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Office of Radiation Control

Office of Radiation Control

Welcome to the Office of Radiation Control (ORC). Our mission is to protect the health and safety of Delawareans by regulating the use of ionizing radiation in medicine, industry, research and education, and to provide health protection resources in the event of a radiological emergency.

This office performs pre-operational inspections for new radiation machine facilities, inspects and registers facilities that use radiation machines, registers facilities that use radioactive materials, registers radiation service providers, and issues certificates for administering radiation to human patients, by qualifying medical and dental radiation technologists and technicians.


Effective March 1, 2017, applicants for state medical certification exams (limited scope medical, and bone densitometry) will not submit payment when making application to the Office of Radiation Control. They will continue to fill out application form no. R-16-S, however payment will not be made to the state. Instead, the application form will be submitted to the Office of Radiation Control, who will submit the applicants information to the American Registry of Radiologic Technology (ARRT) who will then contact the applicant directly to provide information on scheduling the exam and collect payment. A revised application form will be posted to this webpage on March 2, 2017.

Verification of Delaware Certified Listings

Certified Radiation Technologists and Technicians
(searchable PDF)

Registered Radiation Service Providers
(searchable PDF)



Delaware Radiation Control Regulations

Office of Radiation Control Webpage Brochure


XRay Machine Facility Registration Permit Manual (PDF)

Delaware Radiation Control Program Report for 2015 (PDF)

Declaration of Pregnancy - Sample Letter

Delaware Notice to Employees of Radiation Source Facilities - Form X (PDF)

Applying For Certification or Registration Without a Social Security Number

Regulatory Program Areas

Please click on one of the four programs below to see more details about that program:
Radiological Technician/Technologist Information
Radiological Technologist & Technician Certification
State licensure of individuals
Radiation Machine Facility Information
Radiation Machine Facility Registration
State regulatory oversight of facilities that possess radiation machines
Radiation Service Provider Information
Radiation Service Provider Registration

State registration of companies or persons who provide professional services to radiation source facilities
Radioactive Material Facility Information
Radioactive Material Facility Registration

State registration of facilities that possess radioactive materials

Radiation Control Program Notices

  • Change to Delaware Radiation Control Regulations, effective August 11, 2015. The following sets of radiation control regulations were published as final rule on August 1, 2015 and went into effect on August 11, 2015:
    • 4465 Part D Standards for Protection Against Radiation - Contains multiple sections, such as Purpose, Scope, Definitions, Implementation, Radiation Protection Programs, Occupational Dose Limits for Adults, Planned Special Exposures, Occupational Dose Limits for Minors, Dose Equivalent to an Embryo/Fetus, Dose Limits for Individual Members of the Public, Surveys & Monitoring, Controlling Access, Storage & Control of Licensed or Registered Radiation Sources, Precautionary Procedures, Records, and Reports. Changes made to be more consonant with other state and federal regulations. Appendix D added – Sample Letter for Declaring Pregnancy. Other appendices remain unchanged from previous version.
    • 4465 part J Notices, Instructions and Reports to Workers - Contains sections titled: Purpose and Scope, General Regulatory Provisions and Specific Requirements, Posting of Notices to Workers, Instructions to Workers, Notifications and Reports to Individuals, Presence of Representatives of Registrants and Workers during Inspection, Consultation with Workers during Inspections, Requests by Workers for Inspections, Inspections Not Warranted; Review. Changes made to be more consonant with other state and federal regulations. Appendices all revised.
  • State Certification Examination Changes January 1, 2016 -
    • The DDRT State Exam will be phased out effective December 31, 2015. Effective January 1, 2016, applicants will apply directly to DANB to take the Radiological Health & Safety Exam (RHS). The DANB RHS exam has been approved by the Authority on Radiation Protection since 2006. For more information:
    • To apply for examination after December 31, 2015, please visit the Dental Assisting National Board.
  • State Examinations Approved by the Authority on Radiation To legally operate x-ray equipment to perform dental and medical radiographic procedures in Delaware, an individual must either hold an approved national credential OR pass a state certification examination approved by the Authority on Radiation Protection (the Authority). Read the full notice.
  • The following sets of radiation control regulations were published as final rule on May 1, 2014 and go into effect on May 11, 2014 - 4465 Part A, 4465 Part B, 4466....
  • Change to Delaware Radiation Control Regulations, effective June 11, 2013...
  • Radiation Protection News Archives

State/Federal Partners

Test Administration

Radiation Emergency Resources

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