DAFI91-101_AMCSUP governs weapon configurations for nuclear safety protection, including side flash separation requirements.
View DAFI91-101_AMCSUP on armypubs.army.mil
It specifies clear-zone distances, shelter conditions, and exceptions for nuclear weapon operations. It requires approval for deviations from paragraph 5.10.
Weapon specific technical orders may apply additional lightning safe configurations for weapon and /or personnel safety.
The required side flash separation distance is properly applied to a nuclear weapon (or STMS) when an unobstructed minimum seven-foot clear zone exists between the weapon (or STMS) and the facility’s walls, ceiling, or any other structural member capable of conducting electrical energy (e.g., steel columns, rebar-reinforced interior walls, columns or beams).
Objects in the floor such as concrete rebar, floor grounds, and structural members of the Weapon Storage Vault, when the vault is in a full down position, do not require the application of the side flash separation distance.
Transient or temporary infringement of the side flash separation distance requirement can be permitted.
When using a Secure Transportable Maintenance System (STMS), no minimum side flash separation distance is required between the STMS and the HAS or PAS during nuclear weapon operations.