with several Italian and European partners (INFN, Ansaldo Nucleare, SCK•CEN, RC-Rez, etc.), even in the context of international/European collaborative projects.


Empresarios Agrupados (EA) is a leading architect-engineering organisation in Spain with significant international experience, providing a complete range of consulting, project management, engineering and design, procurement, construction management, plant testing, safety assessment, quality assurance, as well as plant operation and maintenance support services to the electric utility industry.


As the Commission's in-house science service, the Joint Research Centre's mission is to provide EU policies with independent, evidence-based scientific and technical support throughout the whole policy cycle.


EDF is one of the most important electricity producer in the world. 86% of its production comes from nuclear power plants, with 58 reactors (PWRs) in operation at the present time. A tremendous experience is available on sodium cooled technology through the EDF responsibilities for the Phenix and Superphenix plants. For the Na fast reactors, EDF Research and Development Division is skilled in the areas of nuclear power generation systems and fuel cycle and is in charge of neutronic calculation schemes and innovative nuclear concepts investigation especially in order to assess the safety of the reactors .


ENEA is a public research institution operating in the fields of energy, environment and new technologies to support competitiveness and sustainable development. ENEA conducts scientific research and technology development activities that draw on a wide range of expertise, advanced facilities and tools located at its own eleven Research Centres, operating in support of ENEA programmes and the Nation productive system.


ENGIE is a global energy player and an expert operator in the three key sectors of electricity, natural gas and energy services. The Group puts responsible growth at the heart of all its businesses in order to rise successfully to today’s major energy and environmental challenges: responding to the demand for energy, ensuring security of supply, combating climate change and making optimum use of resources.


Karlsruhe Institute of Technology (KIT) is a higher education and research organisation KIT was established on 01/10/2009 as merger of Universität Karlsruhe, one of Germany’s leading research universities, and Forschungszentrum Karlsruhe, one of the largest research centres in the Helmholtz Association. Higher education, research, and innovation are the three pillars of KIT’s activities. The Programme Nuclear Safety Research (NUKLEAR) within KIT is recognized as a long-term, provident research activity, studying scientific aspects of reactor safety and the safety of nuclear waste disposal.


MTA EK is mainly active in the field of basic and applied research related to nuclear energy. The activities of the institute started in the 1950’s. The main research areas of MTA EK are reactor physics, thermal hydraulics, fuel behaviour studies, and material sciences, related aspects of informatics (simulators, core monitoring, etc.), health physics, environmental investigations, nuclear electronics and chemistry.


National Centre for Nuclear Research (NCBJ) with approximately 1,000 employees is one of the largest research institutes in Poland. The Institute started operations on September 1, 2011 in result of merging POLATOM Institute for Atomic Energy (IEA) and A. Sołtan Institute for Nuclear Studies (IPJ). The Centre’s strategic tasks include: (i) to support Polish nuclear power programme; (ii) to conduct basic research in physics in collaboration with world leading laboratories; (iii) to construct high-tech devices (mainly accelerators and detectors) for research, industry and medicine.


NNL provides research, development, technology and scientific services for a wide range of disciplines across all areas of the nuclear fuel cycle including strategic assessment, fuel production, reactor operations support, waste management and decommissioning. NNL is government owned, commercially operated (GOCO) organisation that provides independent, authoritative advice on nuclear issues to the UK government.growth opportunities based around providing quality value and service for customers and applying the best innovation and safety.


NRG is the nuclear centre of competence in the Netherlands. NRG develops knowledge, processes and products for safe applications of nuclear technology in energy, environment and health. This includes products, services and technologies for safe and economic operation of existing nuclear power plants and future sustainable nuclear energy systems.


IBERDROLA is Spanish public multinational electric utility company. Iberdrola’s business combines power generation, and gas and electricity supply. It manages its production assets, comprising hydroelectric, combined-cycle gas, nuclear and co-generation plants located in 40 countries, mainly in Europe, North America and Latin America.


The Institute for Nuclear Research Pitesti (ICN) has as main activity objective the scientific research, the fundamental and applied technological development, the exploitation of its own research through technology transfer, design, investments, consultancy, expertise and technical specialized assistance, subordinated to ensuring the scientific and technical support for Romania's nuclear energy sector.


The Belgian Nuclear Research Centre (SCK•CEN) is a Foundation of Public Utility (FPU), with a legal status according to private law, under the tutorial of the Belgian Federal Minister in charge of energy. SCK•CEN has about 650 employees, of which one third has an academic degree. SCK•CENs main competences are found in nuclear materials research, development of innovative nuclear systems, nuclear waste research and environmental and health research in connection with nuclear radiation.


Tecnatom is an engineering company that has provided services to the nuclear industry since its creation in 1957. The company’s main activity centers on the rendering of inspection and component structural integrity services, the training of operations personnel by means of full-scope simulators and engineering in support of plant operation.


ÚJV Řež a.s., founded in 1955, is a scientific & research engineering company focused on the usage of nuclear technology. The Institute mainly concentrates its activities on R&D and designing services for operators and suppliers of power installations. ÚJV has experience mainly in NPP safety & lifetime management (mainly for VVERs), radiolysis & water chemistry effects in NPPs, nuclear medicine, and also in fuel reprocessing. Its former experience covers also heavy-watermoderated gas-cooled reactors and liquid metal fast breeder reactors.


The Technical University of Valencia (is a Spanish university located in Valencia, with a focus on science and technology. The university has a large experience in contracts and projects inside the Nuclear Field.


VUJE, a.s. is an engineering company that performs design, supply, implementation, research and training activities, particularly in the field of nuclear and conventional power generation. The VUJE, a.s. provides research and development background for safe, reliable and economical operation of nuclear facilities. It executes scientific management of nuclear power plant commissioning.


VTT Technical Research Centre of Finland Ltd is the leading research and technology company in the Nordic countries. VTT has a national mandate in Finland. They use their research and knowledge to provide expert services for domestic and international customers and partners, serving both private and public sectors.



The European Sustainable Nuclear Industrial Initiative (ESNII) addresses the need for demonstration of Generation IV Fast Neutron Reactor technologies, together with supporting research infrastructures, fuel facilities and R&D work. The main goal of ESNII is to design, license, construct, commission and put into operation before 2025 the Sodium Fast Reactor (SFR) Prototype reactor called ASTRID and the flexible fast spectrum irradiation facility MYRRHA. The ALFRED demonstrator for Lead-cooled Fast Reactor (LFR), and ALLEGRO for Gas-cooled Fast Reactor (GFR) technologies are also part of the roadmap.

ADRIANA (ADvanced Reactor Initiative And Network Arrangement) is a rolex replica coordination action supported by the Euratom 7th Framework Programme, dedicated to the mapping and gap analysis of research infrastructures in support of the European Sustainable Nuclear Industrial rolex brevet replica Initiative: "ESNII" established under the umbrella of the Sustainable Nuclear Energy Technology Platform (SNETP).


The Specific Support Action (SSA) named "Roadmap for a European Innovative SOdium cooled FAst Reactor – EISOFAR" aimed at enabling European stakeholders to define their specific R&D strategic objectives for a fourth generation European Sodium-cooled Fast Reactor (ESFR).The large integrated Collaborative Project on European Sodium Fast Reactor (CP-ESFR) logically followed this action by further identifying, organising and implementing a significant part of the needed R&D effort.

The LEADER project dealt with the development of a scaled demonstrator of the LFR technology to a conceptual level of a Lead Fast Reactor Industrial size plant. The proposal was based on previous achievements obtained in the ELSY project under the 6th FP of the EU. It also took into account the indications emerged from the European Strategic Research Agenda as well as the main goals of the European Industrial Initiative on Fission.

Central Design Team (CDT) for a Fast-spectrum Transmutation Experimental Facility was a European Atomic Energy community (EURATOM) Seventh Framework Programme (FP7) project aiming to design a fast spectrum transmutation facility (FASTEF) able to demonstrate efficient transmutation and associated technology through a system working in subcritical mode, namely the accelerator driven system (ADS), and/or critical mode.

GOFASTR on Cordis
The GOFASTR project concentrated on the GFR option with a view to developing the GFR as a more sustainable version of the very high-temperature reactor (VHTR), also one of the six Gen IV systems. The design goals for GFR are ambitious, aiming for a core outlet temperature of around 850 degrees Celsius, a compact core with a power density of about 100 MWth / m3, a low enough plutonium (Pu) inventory to allow wide deployment, a self-sustaining core in terms of Pu consumption and a proliferation resistant core that does not use specific Pu breeding elements.
About ESNII Plus

ESNII Plus is a preparatory phase project that supports the implementation of ESNII, one of the three pillars of the SNETP. It carries out coordinated activities to consolidate organisational aspects, research, development and demonstration initiatives on advanced fission reactor safety at European level. This will prepare ESNII for the challenges that lie ahead in the 2014-2020 agenda.

These coordinated activities should foster pan-European joint programming activities and their implementation: organisational, financial, roadmapping, capacity building and associated industrial planning activities are a relevant part of the project. Additional cross-cutting joint research activities in a range of safety topics are nevertheless at the core of the project and include: core and fuel safety, seismic studies, and instrumentation for safety, industrial perspectives and support to the development of facilities.

The project also contributes to the development of a large and effective network with the dissemination of research results on Fast Neutron Reactors thanks to a significant Education and Training work package, the identification of needs and the drafting of a strategic plan for the 2014-2020 period and beyond.

Participation of the key ESNII players in this project ensures the strategic alignment between stakeholders to foster joint roadmapping of activities and bring together research communities. ESNII Plus promotes better coordination between national programmes and promotes the sharing of knowledge within the ESNII community. The project will identify common industrial and market perspectives for ESNII projects and ESNII Plus will contribute to building a long-term common vision that can ease fast reactor deployment. Finally, the project will develop an ESNII label and promote nuclear safety culture at EU level towards a wide audience, also through its education and training activities.

The project involves private and public stakeholders, including industry, research and academic communities, with opened door to international collaboration. The European research institutes, utilities, universities, TSO and reactor industrial providers participating to the project are listed below:

CEA (France), AMEC (United Kingdom), ANSALDO (Italy), AREVA NP (France), CIEMAT (Spain), CIRTEN (Italy), EDF (France), EA (Spain), ENEA (Italy), GRS (Germany), HZDR (Germany), ICN (Romania), JRC - ITU (Europe), KIT (Germany), KTH (Sweden), LGI (France), MTA EK (Hungary), NCBJ (Poland), NNL (United Kingdom), NRG (The Netherlands), NUMERIA (Italy), NUVIA (France), PSI (Switzerland), RSE (Italy), SCK CEN (Belgium), SINTEC (Italy), TE (Belgium), TU Delft (The Netherlands), UJV (Czech Republic), UPM (Spain), UPV (Spain), VUJE (Slovakia), IPUL (Latvia), Chalmers (Sweden), Uni-Rm (Italy)

ESNII + Work Packages, objectives and outcomes

WP1 - Structuring ESNII for HORIZON 2020
  • Development of ESNII strategic orientations for the 2014-2020 period
  • Definition of the most appropriate legal status and financial instruments for ESNII
  • Adaptation of ESNII governance and management procedures
  • Elaboration of a Business plan for ESNII
WP2 – Strategic Roadmapping
  • Realisation of roadmapping activities to deliver an updated ESNII Concept Paper and ESNII implementation Plan
  • Identification of Joint Programmes
WP3 - Support to facilities development
  • Identification of functional specifications of R&D facilities
  • Development of a roadmap for the qualification and testing infrastructure for irradiation programmes
  • Development of a synthesis report covering siting and licensing requirements for demonstrators
WP4 - Industrial perspectives
  • Support European industrial strategies through a comprehensive evaluation of the energy market needs in the medium and long term and of the possible solutions offered by the advanced technologies currently proposed
WP5 – Training and Dissemination
  • Develop educational tools and learning methodologies to support the improvement of Fast Neutron Reactors (FNR) systems
  • Demonstrate the capability of the FNR community to share the knowledge existing or to be developed within the frame of ESNII+, between confirmed researchers and students, and between representatives of the three options selected by SNETP ie SFR, LFR and GFR
  • Improve and structure the communication for ESNII, internally and towards the international partners or organizations ie OECD, IAEA…
  • Enhance internal and external collaborations
WP6 – Core Safety
  • Perform calculations for the ESNII reactor cores using different state-of-the-art codes and data libraries to identify the gaps in current methods and tools used for the fast reactor core safety analysis
  • Identification (based on the results stemming from the core safety analyses) of the experimental and theoretical R&D activities that would allow to improve the present design, as well as existing methods, tools and databases for static and transient analysis, of the ESNII reactor cores (ASTRID, ALLEGRO and ALFRED)
WP7 – Fuel Safety
  • Provide a set of oxide fuel properties that can reduce uncertainties in safety behaviour evaluations, in nominal conditions as well as during transients
WP8 - Seismic Studies
  • Support the implementation of SNETP’s SRIA and of the ESNII Deployment Strategy in the field of safety, covering priority activities related to the system protection from external events, through the review of the safety aspects of the reactors identified in the ESNII deployment strategy with respect to earthquake effects
WP9 - Instrumentation for safety
  • Support the implementation of SNETP’s SRIA and the ESNII Deployment Strategy in the field of ‘instrumentation for safety’
ESNII Plus information
  • Project title: Preparing ESNII for HORIZON 2020
  • Project Acronym: ESNII Plus
  • Starting date: 01/09/2013
  • Duration in months: 48
  • Call (part) identifier: FP7-Fission-2013
  • Project number: 605172
  • Project coordinator: Alfredo Vasile, CEA (Commissariat à l’Energie Atomique et aux Energies Alternatives) - alfredo.vasile @
Access ESNII Plus members area here >
Generation 4 Nuclear reactor systems for the future
Date: 19-23 June 2017
Location: INSTN/CEA-Saclay, France
The general objective of this event is to provide participants with an up-to-date, basic knowledge of the six concepts selected for the 4th generation of nuclear systems (SFR, LFR, GFR, VHTR, SCWR, MSR).
More information >

Generation 4 Nuclear reactor systems for the future
Date: 10-14 October 2016
Location: INSTN/CEA/Saclay, France
The general objective is to provide participants with an up-to-date, basic knowledge on the six concepts selected for the 4th generation of nuclear systems (SFR, LFR, GFR, VHTR, SCWR, MSR). The trainees will be able to:
- Describe the main characteristics of each concept, and formulate their design, performance and safety aspects
- Discuss the technical challenges they are faced with for future development.
More information >

European workshop on Coolant Quality Control, Physico-Chemistry & Dosimetry in Fast Reactors
Date: 5-7 October 2016
Location: ÚJV Řež, a. s, Czech Republic
The Workshop is dedicated to topics covering coolant chemistry & purification methods, transport & removal of activity and management of effluents in the 4th Generation ESNII fast reactor demonstrators cooled with liquid metals (sodium, lead, lead-bismuth) and helium.
Announcement >
Programme >
Registration >

ESNII+ Summer School
Date: 9-11 May 2016
Location: University of Pisa, Italy
CIRTEN is organising the 2nd ESNII+ Summer School at the School of Engineering of the University of Pisa on “The challenges of the future Gen IV Reactors: safety issues in support to the design and operation."
More information & registration here >

ESNII+ Thermophysical Properties of Mixed oxide Fuels for Fast Reactors Workshop
Date: 17-18 December 2015
Location: Aix en Provence (France)
The workshop will cover all the oxide fuel properties involved in designing and licensing process of Generation IV (GenIV) demonstrators and will provide a platform for discussions and exchange ideas between students, young professionals and experts on mixed oxide fuel (U, Pu)O2 in fast reactor conditions.
More information & details here >

ESNII+ Workshop on Sitting and Licensing of Fast Neutron Reactors
Date: 18-20 November 2015
Location: Mioveni (Romania)
This workshop will cover all aspects involved in sitting and licensing process of Generation IV (GenIV) demonstrators and will provide a platform for discussions and for exchanging ideas between students, young professionals and specialists on sitting, safety and licensing issues.
More information & details here >

ESNII+ Workshop on Joint Programming 22-23 October 2015
The first ESNII+ Workshop on Joint Programming (workpackage 2) took place on 22 and 23 October 2015 in Brussels. It aimed at helping to work towards an overall strategic roadmapping for ESNII that will embed the possibility of joint programming. Joint programming between national actors, Member States and the EU will provide a sound basis for longer term and larger collaboration between the different actors by pulling together part of their resources to realise a common programme.
Presentations are available on the private ESNII+ workspace here >

ESNII Publications

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