Special provisions for tank transport and Class 7 radioactive material
What this domain tests
Tank-specific operating rules and the special regime for Class 7 radioactive material. These are separate chapters because both have additional hazards and paperwork.
Core rules - tanks
- Use the tank code from Table A; check test dates, capacity, pressure and fittings.
- Respect the filling degree: leave ullage for expansion. Do not overfill; use the dipstick or flow meter.
- Ground and bond before loading flammable liquids; use bottom loading where required; close valves and fit caps before moving.
- Tank vehicles need the correct ADR certificate, placards and orange plates; some need thermal protection or an emergency shut-off.
Core rules - Class 7
- Packages: excepted, industrial, Type A, Type B, Type C. The package type depends on activity and surface dose rate.
- Labels: I-WHITE (TI = 0), II-YELLOW (0 < TI ≤ 1), III-YELLOW (1 < TI ≤ 10). Transport index (TI) is not the same as dose rate.
- Segregation: keep radioactive packages away from people and undeveloped film; use the segregation table and exclusive-use rules.
- The transport document must show the UN number, proper shipping name, Class 7, category, TI and activity.
Worked example
A Type A package has a transport index of 0.5. It gets a II-YELLOW label, not I-WHITE, because TI is above 0. The consignor records TI 0.5 on the document and checks the vehicle placards. If the same package had TI 1.2 it would be III-YELLOW.
Traps
Confusing TI with the dose rate at the package surface. Using a Type A package for activity above its limit. Overfilling a tank because it is cool. Forgetting tank test dates. Missing the Class 7 label category.