GlossaryEN1 min readUpdated: Jun 23, 2026

Class 7 Dangerous Goods Transport

Safeguarding transport workers, the public, and the environment from ionizing radiation is the overriding purpose of Class 7 regulations, which apply to radioactive materials once their activity exceeds specified exemption limits—making this the most stringent category in dangerous goods transport.

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Last updated: 23 June 2026Published: 19 June 2025

Source: https://www.iaea.org/topics/transport-of-radioactive-material

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Definition & Explanation

Safeguarding transport workers, the public, and the environment from ionizing radiation is the overriding purpose of Class 7 regulations, which apply to radioactive materials once their activity exceeds specified exemption limits—making this the most stringent category in dangerous goods transport. The IAEA Safety Standards (SSR-6) provide the binding technical baseline, incorporated into ADR (road), RID (rail), IMDG Code (sea), and ICAO TI (air). Shippers select the package type—excepted, Type A, Type B, or Type C—based on the material's physical form and activity level; shipping documents must state activity values and dose rates. Each package bears the trefoil radiation symbol and a Transport Index (TI) indicating the dose rate at one metre. Certain consignments—such as spent nuclear fuel or high-activity radiopharmaceuticals—require competent authority approvals, and all handling personnel must receive radiation protection training.

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