Overview
EN ISO 23133:2022 - Nuclear criticality safety: Nuclear criticality safety training for operations (ISO 23133:2021) specifies minimum training requirements for personnel involved in operations that handle or process fissile material where a nuclear criticality safety assessment (per ISO 1709) is required. Endorsed by CEN, this standard sets high‑level requirements for training programs aimed at preventing and preparing for criticality accidents. It applies to on‑site activities and is not applicable to transport of fissile material outside nuclear establishments.
Key topics and requirements
- Scope and applicability: Training for areas, processes or facilities containing quantities of fissile material requiring criticality assessment; excludes external transport.
- Target groups: Operations staff, operations supervisors, and management - each with role‑based training expectations.
- Training program structure: Requires an operations nuclear criticality safety training program as part of the overall nuclear criticality safety program.
- Objectives: High‑level objectives include understanding the nature and severity of a criticality accident and the importance of maintaining safety (document details further objectives and role responsibilities).
- Roles and responsibilities: Defines functions such as nuclear criticality safety staff, criticality trainer, and training coordinator who support design and delivery of training.
- Training content and delivery: Specifies content areas, methods of delivery, and considerations for integrating emergency preparedness/response training (high‑level; ISO 11320 covers more specific emergency training).
- Evaluation, maintenance and records: Requires testing/evaluation of trainees, ongoing maintenance of competence, and retention of training records.
Practical applications
- Use EN ISO 23133:2022 to design, implement and audit nuclear criticality safety training programs for operational sites (nuclear plants, fuel cycle facilities, research reactors) handling fissile material.
- Support compliance with regulatory and organizational requirements for minimizing human‑factor risks that could lead to a criticality event.
- Integrate with site emergency preparedness and response planning to ensure operations personnel can recognise and respond to potential criticality incidents.
Who should use this standard
- Facility managers, safety managers and management with responsibility for nuclear criticality safety.
- Operations supervisors and frontline operations staff involved in production, processing or handling of fissile materials.
- Nuclear criticality safety specialists, training coordinators and instructional designers developing competency frameworks and training curricula.
Related standards
- ISO 23133:2021 (original ISO text adopted as EN ISO 23133:2022)
- ISO 1709 (definition and requirements for nuclear criticality safety assessment)
- ISO 11320 (specific provisions for emergency preparedness and response training)
Keywords: EN ISO 23133:2022, nuclear criticality safety, criticality training, operations staff training, fissile material, criticality accident.