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Related Concept Videos

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Updated: Mar 10, 2026

In Situ Soil Moisture Sensors in Undisturbed Soils
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Online Tool for Calculating A Priori Scan Minimum Detectable Concentrations for Common Soil and Structural Surface

David A King1, Nickolas Altic

  • 1Oak Ridge Associated Universities, 210 Badger Avenue, Oak Ridge, TN.

Health Physics
|March 9, 2026
PubMed
Summary
This summary is machine-generated.

Calculating minimum detectable concentration (MDC) values for radiation surveys is complex. A new free online tool simplifies this process, offering accurate calculations for various detectors and radiation types, improving survey planning.

Keywords:
detectoroperational topicsradiationradiation safetysafety standards

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Area of Science:

  • Environmental Science
  • Radiation Detection and Measurement
  • Nuclear Safety

Background:

  • Calculating minimum detectable concentration (MDC) values using NUREG-1507 is complex, often requiring specialized expertise and software.
  • Current reliance on generalized MDC values from NUREG-1507 or MARSSIM may not meet specific project needs, detector types, or environmental conditions.
  • Existing guidance primarily addresses sodium iodide (NaI) detectors for gamma radiation in soil, excluding alpha/beta radiation on surfaces.

Purpose of the Study:

  • To develop a more accessible and versatile method for calculating scan MDC values.
  • To provide a tool that accommodates a wider range of detectors and radiation types beyond gamma on soil.
  • To support the creation of more accurate and project-specific radiation survey plans.

Main Methods:

  • Development of a free online tool by Oak Ridge Associated Universities (ORAU).
  • Implementation of updated NUREG-1507 guidance within the tool.
  • Inclusion of MDC calculation capabilities for diverse detectors (e.g., NaI, others) and radiation types (gamma, alpha, beta) on various surfaces.

Main Results:

  • A user-friendly, free online tool is now available for MDC calculations.
  • The tool supports a broader spectrum of detectors and radiation types compared to traditional methods.
  • Enhanced ability to perform accurate, project-specific MDC calculations for improved survey planning.

Conclusions:

  • The ORAU online tool simplifies the complex process of MDC value calculation.
  • It enhances the accuracy and applicability of radiation survey plans by accommodating diverse scenarios.
  • This resource democratizes access to essential radiation survey planning tools, reducing reliance on expert knowledge and expensive software.