SAFSHIELD 2773A: Type B Shielded Flask for Co, Cs and Ir

Designed as a B(U) package to the IAEA Regulations for the Safe Transport of Radioactive Materials 1996 and 2005 Editions (TS-R-1).

Certification

Certified by the UK Competent Authority under IAEA regulations, certificate number GB/2773A/B(U)-96.

Description

The outer container, casket design number 2773, is a double shell welded cylindrical casket manufactured in low carbon steel with a circular bolted closure at the base. The space between the shells is filled with phenolic resin foam as a thermal insulant.

The inner container, flask design number 2774, is a robust and compact shielded flask. The flask is of a welded stainless steel construction incorporating lead shielding. Access to the cavity is gained by removing a bolted flange and lead filled plug.

The assembly is carried within a carbon steel pallet, which is used for lifting by fork-lift truck and tie-down of the package.

Containment

The bolted flange of the inner container, design number 2774, is in the form of a separate flange with double O ring seals. The interspace between the O ring seals facilitates leakage testing to ensure the seals achieve the prescribed levels of leak-tightness. As the flange is separate from the shielded plug, the final closure and subsequent leakage testing can be carried out in a low radiation exposure area.

Approved contents

• Maximum activity of: Co-60 1110 TBq (30 kCi), Cs-137 3780 TBq (102 kCi), Ir-192 3000 TBq (81 kCi)
• Maximum heat emission not to exceed 462W
• Other contents could be approved