Type B M packages

Offering any Type B, Type B(U), Type B(M) packaging that failed to meet the approved DOT, NRC or DOE design, as applicable. 173.416 16,500. 

Contents limits for Type B(U) and Type B(M) packages are specified on the approval certificates. 

The 3000 Aj limit for non-special form material was established taking into account risk analysis work by Hubert et al. [9] concerning Type B package performance in air transport accidents. It is also the threshold qnantity for which shipment approval of Type B(M) packages is required. 

The intent is that the safety standards of Type B(M) packages, so designed and operated, provide a level of safety equivalent to that provided by Type B(U) packages. 

The Type C package provides similar levels of protection for the air mode when compared to a Type B(U) or Type B(M) package in a severe surface mode... 

Acconnt should be taken of melting, burning, or other loss of the thermal insu-lant or structural material upon which the insulant depends for its effectiveness in the longer duration of this fire compared with that for Type B(U) and Type B(M) packages. 

Where intermittent venting of Type B(M) packages is required, a complete description of the procedures and controls should be submitted to the competent authority for approval. Further advice may be found in paras 666.1-666.6. 

Each requirement in para. 820 should be applied separately. For example, a consignment of a vented Type B(M) package containing fissile material may need a shipment approval according to both paras 820(a) and 820(c). 

The need to apply para. 820 is governed by the actual contents of the package to be transported. For example, when a Type B(M) packaging, for which the package... 

RADIOACTIVE MATERIAL, TYPE B(M) PACKAGE, non-fissile or fissile-excepted ... 

Type B(M) packages and consignments under exclusive use shall not be transported on passenger aircraft. 

Type B(M) packages shall meet the requirements for Type B(U) packages specified in para. 650, except that for packages to be transported solely within a specified country or solely between specified countries, conditions other than those given in paras 637,653-655 and 658-664 above may be assumed with the approval of the competent authorities of these countries. Notwithstanding, the requirements for Type B(U) packages specified in paras 653 and 658-664 shall be met as far as practicable. 

Intermittent venting of Type B(M) packages may be permitted during transport, provided that the operational controls for venting are acceptable to the relevant competent authorities. 

Each Type B(M) package design, including those for fissile material which are also subject to paras 812-814 and those for low dispersible radioactive material, shall require multilateral approval. 

An application for approval of a Type B(M) package design shall include, in addition to the information required in para. 807 for Type B(U) packages ... 

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