☣️ UN 3328 • CLASS 7
UN 3328 — Radioactive material, Type B(U) package, fissile
Placard: Radioactive. ERG Guide 165. 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 3328 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 3328 Quick Details
UN 3328
Product name: Radioactive material, Type B(U) package, fissile
DOT Class: 7
Placard type: Radioactive
ERG Guide: 165 (check current ERG)
Initial isolation: ERG 165: isolate 25m all directions initially; damaged packages isolate 80m and evacuate 400m downwind; secure package and call radiation authority immediately
Common Hazards of UN 3328
- 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.
Chemical Identity & Physical Properties
Packaged fissile radioactive material in Type B(U) containers designed for high-activity sources. Physical form varies (solid, liquid, or special form) depending on specific isotope and application.
| Also known as | Type B(U) fissile packageFissile radioactive material Type BUN3328 radioactive package |
| Appearance | Packaged fissile radioactive material in Type B(U) containers designed for high-activity sources. Physical form varies (solid, liquid, or special form) depending on specific isotope and application. |
| Flash Point | Not applicable (radioactive material) |
| Boiling Point | Not applicable (varies by isotope and form) |
| Vapor Density | Not applicable (packaged material) |
| Water Reactivity | Depends on specific isotope and chemical form; undamaged packages designed to prevent water contact |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3328
Extinguishing Media
Do not use foam; radiation cannot be extinguished, fight surrounding fire only with appropriate extinguishing agent
PPE Requirements
⚠️ Full protective clothing with respiratory protection; dosimetry required; minimize exposure time and maximize distance; consult radiation safety officer
Full protective clothing with respiratory protection; dosimetry required; minimize exposure time and maximize distance; consult radiation safety officer
Isolation & Evacuation
ERG 165: isolate 25m all directions initially; damaged packages isolate 80m and evacuate 400m downwind; secure package and call radiation authority immediately
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 165).
First Actions for a UN 3328 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 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).
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📋 Copy & Share Field Card
UN 3328 — Radioactive material, Type B(U) package,HAZMAT RADIO NOTE — UN 3328
Product: Radioactive material, Type B(U) package, fissile
Class 7 / Radioactive / ERG 165
PPE: Full protective clothing with respiratory protection; dosimetry required; minimize exposure time and maximize distance; consult radiation safety officer
ISOLATION: ERG 165: isolate 25m all directions initially; damaged packages isolate 80m and evacuate 400m downwind; secure package and call radiation authority immediately
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 3328 — Radioactive material, Type B(U) package, fissile
Class: 7 | Placard: Radioactive | ERG Guide: 165
Appearance: Packaged fissile radioactive material in Type B(U) containers designed for high-activity sources. Physical form varies (solid, liquid, or special form) depending on specific isotope and application.
Water Reactivity: Depends on specific isotope and chemical form; undamaged packages designed to prevent water contact
Extinguishing: Do not use foam; radiation cannot be extinguished, fight surrounding fire only with appropriate extinguishing agent
PPE: Full protective clothing with respiratory protection; dosimetry required; minimize exposure time and maximize distance; consult radiation safety officer
Isolation: ERG 165: isolate 25m all directions initially; damaged packages isolate 80m and evacuate 400m downwind; secure package and call radiation authority immediately
— 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/radioactive-material-type-b-un-3328 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3328 Radioactive material, Type B(U) package, fissile Cls7 ERG165 | allfirefighter.com/hazmat/un/radioactive-material-type-b-un-3328SMS / 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-type-b-un-3328
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Frequently Asked Questions about UN 3328
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.