Requirements for Type C packages

Type C packages shall be designed to meet the requirements specified in paras 606-619, and of paras 634-647, except as specified in para. 646(a), and of the requirements specified in paras 651-655, 659-664, and, in addition, of paras 668-670. 

A package shall be capable of meeting the assessment criteria prescribed for tests in paras 657(b) and 661 after burial in an environment defined by a thermal conductivity of 0.33 W/(m-K) and a temperature of 38°C in the steady state. Initial conditions for the assessment shall assume that any thermal insulation of the package remains intact, the package is at the maximum normal operating pressure and the ambient temperature is 38°C. 

A package shall be so designed that, if it were at the maximum normal operating pressure and subjected to  

Where mixtures of different radionucUdes are present, the provisions of paras 404—406 shall apply, except that for krypton-85 an effective A2 ) value equal to IOA2 may be used. For case (a) above, the assessment shall take into account the external contamination limits of para. 508. 

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The concept of low dispersible radioactive material applies only to qualification for exemption from the requirements for Type C packages in the air transport mode. 

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