Technical Resources
Radiation Safety, Metrology & Irradiator Industry Publications
ATOM SPEC develops technical resources based on decades of experience supporting radiation safety programs, irradiator operations, calibration facilities, and radioactive material licensees. Our publications provide practical guidance related to equipment reliability, regulatory compliance, radiation measurements, and lifecycle management.
Radiation Safety & Irradiator Technical Guidance
ATOM SPEC develops technical resources to support Radiation Safety Officers, irradiator owners, researchers, and regulatory professionals responsible for maintaining safe and compliant radiation programs.
Featured Publications
The Continuing Role of High-Activity Cs-137 Reference Radiation Fields in Radiation Metrology
Balancing Security, Scientific Integrity, and International Traceability
Author: Christopher Vanderpool, RRPT, CRPA(R)
Publication Date: July 2026
This technical publication examines the continuing role of high-activity Cs-137 reference radiation fields within radiation metrology and the importance of preserving stable, reproducible, and internationally traceable calibration capabilities. The paper compares Cs-137 and X-ray reference fields, discusses measurement uncertainty and long-term stability, examines advances in modern Cs-137 source design and security, and considers the declining commercial availability of high-activity Cs-137 reference sources.
Do You Need a Build-Up Plate? Understanding Its Role in Cs-137 Survey Instrument Calibration
Technical Guidance for Radiation Calibration Laboratories, Health Physicists, and Calibration Professionals
Author: Christopher Vanderpool, RRPT, CRPA(R)
Publication Date: July 2026
This technical publication examines the role of build-up plates in Cs-137 radiation survey instrument calibration and explains why external build-up is not required for every detector. The paper discusses charged particle equilibrium, detector design, manufacturer calibration requirements, and the conditions under which external build-up should—or should not—be used.
Beyond Instrument Calibration: Why Cs-137 Gamma Radiation Reference Fields Require Routine Calibration, Validation, and Performance Verification
Guidance for Owners, Operators, Radiation Safety Officers, Authorized Service Providers, and Regulators
Author: Christopher Vanderpool, RRPT, CRPA(R)
Publication Date: July 2026
This publication examines the long-term management of Cs-137 gamma radiation reference fields used for radiation instrument calibration. Topics include calibration versus validation, measurement uncertainty, reference field stability, performance verification, and best practices for maintaining traceable calibration programs.
Inspection, Testing, and Preventive Maintenance Practices for Category I Self-Contained Gamma Irradiators
Guidance for Owners, Operators, Radiation Safety Officers, Authorized Service Providers, and Regulators
Author:
Christopher Vanderpool, RRPT, CRPA(R)
Revision 1 | June 2026
This technical white paper provides guidance for developing and maintaining inspection, testing, and preventive maintenance programs for Category I self-contained gamma irradiators.
Topics include:
✓ Regulatory and licensing considerations
✓ SSDR review and maintenance responsibilities
✓ Routine testing versus non-routine service
✓ Safety system verification
✓ Preventive maintenance best practices
✓ Documentation and recordkeeping expectations
Need assistance implementing an irradiator preventive maintenance program?
ATOM SPEC provides inspection, testing, preventive maintenance, calibration support, and lifecycle services for self-contained gamma irradiators.
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