The mastery of energy has enabled the advent of every major technological advance: from industrialization to the transport revolution, to the improvement of living conditions… Our ability to produce and use it has been decisive for our humanity. Today, the focus is on efficiency, decarbonized energy, sobriety and balance in the energy mix. Our founders worked in nuclear research before joining forces to create DAES. They have taken part in major international projects at major institutes with which we continue to collaborate through engineering studies or programs such as CERN K
On a daily basis, DAES teams contribute to the definition of advanced engineering solutions through the simulation of equipment and components: targets, cyclotrons, pumps, supports, lifting equipment, seals, etc. In close collaboration with customer and end-customer project teams, we take charge of model definition, studies, iterations for optimization, scenario analysis and the development of specific tools or methods that can be used for future evolutions. Our teams are involved in the study of all physical / multiphysical phenomena: mechanics, fluidics, thermics, optics, electromagnetism, dynamics, seismics…
The civil nuclear industry remains a major source of electricity in the European Union (about 23% of total generation in 2024 according to Eurostat, with an installed capacity of nearly 100 GW).
In Switzerland, nuclear accounts for about 28% of electricity generation in 2024 according to the Swiss Federal Office of Energy, with an installed capacity of nearly 3 GW, compared with about 60% for hydropower, 7% for solar and 4% for thermal. In France, it represents about 68% of total generation in 2025 according to RTE, with an installed capacity of more than 60 GW, compared with about 11% for hydropower. Its low greenhouse gas emissions (such as CO2) are currently one of its main advantages over fossil fuels.
Normative mechanical calculation
The question of civil nuclear power, in particular the safety and security of nuclear power plants and the management and storage of nuclear waste resulting from uranium fission, is always at the heart of debates. The industry, via theAFCEN among others, publishes very strict construction and calculation codes such as :
- RCC-M – Rules for the design and construction of mechanical equipment for PWR (Pressurized Water Reactor) nuclear reactors,
- RCC-MRx – Rules for the design and construction of mechanical equipment for high-temperature, experimental and fusion nuclear facilities.
- Other equivalent rules, such as ASME III, published and adopted in the USA and many other countries
The use of these codes (known as “dimensioning codes”) facilitates the chain from design to commissioning and operation of mechanical systems (but also civil engineering or control and energy systems) that links designers, architects, manufacturers and operators of such systems, as well as the acceptance of justification dossiers with the safety authorities that authorize such installations (nuclear safety authority, etc.). ASN -for France- or the Federal Nuclear Safety Inspectorate IFSN -for Switzerland).
Pascal SABBAGH, co-founder of DAES, is one of the experts invited to join the RCC-MRx working group, whose aim is to enrich and improve existing rules.
The simulation technologies in which DAES has expertise have the dual advantage of meeting the safety and standards concerns of the nuclear industry, while optimizing your design projects. DAES helps you to rationalize your human and material resources in line with current standards, using ANSYS and the M-fem application.
Examples of our expertise
In the civil nuclear sector, DAES is involved in projects related to the following activities
- construction and operation of nuclear power plants
- Analysis of fluid and gas transport systems
- Pipe creep and burst analysis
- Accident simulation, pumps and valves, storage tanks
- radioactive waste management and nuclear waste burial ;
- Spent fuel cask design
- welding and analysis of residual thermal stresses, nuclear waste tanks, etc.
DAES is also working with renowned international partners to develop ambitious R&D projects across a broad spectrum of nuclear technologies, including fusion.
DAES has been contributing to the ITER project for over 5 years. It has expertise in the development of mechanical systems specific to a Tokamak such as the one under construction at the ITER site. The aim of ITER is to demonstrate that it is possible to convert the energy of the stars (thermonuclear fusion energy as it occurs within the stars, including our Sun) for the benefit of mankind, to produce a renewable, sustainable and inexhaustible source of energy to replace fossil fuels and thus limit global warming. The aim of ITER is to extract the energy from this fusion (hydrogen isotopes producing helium) which, once the process has been industrialized, will be used to produce heat and electricity.
DAES supports the design and dimensioning of such systems.
First wall blankets
The “first wall blankets” modules that form the tokamak’s internal “skin”. They have to withstand high stresses of various types (thermal stresses due to plasma and neutron radiation, electromagnetic and seismic stresses): At DAES, we are particularly involved in CFD, thermal, structural and electromagnetic analyses (according to RCC-MR, RCC-MRx, ASME III and ASME VIII rules).
Test Blanket Modules
Replacing the Test Blanket Modules (or TBMs) is a crucial part of the scientific program, and its complexity requires the use of advanced technologies in the design process. Extended reality techniques are used to design components and their replacement tools/means in the Tokamak building. Virtual reality is being used in the design of TBMs for the ITER project in collaboration with CEA. This collaboration focuses on the feasibility of replacing TBMs in hot cells. Some of these operations require human intervention in controlled areas. Today, virtual reality is a powerful tool for optimizing the ergonomics of the working environment, and thus reducing operator exposure times in contaminated areas. An operator immersed in real time in the virtual scale model, and interacting directly with objects in the work environment, can quickly identify accessibility problems that could compromise the completion of certain tasks. Once these problems have been identified, the design can be adapted and improved.
Tokamak Cooling Water System
The “Tokamak Cooling Water System” evacuates the thermal load due to the plasma of the systems installed on the tokamak; DAES is involved in the HELB (high energy line break) analyses of the piping (according to the rules of ANSI/ANS-58.2, ASME BPVC, ANSI/AISC, Eurocode 2 and Eurocode 3).
Engineering calculation software
DAES is involved in the development of a new software package (written in FORTRAN 90) based on a supercritical helium behavior model (“Supercritical helium CFD”): it enables the simulation of the thermal-hydraulic behavior of superconducting magnets cooled by 4K liquid helium, particularly in the event of a quench.
Ion Cyclotron Heating
The “Ion Cyclotron Heating” system heats (and thus accelerates) the ions contained in the plasma using 10 MHz electromagnetic waves: DAES is particularly involved in CFD, thermal, structural, seismic and electromagnetic analyses (according to RCC-MR, RCC-MRx, ASME III and ASME VIII rules).
Electron Cyclotron Heating
The Electron Cyclotron Heating system heats (and therefore accelerates) the electrons in the plasma using electromagnetic waves at 170 GHz: DAES is particularly involved in system engineering (definition of interfaces and load cases, propagation of requirements), integration and maintenance in the tokamak (nuclear) building, as well as in the design of the waveguides that carry this power (of the order of 1 MW per guide) between the klystrons that generate it and the plasma injection antennas.
Building and Civil Work
DAES also contributes to the project engineering activities of the “Building and Civil Work” section, in particular for the massive doors that provide containment and protection against nuclear radiation in the tokamak building.
Hot Cell and remote handling
DAES is involved in the design of all ITER’s hot cells… a huge project within a huge project! Our engineers are involved in the design of remote operation and machining equipment (robotized workstations) for the processing of medium-level radioactive waste: volume reduction by milling and cutting, detriation, compaction, packaging in nuclear containers, radiological characterization and container securing & decontamination.
DAES also supports private efforts towards commercial fusion, and is actively involved with private players developing these technologies, enabling them to benefit from its experience gained on ITER.
Gas pedal technologies require a great deal of study, often involving numerical simulations to predict the behavior of objects that can and should interact with particle beams. Here are just a few examples of the studies carried out by DAES:
CERN
The founders of DAES have been involved in several projects at CERN, starting with the famous LHC—where they contributed to the study of objects interacting with the proton beam—and extending to the Laguna LBNO ( Long Baseline Neutrino Oscillations) project, an underground neutrino observatory designed to study neutrino oscillations over long distances, investigate the Grand Unification of elementary forces, and detect neutrinos from astrophysical sources.
On the various projects, the DAES founders brought their expertise to bear on :
- Thermo-mechanical simulation,
- Thermal simulation
- Simulation and dynamic analysis
- Designing beam dumps
- Design of high-power targets (EURISOL, ESS, etc.)
- Design of radioisotope production targets.
ESS
Following on from CERN projects, the DAES founders were involved in the ESS (European Spallation Source) project. In fact, it’s the meeting point of its founders. SSE’s unique capabilities will far exceed and complement those of today’s leading neutron sources, opening up new opportunities for researchers in all areas of scientific discovery, including materials and life sciences, energy, environmental technologies, cultural heritage and fundamental physics. The spallation process will take place when the proton beam, accelerated up to 2GeV, strikes the tungsten bricks of the 4.9-ton “target” wheel, producing unprecedented neutron brightness for scientific experiments in several disciplines. The founders of DAES were responsible for :
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- The design of the rotating “target” wheel
- Definition of the overall architecture of the building containing the target
- Proton beam window design
- Defining the safety control system
VULCAN
DAES is the leader of the VULCAN project (Versatile Ultra-Compact Accelerator-based Neutron source) EUREKA-EUROSTARS E! 115722 with its partners DTI and Xnovo: VULCAN is a compact, “turnkey” pulsed neutron source, affordable and usable by research and technology organizations, industry and universities, in particular for training scientists in neutron techniques.
VULCAN’s applications include measuring the internal properties of metal and ceramic structures after any manufacturing process, including additive manufacturing, and measuring the evolution of metal anodes (deposition/stripping, dendritic growth) in Li-ion (or Li-polymer) batteries and fuel cells.
DAES is in charge of :
- Project management and systems engineering
- Defining the machine architecture right down to the neutron guide
- Target-moderator-reflector design
Validation tests of the Target-moderator-receiver assembly will be carried out at CERN’s gas pedal complex in 2023.
What our clients say
Out of respect for confidentiality, our clients are not named.
