Proposal of the Standard for Dose Rate Increase under Normal Test Conditions

Among the revised points in the 1985 edition of the IAEA Regulations. the acceptance criteria for shielding integrity after testing at normal conditions of transport is one of the most important points in designing and testing package. The sentence \"It would prevent any increase of the maximum radiation level\" that appears in 1973 edition has been changed to \"It would prevent more than a 20% increase in the radiation level at any external surface\". With respect to the new reQuirements in the 1985 edition. the necessity of considering any external surface and the meaning of a 20% increase are being discussed worldwide. The object of this research is to propose an updated and more justifiable standard for dose rate increase under normal test conditions than that adopted in the IAEA Transport Regulations. the 1985 edition, taking into account the evaluated influence of deformations in the package on the surrounding radiation field and the difference of exposure level according to the method of operation of the transport operator.