URANIUM HEXAFLUORIDE IN TRANSPORT ACCIDENTS

After a brief description of the physical and chemical properties of UF and of the products of its hydrolysis, U02F2 and HF, the problem of the radiological and chemical risks in transport accidents is analysed. 'Acceptable levels of exposure' for making rough safety decisions based on chemical hazards are suggested . The present practice in the transport of UF6 is described and some apparent inconsistencies and the different levels of safety used to protect against chemical or radiological hazards in transport are noted. Finally, a mass limit for UF6, based on chemical hazards, is derived and the main questions to be answered in relation to safety requirements in the transport of UF6 are presented.