--- type: page title: Radiation Therapy Bunker for Linear Accelerators (LINAC Vault) handle: linac-vault url: https://lead-glass-pro.myshopify.com/pages/linac-vault published_at: '2026-02-05T20:01:43.000Z' --- Radiation Therapy Bunker (LINAC Vault) Shielding Solutions ========================================================== ![](https://cdn.shopify.com/s/files/1/0013/7202/8986/files/LGP_LinAc_Room_600x600.png?v=1770322416) Radiation Therapy Bunkers—commonly referred to as **LINAC vaults**—are specialized treatment rooms designed to house **medical linear accelerators** used in external beam radiation therapy. These systems generate **high-energy X-rays and electrons**, requiring shielding assemblies that are far more robust than diagnostic imaging environments. While every vault must be designed from a **site-specific physicist shielding report**, the core goal is consistent: contain primary radiation, secondary scatter, and (at higher energies) potential neutron production, while maintaining strict compliance with radiation safety requirements. * * * High-Energy Shielding Requirements ---------------------------------- Radiation therapy rooms demand some of the **most substantial shielding** in medical construction. Typical vault construction is driven by beam energy, workload, geometry, and occupancy around the room. ### High-Density Concrete Walls * Concrete barriers of **4 to 8 feet** thickness are common for primary beam attenuation. * Often poured using **high-density concrete** (e.g., baryte mixes) where required by design. * Thickness varies by beam direction, use factors, and adjacent occupancy. ### Supplemental Lead Shielding * Commonly combined with concrete to address **localized scatter** and leakage pathways. * Used at doors, frames, penetrations, ductwork transitions, and other complex interfaces. * Supports shielding continuity where geometry limits concrete thickness. ### Ceiling and Floor Shielding * Ceilings are engineered for beam angles, upward scatter, and spaces above the vault. * Floors may require additional attenuation depending on occupancy below. * Structural constraints often dictate composite approaches (concrete + lead/steel where needed). * * * Maze Entrances and Vault Door Systems ------------------------------------- ### Maze Entrance Design Many LINAC vaults use a **maze entrance**—a zigzag or dog-leg hallway that prevents direct radiation streaming to the exterior. The maze reduces exposure by using geometry and distance rather than relying solely on a massive door. * Helps minimize or eliminate the need for extremely thick door assemblies. * Often incorporates targeted lead shielding at turns, choke points, or line-of-sight areas. * Supports efficient staff flow while maintaining radiation safety. ### Motorized Radiation Vault Doors When a maze is not feasible due to space constraints, a **heavy motorized vault door** may be used to maintain the required attenuation at the entry. * Layered construction using lead, steel, and high-density materials as required by design. * Precision detailing to maintain shielding continuity at the frame and thresholds. * Engineered for reliable, repeatable operation in high-throughput clinical environments. * * * Safety Interlocks and Radiation Control Systems ----------------------------------------------- Radiation therapy rooms are built with **fail-safe safety interlock systems** that help ensure the beam can only be generated when the room is properly secured. * Automatic beam shutdown if the door is open or an interlock condition is triggered. * Redundant interlock circuits integrated with the accelerator and access controls. * Visual/audible warning systems to support safe room entry procedures. * * * Shielded Openings and Penetrations ---------------------------------- Every penetration through the vault—no matter how small—must be coordinated to maintain shielding integrity. Common examples include: * **Lead glass viewing windows** for patient monitoring * Shielded electrical/data penetrations and equipment pathways * HVAC duct shielding and labyrinth-style baffles * Shielded pass-throughs for utilities and specialty workflows * * * Coordination with Physicists, Engineers, and Contractors -------------------------------------------------------- No two LINAC vaults are identical. Shielding requirements depend on accelerator energy and modality, workload, room layout, and the occupancy of adjacent spaces. Lead Glass Pro supports projects by supplying **precision-manufactured shielding components** that align with the physicist’s approved design. * * * Manufacturer-Direct Shielding Components ---------------------------------------- Lead Glass Pro provides radiation shielding products engineered for high-energy therapy environments, including: * Custom lead glass viewing windows * Lead-lined frames and wall assemblies * Shielded door accessories and specialty shielding components * Solutions for complex vault geometries and penetrations Request a Quote or Technical Review ----------------------------------- Planning a new LINAC vault, an expansion, or an upgrade to an existing radiation therapy room? We can help coordinate product selection and specifications to match your shielding report. **Phone:** [(800) 506-9972](tel:18005069972) **Email:** [sales@leadglasspro.com](mailto:sales@leadglasspro.com) **Website:** [leadglasspro.com](https://leadglasspro.com)