Which items do not require nuclear safety certification for use in operations with nuclear weapons?

General-purpose hand tools do not require nuclear safety certification for use in operations with nuclear weapons because they are specifically designed for routine tasks that involve physical manipulation of components rather than complex interactions that could affect nuclear safety. These tools are typically standardized and widely available, posing minimal risk in terms of compromising safety protocols or triggering nuclear incidents.

In contrast, heavy machinery and electronic devices are often involved in operations that require stricter oversight due to their potential to interact with or impact nuclear weapon systems. Transportation vehicles, while also needing to adhere to safety protocols, may carry more variables such as payload and environmental factors, necessitating certification to ensure safety in transportation scenarios involving nuclear materials. This distinction highlights why general-purpose hand tools are categorized differently regarding certification requirements.