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Fluid and Nuclear Ventilation Process and Systems Architect

  • Location : Aix-en-Provence technical platform
  • Contract : cdi
  • Start date : 01/12/2023

Mission :

Field: Engineering / Architecture

Attachment: Technical Department / Architecture and Integration Unit

Profile: Experienced Architectural Engineer; Disciplines: Engineering, Processes, Fluid Systems and Ventilation, Operation, Mechanics


Calogena was created within the Gorgé industrial group to develop, market, build and operate 30 MW thermal modular heat reactors to supply carbon-free heat to urban grids.

The Calogena reactor is a water-based SMR, with a very passive and simple design, which provides it with very robust safety. Calogena is the winner of the France 2030 call for “innovative reactors” projects.

The preliminary design of the reactor is committed until 2025. This will be followed by a detailed three-year design and then the production of a prototype to prepare for the transition to the reactor series. Construction is expected to begin in 2030.

The APS team is in the process of gaining momentum. It is organized as a Project Platform, with an extended team capacity involving strategic partners. The Technical Platform is located in Aix-en-Provence.

The Project team consists of a project unit, an architecture unit, and a business unit. The cells are positioned on the Project Platform, placed under the responsibility of the Technical Department.

The architecture unit brings together the skills and abilities to carry out the development of the project in interaction with the managers of the project unit and the business unit.

Tasks assigned :

You will join the Calogena reactor module project team

You join the architecture cell.

In conjunction with the technical director, you will be responsible for process and systems architects.

You are in charge of specifications, design and studies related to:

– the fluid and gas circuits of the reactor;- the nuclear and conventional ventilation of the reactor;- the fluids and gases of the reactor.

as well as associated steering and coordination actions.


Your main responsibilities will be as follows:

  • Responsible for the functional definition, process and operating profiles of circuits, ventilation and utilities, in normal and degraded conditions, and during shutdown and start-up phases;


  • Responsible for the specification, design, studies and Definition Justification (DDI) files of the circuits: heat transfer (secondary circuit), pool, purification (primary, secondary, pool), gas (including nitrogen pressurization);


  • Responsible for the specification, design, studies and DJD of fluid utilities (including demineralized water) and gases (including nitrogen and compressed air);


  • Responsible for the specification, design, studies and DJD of the nuclear ventilation and conventional ventilation circuits of the reactor, including normal and accidental filtration;


  • Responsible for the specification, design, studies and DJD of the ultimate means, including the extraction of residual power in DEC and DEH Design Extension situations;


  • Responsible for the process and mechanical interface with heat networks and heat applications;


  • Interface with the integration architect: determination of modularization strategies and methods (manufacture and assembly of circuits and ventilation);


  • In interface with the integration architect and the digital model manager: development and control of system data and digital installation model;


  • Interface with the safety engineer: development and control of safety data for licensing;


  • Interface with the PMO manager: elaboration and control of planning data and associated costs.

Candidate profile :

You have a Bac+5, a graduate of an engineering school or equivalent foreign training, at least M.Sc.Eng.

You have an experienced and proven profile in the nuclear sector. Your profile includes at least 10 years’ experience in major industrial designs and achievements, rejuvenations or major modifications, at the scale of an NBI, in the fields of fluids and ventilation.

This experience has been gained in the context of new nuclear reactor projects or existing or new nuclear facilities with similar processes or systems.

You have demonstrated experience in project management, technical decision-making and complex business management.

Your experience has allowed you to strengthen a strong culture of process and systems design at the scale of a nuclear facility, a strong safety culture and a strong focus on operations.

Particular experience in the fields of industrialization, manufacturing and construction monitoring on the scale of large projects is an asset for the position.

You have an approach that is both very rigorous and very agile, pro-active. You have a demonstrated ability to coordinate and manage teams or external studies.

You have strong organizational, structuring and synthesis skills, combined with solid technical and practical knowledge in the fluid and ventilation fields.

You have a practical understanding of regulations and associated codes and standards.

You have good writing skills.

You have a good command of computer tools in project design, in particular relating to study activities, calculations, diagrams/plans/isos/BOM/BOQ necessary for engineering files.

You know how to effectively combine the control of quality, safety, cost and planning objectives with a capacity for proposals, advice and resolution within the Plateau team.

You have very good listening and communication skills, a strong aptitude for a wide variety of internal and external contacts, a strong team spirit.

You have a good level of English, reading, writing, speaking. Proficiency in a second European language is a plus.

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