All about SCN1 training (Common Nuclear Knowledge - Level 1)
Would you like to find out more about SCN1 - Savoir Commun du Nucléaire (level 1)? Find out in this article how this module works: objectives, target audience, aims... and find out more about the training organizations offering this type of training.
SCN1 nuclear clearance in detail
The Savoir du Nucléaire de Niveau 1 (SCN 1) training course is the first module in the CIN program.
The aim of this system is to pass on a common "nuclear culture" to all personnel, encompassing all the fundamentals needed to work safely and securely on nuclear power plants.
The program is designed to enable operators to acquire the specific knowledge they need in the fields of nuclear safety, quality assurance, conventional safety, radiation protection, the environment and fire safety in the context of EDF's nuclear facilities.
This scheme complements the regulatory "safety" training adapted to the workstation, and the training in quality assurance rules specific to each company, which is the responsibility of the employer.
The 5-day SCN level 1 training course is designed to enable all operators to implement a safety culture (protection of interests) during their work, and to adapt their behavior to each identified risk by applying the provisions described in the risk analysis for their site. This training is essential for the employer to issue HN1 and M0 authorizations.
Nuclear training objectives
At the end of SCN1 training, trainees will be able to apply the basic rules of safety culture, in relation to the protection of interests during their work, and to adapt their behavior to each identified risk by applying the provisions described in the risk analysis for their site: fire, general safety, quality assurance, environment.
Target audience
The nuclear training course is designed for anyone working on the production facilities of a nuclear power plant (CNPE) and requiring HN1 (or HN2) certification.
Interventions on the production tool correspond to the following activities:
- Preventive or corrective maintenance,
- Installation modifications,
- Fuel activities,
- In-service inspection,
- Operations related to maintenance and modification activities (scaffolding, insulation, handling, site assistance, industrial cleaning, radioactive remediation, warehouse management, etc.),
- Intrinsic qualification or requalification testing of equipment, including preparation, execution and analysis of results,
- On-site repairs,
- On-site technical assistance and intellectual services
- Metrology...

Level of prior knowledge required
- Have received training in general risk prevention in accordance with the French Labor Code
- Proficiency in the language of instruction: reading, writing, speaking
Animation language
This training is led by one or more instructors who master the language of instruction. However, depending on the training organization, it can also be given in several languages.
Course duration
Initial training lasts 35 hours and refresher training 14 hours.
NB: For courses held in a language other than French, this duration may be increased by one hour per day.
The companies concerned
Any company working on the industrial installation of a nuclear power plant.
Certificates and authorizations issued
On successful completion of the course, trainees will be awarded a SCN1 CEFRI training certificate. This certificate is a prerequisite for HN1 and M0 clearance by the employer.
Certificate validity
The SCN1 certificate is valid for 4 years, during which time it can be used on a nuclear power plant. Once this period has elapsed, the trainee will have to undergo refresher or initial training, at the employer's discretion.
Teaching objectives - Target skills
At the end of SCN1 training, trainees will be able to:
- Apply operator-specific basic rules on nuclear safety (including PFI) and quality assurance
- Apply basic operator-specific rules relating to conventional safety
- Apply the operator's basic environmental rules
- Apply the operator's basic fire rules
NB: The objectives are the same for initial and refresher training.
Choosing a nuclear training organization
Key factors to consider
- A CEFRI-certified and EDF-approved training organization
- A training site: SCN-CSQ CEFRI-certified and EDF-approved
- Trainers qualified by the training organization according to CEFRI and EDF requirements, with a genuine teaching approach and technical expertise.
Nuclear training by Onet Technologies
A major player in nuclear training, Onet Technologies Formation has 70 training rooms and 31 training sites, including 17 SCN-CSQ training sites, spread over 14 different sites in France. Our agency, certified and approved for over 15 years, supports 30,000 trainees every year, and is a specialist in regulatory and qualification training in the nuclear and industrial sectors.
Onet Technologies Formation's 100-plus trainers, whose experience in the field is a real added value, are constantly adapting their training courses, methodology and teaching methods to keep pace with regulatory changes.

SCN1 training by Onet Technologies
To meet all the specific requirements of nuclear services, Onet Technologies provides level 1 Common Nuclear Knowledge training. It lasts 35 hours, including 6h30 spent on an EDF-approved training site. The number of trainees can vary from 6 to a maximum of 12.
This training is led by one or more of our trainers.
For this SCN1 training course, Onet Technologie developed a detailed virtual reality tour of a reactor building to help trainees understand how it works, even before they take their first steps in a nuclear power plant.
Since January 2022, Onet Technologies Formation has trained 627 trainees, 96.7% of whom passed the SCN1 course.
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