How should doorways be managed in containment zones?

How should doorways be managed in containment zones?

• A. Keep doors open to ease access.
• B. Doors propped open during construction.
• C. Keep doors closed or self-closing, minimize openings, consider airlocks, ensure seals and access control.
• D. Doors removed to improve airflow.

Answer: (C)

Maintaining a controlled physical barrier at doorways is essential to preserve containment by protecting the airflow between zones. Doors should be kept closed or self-closing so they automatically return to a closed position after passage, which preserves the intended pressure difference and prevents unfiltered air from moving between spaces. Minimizing openings further limits the amount of air that can leak between zones, helping to maintain the necessary pressure gradients and reduce contaminant spread. If available, using airlocks provides a staged transition with controlled air exchange, offering an extra layer of containment. Ensuring seals are intact and access is controlled means only authorized personnel can pass, often with appropriate PPE, which reduces contamination risk from doorways themselves. Leaving doors open, propping them, or removing doors would break the barrier, allowing uncontrolled air flow and compromising containment.

Maintaining a controlled physical barrier at doorways is essential to preserve containment by protecting the airflow between zones. Doors should be kept closed or self-closing so they automatically return to a closed position after passage, which preserves the intended pressure difference and prevents unfiltered air from moving between spaces. Minimizing openings further limits the amount of air that can leak between zones, helping to maintain the necessary pressure gradients and reduce contaminant spread. If available, using airlocks provides a staged transition with controlled air exchange, offering an extra layer of containment. Ensuring seals are intact and access is controlled means only authorized personnel can pass, often with appropriate PPE, which reduces contamination risk from doorways themselves. Leaving doors open, propping them, or removing doors would break the barrier, allowing uncontrolled air flow and compromising containment.