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Terms and abbreviations

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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

A1 and A2

A1 shall mean the activity value of special form radioactive material that is listed in Table 2 or derived in Section IV and is used to determine the activity limits for the requirements of these Regulations. A2 shall mean the activity value of radioactive material, other than special form radioactive material, that is listed in Table 2 or derived in Section IV and is used to determine the activity limits for the requirements of these Regulations.

Absorption

Refers to the taking up of gases of vapors by liquids and/or solids where the gas or vapor fully penetrates the liquid of solid (adsorption is limited to the surface)

Acceleration of shipment

Negative and positive accelerations are dynamic, mechanical stresses which occur in two main types during the transportation of goods: regular acceleration forces and irregular acceleration forces Regular acceleration forces primarily occur in maritime transport. Acceleration of up to one g (g=9.81[m/s2])and, in extreme cases, even more, may occur due to rolling and pitching in rough seas. Such regular acceleration forces have an impact on the effort involved in load securing. Irregular acceleration forces occur during cornering or when a train passes over switches, during braking, starting up, hoisting and lowering. Such acceleration forces are not generally repeated, but they may occur several times at varying intensities during transport. These are the typical stresses of land transport and transport, handling and storage operations.

Accompanied combined transport

Transport of a complete road vehicle, accompanied by the driver, using another mode of transport (for example ferry or train).