Reporting to the "Calculations" Unit Manager, you will work on complex thermal and mechanical equipment design projects for the nuclear industry, and carry out various thermal, hydraulic and thermo-hydraulic (and possibly mechanical) studies in collaboration with other teams or departments in the Onet Technologies technical department.

In this context, your main tasks will be as follows:

Participate in all project life cycle phases, from the tender phase, studies (feasibility, preliminary design, detailed design, execution design, etc.), implementation (consultations, contractualization, execution, assembly), factory acceptance tests, to on-site commissioning (assembly and testing).

Participate in the design of various systems and equipment in collaboration with the project team and other engineering departments within the Technical Department.

Analyze input data from tenders, projects, or business cases, and define and justify calculation hypotheses based on equipment life cycle phases, in accordance with nuclear regulatory standards

Perform thermo-hydraulic (and potentially mechanical) sizing calculations (using finite element and analytical methods) in accordance with nuclear regulatory standards.

Generate technical documentation within their area of expertise, strictly adhering to the defined technical scope.

Draft specifications, consult suppliers, and analyze received proposals.

Participate in the technical verification of deliverables produced within their area of expertise.

Participate in and/or lead technical meetings, whether internal, with clients, or with subcontractors and suppliers

- Anticipate and identify potential technical, cost, and scheduling issues, and propose areas for improvement.

Your assets

5 years' higher technical education (engineering school or university equivalent) in fluid mechanics, thermal-hydraulics and numerical simulation, ideally with a minimum of 5 years' experience in thermal-hydraulic calculations in a nuclear design office.

A basic knowledge of mechanics would be a real plus.

- Proficiency in at least one of the following software packages: Aspen EDR, EchTherm, HTRI

Knowledge of ANSYS CFD software (CFX or Fluent)

Ideally, you will have initial experience in the following areas:

Thermo-hydraulic (and potentially mechanical) design and sizing of heat transfer equipment

- CFD numerical simulations

You therefore have solid experience in nuclear equipment, particularly under pressure.

This position may be subject to an administrative investigation. Onet has a long-standing commitment to diversity and disability. Onet recruits and recognizes all talents.

Our business

Onet, a French family-owned group founded in 1860, is an international player in engineering and services. Its more than 70,000 employees work every day to help create ever healthier, safer and more reliable environments.

More about Onet

Onet Technologies is a recognized player in engineering, maintenance and on-site operations for the nuclear industry. We offer our customers end-to-end solutions, from engineering studies and plant operation to manufacturing and on-site deployment. We are 3,000 enthusiasts who have been tackling the challenges of nuclear energy for over 40 years. Onet Technologies is part of the Onet Group, an engineering and services group.

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