What is the size range described for Type B containers?

• A. Small handheld to 125 ton shielded steel casks
• B. Medium suitcase to large crate
• C. 1 kg to 5 ton
• D. 10 pounds to 2 tons

Answer: (A)

Type B containers are designed to safely transport materials with significant radioactivity, so they must cover a wide range of sizes to handle different contents—from small, handheld units to very large, heavily shielded casks. The large end, exemplified by shielded steel casks up to about 125 tons, is necessary for heavy, highly radioactive materials like spent nuclear fuel. This broad size range reflects the need to maintain strong containment and shielding across diverse payloads while still meeting strict safety requirements for transport under accident conditions. The other options describe sizes or weight scales that don’t align with how Type B packaging is used in practice, reinforcing why the description from small handheld to 125-ton shielded cask best fits Type B containers.