Radiation Source Security Toolbox Talk

Radioactive sources used in construction, such as industrial radiography equipment and nuclear density gauges, must be protected from theft, loss, tampering, and unauthorized access. Even when not in use, radiation sources remain potentially hazardous and require strict security measures. Every worker involved in handling or working near radioactive sources has a responsibility to maintain security and immediately report any suspicious activity or security concerns.

This toolbox talk reviews the key principles of radiation source security and the responsibilities of workers for protecting radioactive materials on the jobsite.

Why This Matters

• Unauthorized access to radioactive sources can create serious health and safety risks.
• Secure storage helps prevent theft, loss, and accidental exposure.
• Maintaining source security protects workers, the public, and the environment.
• Prompt reporting allows immediate action if a security issue develops.
• Strong security practices support regulatory compliance and responsible source management.

Common Security Hazards

• Leaving radioactive sources unattended.
• Unlocked or unsecured storage areas.
• Unauthorized personnel handling radiation sources.
• Damaged locks, storage containers, or security devices.
• Vehicles containing radioactive sources left unsecured.
• Failure to verify source accountability before and after work.
• Missing source identification labels or security seals.
• Suspicious activity near radiation storage or work areas.

Safety Checklist

Before Work Begins

• Verify radioactive sources are stored in approved, secure containers or facilities.
• Inspect locks, storage containers, and security devices for damage or tampering.
• Confirm only trained and authorized personnel have access to radioactive sources.
• Verify inventory records match the sources in storage.
• Review transportation and security procedures before moving any source.
• Ensure emergency contact information and reporting procedures are readily available.

During and After Work

• Maintain continuous control of radioactive sources while they are in use.
• Never leave a radioactive source unattended or unsecured.
• Secure sources immediately when work is interrupted or completed.
• Keep vehicles transporting radioactive sources locked and attended or otherwise secured in accordance with company procedures.
• Report suspicious activity, damaged security devices, or unauthorized access immediately.
• Return sources to approved secure storage and verify accountability before leaving the site.

Crew Talking Points

• Who is responsible for the security of today's radioactive sources?
• Where are radioactive sources stored when they are not in use?
• What procedures must be followed when transporting a radiation source?
• What should workers do if they discover an unsecured radioactive source?
• Who should be notified if a source is missing, stolen, or suspected of being tampered with?
• Speak up immediately if you observe unsecured storage, damaged locks, unauthorized access, or suspicious activity involving radioactive sources.

Stop Work If

• A radioactive source is missing or cannot be accounted for.
• Storage containers, locks, or security devices are damaged or compromised.
• Unauthorized personnel have access to radioactive sources.
• A source has been left unattended or unsecured.
• There are signs of theft, tampering, or attempted unauthorized access.
• You are unsure whether radioactive sources are being properly secured.

Final Reminder

Radiation source security is everyone's responsibility. Keep radioactive sources under continuous control, secure them whenever they are not in use, limit access to authorized personnel, maintain accurate accountability, and report any security concerns immediately. Strong security practices help prevent loss, theft, misuse, and unnecessary radiation exposure while protecting workers, the public, and the environment.