☣️ UN 3333 • CLASS 7
Radioactive material, Type A package, special form, fissile
Placard: Radioactive. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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.
Advertisement
Quick details
UN 3333
Class: 7
Placard type: Radioactive
ERG: Guide 165 (check current ERG)
Isolation: ERG 165: isolate spill 25m all directions; if package damaged/leaking, isolate 25m and secure area; evacuate immediate area if criticality alarm sounds; no large-scale evacuation needed for intact Type A packages
Chemical & Response Details
| Also known as | Fissile radioactive material Type AType A fissile package special formRAM Type A fissileRadioactive Type A-F package |
| Appearance | Sealed metal or composite container containing fissile radioactive material in special form (non-dispersible solid capsule). Material varies by isotope; package itself is typically metallic with radiation trefoil markings. |
| Flash Point | Not applicable (non-combustible radioactive package) |
| Boiling Point | Not applicable (sealed radioactive material) |
| Vapor Density | Not applicable (solid material in sealed container) |
| Water Reactivity | No significant reaction with water for intact package; damaged packages may expose radioactive material requiring contamination control |
| Extinguishing | Standard fire suppression methods acceptable; water, foam, CO2, dry chemical all appropriate for package fires |
| PPE | ⚠️ Radiation monitoring required; full turnout gear with SCBA for fire; dosimetry badges mandatory; minimize time near packages, maximize distance, use shielding; Level C minimum for damaged packages |
| Isolation | ERG 165: isolate spill 25m all directions; if package damaged/leaking, isolate 25m and secure area; evacuate immediate area if criticality alarm sounds; no large-scale evacuation needed for intact Type A packages |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Radiation presents minimal risk to transport workers, emergency response personnel and the public during
- Undamaged packages are safe. Contents of damaged packages may cause higher external radiation exposure,
- Type AF or IF packages, identified by package markings, do not contain life-threatening amounts of material.
- Type B(U)F, B(M)F and CF packages (identified by markings on packages or shipping papers) contain potentially
- The rarely occurring "Special Arrangement" shipments may be of Type AF, BF or CF packages. Package type
- The transport index (TI) shown on labels or a shipping paper might not indicate the radiation level at one meter
- Some radioactive materials cannot be detected by commonly available instruments.
- Water from cargo fire control is not expected to cause pollution.
First actions (field-minded)
- 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 for
- 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).
Advertisement
📋 Copy & Share
UN 3333 — Radioactive material, Type A package, sp HAZMAT RADIO NOTE — UN 3333
Product: Radioactive material, Type A package, special form, fissile
Class 7 / Radioactive / ERG 165
PPE: Radiation monitoring required; full turnout gear with SCBA for fire; dosimetry badges mandatory; minimize time near packages, maximize distance, use shielding; Level C minimum for damaged packages
ISOLATION: ERG 165: isolate spill 25m all directions; if package damaged/leaking, isolate 25m and secure area; evacuate immediate area if criticality alarm sounds; no large-scale evacuation needed for intact Type A packages
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 3333 — Radioactive material, Type A package, special form, fissile
Class: 7 | Placard: Radioactive | ERG Guide: 165
Appearance: Sealed metal or composite container containing fissile radioactive material in special form (non-dispersible solid capsule). Material varies by isotope; package itself is typically metallic with radiation trefoil markings.
Water Reactivity: No significant reaction with water for intact package; damaged packages may expose radioactive material requiring contamination control
Extinguishing: Standard fire suppression methods acceptable; water, foam, CO2, dry chemical all appropriate for package fires
PPE: Radiation monitoring required; full turnout gear with SCBA for fire; dosimetry badges mandatory; minimize time near packages, maximize distance, use shielding; Level C minimum for damaged packages
Isolation: ERG 165: isolate spill 25m all directions; if package damaged/leaking, isolate 25m and secure area; evacuate immediate area if criticality alarm sounds; no large-scale evacuation needed for intact Type A packages
— Key Hazards —
• Radiation presents minimal risk to transport workers, emergency response personnel and the public during
• Undamaged packages are safe. Contents of damaged packages may cause higher external radiation exposure,
• Type AF or IF packages, identified by package markings, do not contain life-threatening amounts of material.
— 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 for
• 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/3333 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3333 Radioactive material, Type A package, special form, fissile Cls7 ERG165 | allfirefighter.com/hazmat/un/3333SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/3333
Advertisement
FAQ
Radiation presents minimal risk to transport workers, emergency response personnel and the public during Undamaged packages are safe. Contents of damaged packages may cause higher external radiation exposure, Type AF or IF packages, identified by package markings, do not contain life-threatening amounts of material. Type B(U)F, B(M)F and CF packages (identified by markings on packages or shipping papers) contain potentially The rarely occurring "Special Arrangement" shipments may be of Type AF, BF or CF packages. Package type The transport index (TI) shown on labels or a shipping paper might not indicate the radiation level at one meter Some radioactive materials cannot be detected by commonly available instruments. Water from cargo fire control is not expected to cause pollution.
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 for Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for
Radiation monitoring required; full turnout gear with SCBA for fire; dosimetry badges mandatory; minimize time near packages, maximize distance, use shielding; Level C minimum for damaged packages
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 165 and your department SOP/SOG for incident-specific protective actions.
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.