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Fast, Effective Contamination Monitoring

Mirion's personnel and object contamination monitors enhance safety and efficiency in nuclear facilities. These systems streamline the screening process, quickly detecting radioactive contamination on workers and objects — reducing delays at Radiologically Controlled Area (RCA) exits, and minimizing health risks while preventing contamination spread.
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Rapid Personnel Contamination Detection at Radiologically Controlled Area (RCA) Exit Points

Nuclear facilities require fast, reliable contamination detection at exit points to maintain controlled movement of personnel and prevent contamination spread — particularly during outages and high-traffic periods. As screening volumes increase, delays, inconsistent workflows, or missed detection events can disrupt operations and increase compliance risk.

A structured contamination monitoring approach supports fast, consistent screening at Radiologically Controlled Area (RCA) exitpoints without compromising accuracy or operational flow:

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High-Throughput Screening

Fast, efficient personnel monitoring to support high-volume RCA exit points

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Repeatable Workflows

Consistent screening procedures to reduce variability in execution

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Reliable Results

Accurate, audit-ready detection to support operational and compliance needs

Supporting Systems for Radiologically Controlled Area (RCA) Exit Point Monitoring

Effective contamination monitoring at Radiologically Controlled Area (RCA) exitpoints requires coordinated solutions that support high-throughput screening, consistent workflows and reliable detection across operational conditions.

  • Support rapid personnel screening at RCA exit points with Sirius™ Contamination Monitors
  • Enable automated, repeatable whole-body monitoring with Argos™ Whole Body Monitors
  • Support portal-based monitoring for broader detection needs with the GEM™-5 Gamma Exit Monitor

Hand & Foot Contamination Monitoring

For personnel working in nuclear environments where full body monitors are not required, or as a precursor to a full body scan, Mirion hand and foot monitors provide thorough, reliable detection of external contamination on hands and feet. These monitors feature ergonomic design, outstanding detector sensitivity and intuitive user interfaces.

Key Benefits

  • Well-suited for mobile contamination checkpoints —quickly able to be moved and redeployed with minimal effort
  • Consistent monitoring performance unlike manual hand frisking

Compact Personnel Contamination Monitors

Maximize Space, Safety & Efficiency in Radiologically Controlled Areas (RCAs)

Mirion’s compact personnel contamination monitors deliver proven detection performance in space-efficient, portable designs — ideal for radiologically controlled areas where fast setup and minimal training are essential. These compact solutions combine reliable contamination detection with intuitive operation to maintain safety and compliance in even the most constrained environments.

Sirius™-5 Compact

For comprehensive hand, cuff, and foot monitoring in confined areas

  • Measures hands, cuffs, and feet simultaneously in a one-step operation
  • Choice of gas flow proportional or plastic scintillator detectors for alpha, beta, or gamma monitoring
  • Integrated casters and handle for easy movement and temporary setups
  • Rugged construction for high-traffic areas; designed for 24/7 uptime with minimal maintenance
  • IEC 61098 and ISO 11929:2019 compliant

Sirius™ Core

For fast deployment and minimal training needs

  • Two-step hand and foot contamination monitoring process
  • Ultra-compact, portable design for tight or temporary spaces
  • Optional alpha/beta frisker and rugged transport case

Shared Technology & Features

  • WebRemote® interface for fast setup and intuitive use
  • Built on Windows® 11 IoT platform for secure, modern operation
  • Shared components across Mirion contamination monitoring platforms to simplify servicing and reduce spare-part inventory
  • Seamless CeMoSys™ connectivity for centralized data access

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Does your site need exceptional radiological performance in a smaller, movable package?

Contact us to learn more about our compact personnel contamination monitoring solutions.


Whole Body Contamination Monitoring

Whole body contamination monitors provide thorough, reliable detection of external contamination on personnel working in nuclear environments. These monitors are used to clear personnel from RCAs and boundary zones in nuclear power plants and other industries, including fuel cycle, national laboratories, and Department of Energy (DOE) facilities.

Key Benefits

  • Detection capabilities that exceed industry expectations
  • Durability, and ease of use and maintenance

Tool & Object Contamination Monitoring

Mirion tool and object contamination monitors provide exceptional radiological performance–including fast response, quick contamination identification and spectroscopic capabilities.

Key Benefits

  • Broad range of options for various object sizes
  • Specialized operating modes
  • Many options available to suit unique needs

Whole Body Gamma Portals

Mirion Whole Body Gamma Portals enable high throughput for detection of gamma emitting surface contamination and are ideal for identifying hot particles or spread contamination.

Key Benefits

  • Combine flexible modes of operations
  • Exceed industry standards of <1% of an ALI sensitivity for passive monitoring for intakes of radioactive material
  • Feature different shielding options
  • Spectroscopic capability options for enhanced background rejection

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