☣️ UN 3322 • CLASS 7
UN 3322 — Radioactive material, low specific activity (LSA-III), non fissile or fissile-excepted
Placard: Radioactive. ERG Guide 162. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
UN 3322 is a Class 7 radioactive material entry. The main response priorities are life safety, package integrity, contamination control, radiation monitoring, and early notification of the radiation authority.
Hazard overview: Undamaged packages generally present low risk, but damaged packages or released contents may create external radiation or contamination hazards. Some radioactive materials may not be detectable with basic instruments.
Response guidance: Do not touch damaged packages or spilled material. Isolate the area, keep people upwind and away, use radiation survey instruments and dosimetry when available, and follow radiation authority direction.
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UN 3322 Quick Details
UN 3322
Product name: Radioactive material, low specific activity (LSA-III), non fissile or fissile-excepted
DOT Class: 7
Placard type: Radioactive
ERG Guide: 162 (check current ERG)
Initial isolation: ERG 162: isolate 25m minimum initially; damaged packages isolate 100m and evacuate 100m downwind; monitor radiation levels with survey meters; establish hot zone based on dose rates
Common Hazards of UN 3322
- Radiation presents minimal risk to transport workers, emergency response personnel and the public
- Undamaged packages are safe. Contents of damaged packages may cause higher external radiation
- Low radiation hazard when material is inside container. If material is released from package or bulk
- Some material may be released from packages during accidents of moderate severity but risks to people
- Released radioactive materials or contaminated objects usually will be visible if packaging fails.
- Some exclusive use shipments of bulk and packaged materials will not have RADIOACTIVE labels.
- Some packages may have a RADIOACTIVE label and a second hazard label. The second hazard is usually
- Some radioactive materials cannot be detected by commonly available instruments.
Chemical Identity & Physical Properties
Variable physical form including solids, powders, or solidified materials with low radiation levels. Material typically contained in Type IP-2, IP-3, or industrial packaging. LSA-III materials have activity concentrations not exceeding specified limits for transport.
| Also known as | LSA-III radioactive materialLow specific activity material type IIINon-fissile radioactive materialLSA-III radwasteExempt fissile radioactive cargo |
| Appearance | Variable physical form including solids, powders, or solidified materials with low radiation levels. Material typically contained in Type IP-2, IP-3, or industrial packaging. LSA-III materials have activity concentrations not exceeding specified limits for transport. |
| Flash Point | Not applicable (radioactive classification, not flammability-based) |
| Boiling Point | Not applicable (varies by specific radioactive material form) |
| Vapor Density | Not applicable (typically solid materials, radioactive property) |
| Water Reactivity | Generally no significant water reactivity; primary hazard is radiation exposure, not chemical reaction |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3322
Extinguishing Media
Water spray, foam acceptable for fire control; radiation is primary concern, not fire chemistry
PPE Requirements
⚠️ Level C minimum with dosimetry; full protective clothing to prevent contamination; SCBA if package damaged or fire conditions; minimize time, maximize distance, use shielding
Level C minimum with dosimetry; full protective clothing to prevent contamination; SCBA if package damaged or fire conditions; minimize time, maximize distance, use shielding
Isolation & Evacuation
ERG 162: isolate 25m minimum initially; damaged packages isolate 100m and evacuate 100m downwind; monitor radiation levels with survey meters; establish hot zone based on dose rates
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 162).
First Actions for a UN 3322 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not
- Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the priority
- Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for
- Stay upwind, uphill and/or upstream.
- Keep unauthorized personnel away.
- Detain or isolate uninjured persons or equipment suspected to be contaminated; delay decontamination and
- Isolate spill or leak area for at least 25 meters (75 feet) in all directions.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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📋 Copy & Share Field Card
UN 3322 — Radioactive material, low specific activHAZMAT RADIO NOTE — UN 3322
Product: Radioactive material, low specific activity (LSA-III), non fissile or fissile-excepted
Class 7 / Radioactive / ERG 162
PPE: Level C minimum with dosimetry; full protective clothing to prevent contamination; SCBA if package damaged or fire conditions; minimize time, maximize distance, use shielding
ISOLATION: ERG 162: isolate 25m minimum initially; damaged packages isolate 100m and evacuate 100m downwind; monitor radiation levels with survey meters; establish hot zone based on dose rates
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3322 — Radioactive material, low specific activity (LSA-III), non fissile or fissile-excepted
Class: 7 | Placard: Radioactive | ERG Guide: 162
Appearance: Variable physical form including solids, powders, or solidified materials with low radiation levels. Material typically contained in Type IP-2, IP-3, or industrial packaging. LSA-III materials have activity concentrations not exceeding specified limits for transport.
Water Reactivity: Generally no significant water reactivity; primary hazard is radiation exposure, not chemical reaction
Extinguishing: Water spray, foam acceptable for fire control; radiation is primary concern, not fire chemistry
PPE: Level C minimum with dosimetry; full protective clothing to prevent contamination; SCBA if package damaged or fire conditions; minimize time, maximize distance, use shielding
Isolation: ERG 162: isolate 25m minimum initially; damaged packages isolate 100m and evacuate 100m downwind; monitor radiation levels with survey meters; establish hot zone based on dose rates
— Key Hazards —
• Radiation presents minimal risk to transport workers, emergency response personnel and the public
• Undamaged packages are safe. Contents of damaged packages may cause higher external radiation
• Low radiation hazard when material is inside container. If material is released from package or bulk
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not
• Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the priority
• Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for
• Stay upwind, uphill and/or upstream.
SOURCE: allfirefighter.com/hazmat/un/radioactive-material-low-specific-un-3322 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3322 Radioactive material, low specific activity (LSA-III), non fissile or fissile-excepted Cls7 ERG162 | allfirefighter.com/hazmat/un/radioactive-material-low-specific-un-3322SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/radioactive-material-low-specific-un-3322
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Frequently Asked Questions about UN 3322
Yes. It is a Class 7 radioactive material entry.
Undamaged packages normally present low external risk, but labels and radiation readings should still be checked.
Isolate the area, avoid contact, monitor radiation if equipped, and notify the radiation authority.
Use protective clothing to prevent contamination, respiratory protection if airborne contamination is possible, and dosimetry for responders.
Minimize time, maximize distance, and use shielding whenever practical.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.