Shipping Radioactive Material: A DOT 49 CFR Compliance Guide

Introduction

Shipping and receiving radioactive material is regulated primarily by the U.S. Department of Transportation under 49 CFR Parts 171–173, with the Class 7 (radioactive) requirements concentrated in 49 CFR Part 173, Subpart I, sections 173.401 through 173.477. For NRC and Agreement State licensees, packaging and transport also fall under 10 CFR Part 71, and any air shipment must additionally satisfy the IATA Dangerous Goods Regulations, which implement the ICAO Technical Instructions. Internationally, the governing framework is IAEA SSR-6, the Regulations for the Safe Transport of Radioactive Material, which the U.S. rules are harmonized with. ¹²³⁶

For a nuclear medicine department, PET center, or radiopharmaceutical therapy program, transport compliance is not an abstract logistics topic — it is a daily operational reality. Unit doses arrive from a commercial radiopharmacy, generators ship in and out, sealed sources are returned to the manufacturer, and radioactive waste leaves the building. Each of those movements is a regulated shipment with specific package, labeling, marking, paperwork, training, and survey obligations. Getting any one of them wrong is among the more common findings in NRC and DOT inspections. ⁴⁵

This guide walks through the regulatory framework, the package types and when each applies, how the White-I / Yellow-II / Yellow-III label categories and the Transport Index are determined, the surface dose-rate and removable-contamination limits, the marking and shipping-paper requirements, hazmat employee training, and the receiving survey tied to 10 CFR 20.1906. DRPS supports facilities with these programs as part of its radioactive material license support and radiation safety officer consulting across Florida, Maryland, Virginia, Washington DC, California, and Nevada.

Topic Explanation

What is "transport of radioactive material" in the regulatory sense?

In regulatory terms, "transport" begins the moment a package of radioactive material is offered to a carrier and ends when it is accepted by the consignee. Everything in between — the package design, the contents limits, the surface dose rate, the contamination on the outside of the package, the labels, the markings, the placards on the vehicle, the shipping papers, and the emergency response information — is specified so that the public, transport workers, and emergency responders are protected without needing to know the details of what is inside.

The U.S. system divides responsibility between two principal agencies:

• DOT (49 CFR) writes the transport rules for all hazardous materials, including Class 7 (radioactive material). These rules govern hazard communication (labels, markings, placards, papers), package performance for excepted/industrial/Type A packages, activity limits, contamination limits, training, and emergency response information. ¹²
• NRC (10 CFR Part 71) governs the packaging and transport of licensed radioactive material, and is the agency that reviews and approves Type B and fissile package designs (issuing the Certificate of Compliance referenced by the package's identification number). NRC rules cross-reference and incorporate the DOT requirements; the NRC's NUREG-1660 consolidates the U.S.-specific schedules of transport requirements that bridge the DOT and NRC rule sets. ³⁸

For air transport, the IATA Dangerous Goods Regulations (DGR) apply. IATA is the airline-industry implementation of the ICAO Technical Instructions and is generally more restrictive than the ground rules — for example, excepted packages and many Type A air shipments carry tighter handling and documentation expectations, and certain materials are forbidden by passenger aircraft. ⁶

Why this matters for medical facilities

A diagnostic or therapeutic nuclear medicine program touches transport regulations constantly:

• Receiving Tc-99m generators, F-18 FDG unit doses, I-131 capsules, Lu-177 and Ra-223 therapy doses.
• Returning expended generators or sealed sources to the manufacturer.
• Shipping radioactive waste for decay-in-storage or disposal.
• Transferring sources between licensed facilities.

Each of these is a shipment, a receipt, or both. The facility's Radiation Safety Officer (RSO) owns the receiving survey and the contamination-control program; whoever offers material for shipment becomes a regulated hazmat employee. Connecting these duties to the broader program — radioactive material license support, waste handling, and package receipt and wipe testing — is what keeps a department inspection-ready.

Key Technical Principles

Package types and when each applies

The DOT/IAEA framework defines a graded series of package types whose required robustness scales with the hazard of the contents. The activity limits A1 (for special form, essentially non-dispersible sealed material) and A2 (for normal form) are tabulated by radionuclide in 49 CFR 173.435. ²

In day-to-day nuclear medicine, the workhorse is the Type A package — the cardboard-and-lead-pig container a unit dose arrives in. Therapy quantities of certain radionuclides, or large sealed sources, can exceed the A2 limit and require Type B packaging with an NRC-approved design. (The "U" in B(U) denotes unilateral approval by the country of origin; "M" denotes multilateral approval.)

Label categories and the Transport Index

Once the package is built and loaded, two measured quantities determine the label category: the maximum radiation dose rate at the package surface, and the Transport Index (TI). The TI is defined as the maximum dose rate at 1 meter from the package surface, expressed in mrem/h — equivalently, the dose rate in mSv/h multiplied by 100:

The label is set by whichever criterion — surface dose rate or TI — drives the higher category. The three radioactive-material labels and their criteria (49 CFR 172.403, 172.436–172.440) are: ¹

Note: A package with TI > 10, or a surface dose rate > 2 mSv/h (up to the 10 mSv/h ceiling for exclusive-use shipments), must carry a Yellow-III label and be shipped under exclusive use (49 CFR 173.441(b), 172.403).

A few practical rules follow from this table:

• For a package in non-exclusive-use transport, the limits are ≤ 2 mSv/h (200 mrem/h) at the surface and a transport index ≤ 10 — equivalently a dose rate ≤ 0.1 mSv/h (10 mrem/h) at 1 meter, since the TI is just the 1-meter dose rate expressed in mrem/h (49 CFR 173.441(a)). Exceeding either requires exclusive use, under which the surface dose rate may go up to 10 mSv/h but the dose rate ≤ 0.1 mSv/h (10 mrem/h) at 2 m from the vehicle's outer lateral surfaces must still be met (49 CFR 173.441(b)). ²
• A package whose TI exceeds 1 must carry a Yellow-III label even if its surface reading would otherwise be Yellow-II — and vice versa, a high surface reading forces Yellow-III even at a modest TI. Always take the more restrictive category.
• Both Yellow-II and Yellow-III labels must show the contents (radionuclide) and activity, and the TI value. White-I labels do not require a TI entry.

Worked example: determining the label category

Consider a Type A unit-dose package for a therapy administration. A survey gives a maximum dose rate of 0.42 mSv/h at the package surface and 0.011 mSv/h at 1 meter. First compute the Transport Index:

Now apply both criteria:

• Surface dose rate = 0.42 mSv/h → falls in the Yellow-II band (> 0.005 and ≤ 0.5 mSv/h).
• TI = 1.1 → exceeds 1, which forces Yellow-III.

Because the category is set by whichever criterion is more restrictive, this package must carry a Radioactive Yellow-III label with a Transport Index of 1.1 entered on the label. Rounding convention: the TI is rounded up to the first decimal place (a measured 1.02 is recorded as 1.1) per the transport-index definition in 49 CFR 173.403.

Mixed nuclides and the A2 fraction sum

When a single package contains a mixture of radionuclides (common in waste shipments), the Type A activity limit is not a single A2 value but a sum-of-fractions test. For normal-form material, the package qualifies as Type A only if the sum of each nuclide's activity divided by its own A2 value does not exceed 1:

where $A_i$ is the activity of radionuclide $i$ in the package and $A_2(i)$ is its A2 value from 49 CFR 173.435. (For special-form contents, substitute A1.) If the sum exceeds 1, the contents exceed Type A limits and a Type B package is required. This same fraction-sum logic, in slightly different form, also governs the determination of contamination and exemption thresholds. ²

Removable (non-fixed) contamination limits

The outside of every package must be essentially free of removable contamination. Under 49 CFR 173.443, averaged over any 300 cm² of surface, the non-fixed contamination must not exceed: ²

These are the same numerical limits that drive the incoming wipe (smear) survey on receipt. A wipe over ~300 cm², counted on a calibrated instrument and corrected for efficiency and geometry, is compared against these thresholds. Our companion guide on package receipt and wipe testing covers the counting and documentation mechanics in detail.

Clinical Impact

What the receiving department actually does

For most medical facilities, the receiving side is where transport rules meet daily practice. When a labeled package of radioactive material arrives, the licensee must, under 10 CFR 20.1906: ⁴

• Monitor the external surface for radiation dose rate, and wipe-test for removable contamination on packages labeled Radioactive White-I, Yellow-II, or Yellow-III (a surface monitor reading plus a smear).
• Perform this monitoring as soon as practical after receipt, but no later than 3 hours after the package is received if it arrives during normal working hours — or within 3 hours of the beginning of the next workday if received after working hours. ⁴
• Exceptions to the removable-contamination check: packages containing only radioactive gas or special-form material are excepted from the wipe-test for removable contamination (unless the package shows evidence of degradation, such as wetness or a damaged seal). The external dose-rate monitoring still applies.
• Notify the final delivery carrier and the NRC (by telephone, with written follow-up) if the removable surface contamination exceeds the 10 CFR 71.87(i) limits (the 4 / 0.4 Bq/cm² values, the same numbers found in 49 CFR 173.443) or if the external radiation levels exceed the 10 CFR 71.47 limits (the surface dose-rate and transport-index limits for the package). ⁴
• Establish written procedures for safe opening of packages and for the monitoring described above.

The receiving survey is one of the most frequently cited topics in inspections, usually for missing documentation, missing wipe tests, or surveys not performed within the time window. Pairing a reliable survey meter with a documented procedure is the single most effective control here.

What the shipping department must get right

When the facility offers material for transport — returning a generator, shipping waste, transferring a source — it becomes the shipper and inherits the full hazard-communication burden:

• Selecting the correct package type for the activity and form.
• Surveying the package and assigning the correct label category and TI.
• Verifying removable contamination is below limits before release.
• Applying markings: proper shipping name (e.g., "Radioactive material, Type A package"), UN identification number, consignor/consignee, and package marking.
• Preparing shipping papers (the hazardous materials description, including class 7, UN number, activity, physical/chemical form, and category) and emergency response information.
• Ensuring the transport vehicle is placarded when required (RADIOACTIVE placard for any Yellow-III package or exclusive-use shipments — see Regulatory Considerations).

A single mislabeled or undocumented outbound shipment can generate findings under both the NRC license and DOT, so the shipping checklist deserves the same rigor as the receiving survey.

Practical Optimization Tips

Build a standardized shipping/receiving workflow

1. Designate and train hazmat employees. Anyone who classifies, packages, marks, labels, prepares papers for, or offers radioactive material must be a trained hazmat employee (see Regulatory Considerations). Keep the training records current.
2. Standardize the receiving survey. A one-page form: time received, time surveyed, surveyor, instrument and calibration date, surface dose rate, dose rate at 1 m, wipe result (with efficiency and MDA), package label/TI, disposition. This directly satisfies 10 CFR 20.1906 documentation.
3. Verify the package against the shipping papers. Confirm the radionuclide, activity, package type, label category, and TI on the label match the paperwork before accepting or releasing.
4. Pre-stage emergency response information. The 24-hour emergency response phone number and basic response guidance must accompany every shipment.
5. Survey before release, not just on receipt. For outbound shipments, the same dose-rate and contamination checks set the label and confirm compliance.

Common pitfalls to avoid

• Skipping the wipe test on receipt. A surface dose-rate reading alone does not satisfy 10 CFR 20.1906; most labeled packages also need a removable-contamination wipe.
• Missing the 3-hour survey window. The clock starts at receipt (or the next working day). Late surveys are a recurring citation.
• Assigning the label from surface dose rate only. The TI can force a higher category — always evaluate both criteria and take the more restrictive.
• Letting hazmat training lapse. Recurrent training is required at least every 3 years; a lapsed record makes every subsequent shipment non-compliant.
• Treating "empty" packaging as exempt without checking. Empty packaging can still carry residual contamination and specific marking rules.
• Confusing Type A activity limits. A2 (normal form) vs A1 (special form) values differ; using the wrong one can wrongly place a shipment in or out of Type A.
• Forgetting the placard. Yellow-III and exclusive-use shipments trigger vehicle placarding requirements that the shipper must communicate.

Coordinate with your radiopharmacy and carrier

Most inbound doses arrive pre-labeled and surveyed by the commercial radiopharmacy, but the receiving licensee is still responsible for the receipt survey and documentation. Establish a clear hand-off: who surveys, where the form lives, and how an exceedance is escalated to the carrier and NRC.

Regulatory Considerations

Transport of radioactive material sits at the intersection of DOT hazardous-materials rules, NRC (or Agreement State) materials licensing, and — for air — IATA/ICAO requirements. A defensible program documents which framework applies to each movement and keeps training, surveys, and paperwork current.

Key frameworks to reference:

• 49 CFR Part 172 — Hazardous Materials Table, special provisions, labeling (172.403), marking, placarding, shipping papers, emergency response information, and hazmat employee training (Subpart H, 172.700–172.704). Training comprises general awareness, function-specific, safety, and security-awareness components, with recurrent training at least once every three years (49 CFR 172.704(c)(2)). ¹
• 49 CFR Part 173, Subpart I (173.401–173.477) — Class 7 definitions and requirements: 173.403 (definitions, including Transport Index, A1, A2, special/normal form), 173.435 (A1/A2 activity table by radionuclide), 173.441 (radiation-level limits for packages and conveyances), 173.443 (contamination control limits), and the excepted/industrial/Type A/Type B package provisions. ²
• 10 CFR Part 71 — NRC packaging and transportation rules, including the hypothetical accident conditions (71.73) that Type B designs must withstand and the Certificate of Compliance process for approved package designs. ³
• 10 CFR 20.1906 — receiving licensee's package monitoring and survey obligations, including the 3-hour window and notification thresholds. ⁴
• IATA Dangerous Goods Regulations / ICAO Technical Instructions — air-transport requirements, generally more restrictive than ground rules, with their own packing instructions, documentation, and operator-acceptance steps. ⁶
• IAEA SSR-6 — the international Regulations for the Safe Transport of Radioactive Material, the basis with which the U.S. and IATA rules are harmonized. ⁷
• 10 CFR Part 37 — physical-protection and security requirements for Category 1 and Category 2 quantities of radioactive material; high-activity sealed sources (e.g., certain Cs-137 or Co-60 therapy/irradiator sources) shipped or returned can fall into these categories, adding security, advance-notification, and chain-of-custody obligations on top of the DOT transport rules. ¹⁰

Jurisdiction note. Radioactive material (byproduct material) is regulated by the NRC or an Agreement State, while the DOT transport rules apply nationwide regardless of which agency licenses the material. Of the states DRPS serves, Florida, Maryland, Virginia, California, and Nevada are Agreement States administering their own radiation-control programs, while Washington, DC is regulated directly by the NRC. The DOT 49 CFR transport requirements apply uniformly across all of them. For the broader compliance picture, see our guides to common radiation safety violations and how to avoid them and preparing for an NRC inspection.

For facilities building or expanding a program, the transport piece should be coordinated with the license, the radiation safety officer program, waste management, and staff training so that receiving surveys, shipping papers, and hazmat training all align with 10 CFR Part 20, 49 CFR, and the applicable NRC or state requirements. ³⁴

Frequently Asked Questions (FAQs)

What regulations govern shipping radioactive material in the United States?

Ground transport of radioactive material is governed by the U.S. Department of Transportation under 49 CFR Parts 171–173, with Class 7 (radioactive) requirements concentrated in 49 CFR Part 173, Subpart I. The NRC's 10 CFR Part 71 governs packaging and transportation for its licensees and approves Type B and fissile package designs. Air shipments must also meet the IATA Dangerous Goods Regulations, which implement the ICAO Technical Instructions.

What is the Transport Index on a radioactive package?

The Transport Index (TI) is the maximum radiation dose rate at 1 meter from the package surface, expressed in millirem per hour (the dose rate in mSv/h multiplied by 100). The TI controls the label category and limits how many packages can be grouped together to manage external exposure during transport.

What is the difference between a Yellow-II and Yellow-III label?

A Radioactive Yellow-II label is required when the maximum surface dose rate is greater than 0.005 mSv/h (0.5 mrem/h) but not more than 0.5 mSv/h, and the Transport Index is greater than 0 but not more than 1. A Yellow-III label is required when the surface dose rate exceeds 0.5 mSv/h up to the 2 mSv/h limit, or when the Transport Index exceeds 1. The higher of the two criteria — surface dose rate or TI — determines the category.

What is the removable contamination limit for a radioactive package?

Under 49 CFR 173.443, non-fixed (removable) external contamination on a package must not exceed 4 becquerels per square centimeter (about 1E-4 µCi/cm²) for beta, gamma, and low-toxicity alpha emitters, or 0.4 Bq/cm² for all other alpha emitters, averaged over 300 cm². These limits are checked by a wipe (smear) survey.

What is the difference between a Type A and Type B package?

A Type A package is designed to retain its contents under normal transport conditions and is limited to the A1 (special form) or A2 (normal form) activity values in 49 CFR 173.435 for each radionuclide. A Type B package is required for activities exceeding A1/A2 and must survive defined accident (hypothetical) test conditions; Type B designs are approved by the NRC under 10 CFR Part 71 (or competent authority).

Do nuclear medicine staff who receive radioactive packages need hazmat training?

Anyone who prepares, offers, labels, or ships radioactive material is a hazmat employee and must be trained under 49 CFR Part 172, Subpart H, with recurrent training at least once every three years. Staff who only receive and survey incoming packages generally are not shippers, but they must follow the receiving and survey procedures in 10 CFR 20.1906 and the facility's radiation safety program.

What survey is required when a radioactive package arrives?

Under 10 CFR 20.1906, licensees must monitor external surfaces of labeled packages for radiation levels (and wipe-test for removable contamination on most packages) as soon as practicable after receipt — generally within 3 hours if received during working hours, or within 3 hours of the next working day if received afterward. The licensee must notify the final delivery carrier and the NRC if contamination or dose-rate limits are exceeded.

Key Takeaways

• DOT 49 CFR is the master transport framework. Class 7 (radioactive) requirements live in 49 CFR Part 173, Subpart I (173.401–173.477); NRC 10 CFR Part 71 governs packaging and approves Type B designs; IATA DGR governs air shipments.
• Package type scales with the hazard. Excepted → Industrial (IP) → Type A (limited to A1/A2 from 173.435) → Type B (for activity above A1/A2, accident-resistant).
• Two criteria set the label. The maximum surface dose rate and the Transport Index (TI = dose rate at 1 m in mSv/h × 100) jointly determine White-I, Yellow-II, or Yellow-III; always take the more restrictive.
• Know the hard limits. Non-exclusive-use transport caps the surface dose rate at 2 mSv/h and the transport index at 10 — equivalently ≤ 0.1 mSv/h at 1 meter (173.441(a)); higher dose rates require exclusive use. Removable contamination caps at 4 Bq/cm² (beta/gamma/low-tox alpha) and 0.4 Bq/cm² (other alpha) per 173.443.
• Train your shippers. Hazmat employees need 49 CFR 172 Subpart H training with recurrent training at least every 3 years.
• Survey every incoming package. 10 CFR 20.1906 requires a dose-rate and (for most labeled packages) removable-contamination survey, generally within 3 hours, with carrier/NRC notification on exceedance.

Conclusion

Transport compliance is a recurring, every-shipment discipline, not a one-time setup. A nuclear medicine or radiopharmaceutical therapy program receives and ships radioactive material continuously, and each movement is governed by the DOT 49 CFR Class 7 rules, layered with NRC 10 CFR Part 71 for packaging and 10 CFR 20.1906 for receiving — and IATA for anything that flies.

The RSO and medical physicist should treat the shipping checklist and the receiving survey with equal rigor: correct package type, correct label and Transport Index, contamination below limits, complete shipping papers and emergency response information, current hazmat training, and a documented receipt survey within the required window. Facilities that standardize and document these steps are far better positioned to protect workers and the public — and to defend the program during an NRC or DOT inspection.

How DRPS Can Help

Diagnostic Radiation Physics Services helps imaging, nuclear medicine, and radiopharmaceutical therapy facilities turn transport regulations into practical, documented workflows. This can include receiving-survey procedure development tied to 10 CFR 20.1906, package-label and Transport-Index verification, contamination-control and wipe-test programs, hazmat employee training support, shipping-paper and emergency-response documentation review, and radioactive material license support and RSO program guidance aligned with NRC, Agreement State, and DOT requirements.

DRPS supports facilities across our service locations, including Florida, Maryland, Virginia, Washington DC, California, and Nevada. A strong transport program is not just about passing an inspection — it is about making the compliant process the routine process for the clinical team.

Related Resources

• Package receipt and wipe testing
• Radioactive waste management in nuclear medicine
• NRC materials license guide
• Common radiation safety violations
• Preparing for an NRC inspection
• Choosing the right radiation survey meter
• Radioactive material license support
• Radiation Safety Officer consulting

References

1. U.S. Department of Transportation. 49 CFR Part 172 — Hazardous Materials Table, Special Provisions, Hazardous Materials Communications, Emergency Response Information, Training Requirements, and Security Plans (incl. 172.403 labeling and Subpart H training). ecfr.gov
2. U.S. Department of Transportation. 49 CFR Part 173, Subpart I — Class 7 (Radioactive) Materials (incl. 173.403 definitions, 173.435 A1/A2 table, 173.441 radiation level limits, 173.443 contamination control). ecfr.gov
3. U.S. Nuclear Regulatory Commission. 10 CFR Part 71 — Packaging and Transportation of Radioactive Material. ecfr.gov
4. U.S. Nuclear Regulatory Commission. 10 CFR 20.1906 — Procedures for receiving and opening packages. ecfr.gov
5. U.S. Nuclear Regulatory Commission. NUREG-1556, Volume 9, Revision 3: Consolidated Guidance About Materials Licenses — Program-Specific Guidance About Medical Use Licenses. nrc.gov
6. International Air Transport Association. Dangerous Goods Regulations (DGR) — implementing the ICAO Technical Instructions for the Safe Transport of Dangerous Goods by Air. iata.org
7. International Atomic Energy Agency. Regulations for the Safe Transport of Radioactive Material, 2018 Edition. IAEA Safety Standards Series No. SSR-6 (Rev. 1). Vienna: IAEA; 2018. iaea.org
8. U.S. Nuclear Regulatory Commission. NUREG-1660, Revision 1: U.S. Specific Schedules of Requirements for Transport of Specified Types of Radioactive Material Consignments. nrc.gov
9. U.S. Nuclear Regulatory Commission. 10 CFR Part 20 — Standards for Protection Against Radiation. ecfr.gov
10. U.S. Nuclear Regulatory Commission. 10 CFR Part 37 — Physical Protection of Category 1 and Category 2 Quantities of Radioactive Material. ecfr.gov