Online Tool for Calculating A Priori Scan Minimum Detectable Concentrations for Common Soil and Structural Surface...

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.