TS ISO 12749-1

TS ISO 12749-1 is a vocabulary standard that organises the core concepts used across nuclear energy, nuclear technologies, and radiological protection. This part provides the minimum essential information for concepts represented by a single term, including definitions and, where appropriate, notes and examples, with the aim of improving technical communication and supporting a shared understanding of meaning.

How the terminology is used across the nuclear field

In nuclear-related work, terminology does more than label objects or processes: it fixes the intended concept, the context of use, and the distinctions between closely related terms. That matters in areas such as reactor technology, the fuel cycle, radiation protection, and supporting safety documentation, where ambiguity can lead to inconsistent interpretation. The scope here is the basic cross-cutting conceptual layer shared by these fields.

What this part is designed to do

This document is not a design code or a test method standard. Its role is definitional: to give users a common language for concepts that appear across several nuclear disciplines. By setting out concise terminology, it helps engineers, technical writers, operators, and protection specialists use terms consistently in procedures, reports, training material, and specifications.

• Brings together concepts shared by nuclear energy and nuclear technologies.
• Also covers terminology relevant to radiological protection.
• Provides the minimum essential information for each term, with notes and examples where useful.
• Supports communication and common understanding across disciplines.