Categories: General Purpose, Type B, Radiopharmaceuticals, Type B, Transport in USA, Type B

Package Type

Designed as a reusable Type B package for the shipment of solid and liquid radioactive materials, primarily medical radioisotopes.


Certified by the US NRC as a Type B(U) Package – the package meets all the requirements of 10 CFR 71 and the IAEA SSR-6 2018 Regulations for the Safe Transport of Radioactive Material. Validations for other countries are available.


The SAFKEG® 3979 LS packaging is designed to be robust and simple to use. The packaging consists of a stainless steel Outer Keg (Design No 3979) which carries a stainless steel and lead Containment Vessel (CV) Design No 3980, within a cork packing set.

The Outer Keg is fabricated in stainless steel with a flange type lid fastened by studs and nuts.

The CV is a lead shielded vessel fabricated from stainless steel incorporating a bolted lid fitted with double O–ring seals. Within the CV a variety of confinement inserts can be used to secure the contents and provide additional shielding.

Containment / Shielding

The containment system consists of the CV assembly, the containment being provided by the welded stainless steel cavity and bolted lid fitted with double O–ring seals. The CV lid is provided with a test point for leakage testing the containment system in accordance with ANSI N14.5.

The CV has Nom. 20 mm of lead shielding, with additional shielding provided by a variety of inserts available to carry the contents (this includes thin walled stainless steel inserts to maximise internal space to thick walled tungsten inserts to maximise shielding).

Approved Contents

  • The contents are solid or gaseous radioactive materials carried in suitable primary containers to aid operation and prevent contamination of the CV. The permitted radionuclides are numerous and varied and include a range of radiopharmaceuticals, including Molybdenum-99 (Mo-99),
    Lutetium-177 (Lu-177), Actinium-225 (Ac-225),
    Krypton-79 (Kr-79), Xenon-133 (Xe-133) plus others.
  • The radioactive contents are limited by the amount of shielding (including supplementary shielding provided by the confinement insert) together with a maximum contents heat output of 10 watts.
  • The existing inserts may be augmented with additional shielding where required.

Modes of Transport

By road, rail, sea and air.

Physical Data

Section through Package Design No 3979A
ComponentOuter Keg
Design No 3979
Containment Vessel Design No 3980Tungsten Insert
Design No 3984
Tungsten Insert Design No 3983Stainless Steel Insert Design No 3986
External Diameter (mm)424175626262
External Height (mm)483203.5107107107
Internal Diameter (mm)24664.5123150
Internal Height (mm)2751096573103
Tare Weight (kg)37225.84.91.0
Maximum Pemitted Contents Weight (kg)Contents limits are dependent upon content type and confinement insert. Please contact Croft for further information.
Maximum Gross Weight of Package (including Contents) (kg)65

SAFKEG 3979A _V1