Class 7 IAEA Regulatory Update – SSR-6 Rev. 1, June 2018

Radioactive material warning sign at the package

Regulations for the Safe Transport of Radioactive Material

– Specific Safety Requirements No. SSR-6 (Rev. 1)

As expected, the IAEA has published the 2018 amendment to SSR-6 as Revision 1 (SSR-6).

This Revision removes the term “radiation level” from Section 2 “Definitions,” replacing it by “dose rate” to designate the dose equivalent per unit time (e.g. mSv/h). The associated changes to sections referencing the term throughout the document account for many of the other paragraph (para.) changes.

Also deleted from this edition are the requirements for testing LSA-III material for residual water activity below 0.1 A2 in the 7-day leachate test.

Table 2 “Basic Radionuclide Values” has been updated to include entries for:
Ba-135m, Ge-69, Ir-193m, Ni-57, Sr-83, Tb-149 and Tb-161.


Perhaps the most significant change is the expansion of surface contaminated objects (SCO – “a solid object that is not itself radioactive but which has radioactive material distributed on its surface”) to add SCO-III provisions in the regulation. The Table 1 list of UN numbers, proper shipping names and descriptions now includes SCO-III to SCO-I and SCO-II for UN2913.

In addition to meeting the general requirements for the SCO designation, SCO-III objects are defined in para. 413(c) as a large solid object that is too large to be transported in the type of package described in SSR-6. There are other criteria to be met regarding sealing of openings, insides being as dry Continue Reading…