The Under-Vessel Stair Lock is a Health Physics Engineered Barrier designed to restrict access to the AP1000 under-vessel area. The locking system provides both physical deterrence and visual control to improve radiological boundary integrity during outage or maintenance conditions.
Key Features
Access Control: Prevents unauthorized entry into under-vessel areas during radiological or maintenance work
Robust Mounting: Requires installation using (8) 3/8" diameter mounting holes (field-drilled) for secure, semi-permanent attachment
Locking Arm: Integrated locking mechanism enables LOTO (Lock-Out-Tag-Out) for enhanced compliance and safety
High Visibility: Contrasting materials and integrated hardware increase awareness and help reinforce safe behaviors
Construction & Materials
Frame & Grating: Durable steel construction with welded grid floor insert
Custom Fit: Tailored to integrate with existing stairwell structure at Vogtle Units 3 & 4
Radiological Suitability: Design enables easy cleaning and decontamination
Engineered for straightforward field installation and dependable performance, this barrier enhances radiological control and improves access management protocols in AP1000 operations.
