Key points
- The "e" in CBRNe stands for explosive. CBRNe = chemical, biological, radiological, nuclear and explosive.
- Explosives are added because they are the most common way CBRN material is spread in a deliberate attack, and because responders must expect secondary devices.
- The extra letter changes four things: the order of detection, the protective equipment, the sequence of casualty care, and the scope of training.
- "CBRNe" is common in military and police use; civilian emergency services more often say "CBRN". The hazards behind both terms are the same.
The "e" in CBRNe stands for explosive. CBRNe means chemical, biological, radiological, nuclear and explosive. It extends the CBRN framework to include explosives because explosive devices are the most common way chemical or radioactive material is spread in a deliberate attack, and because anyone responding to such an incident must be alert to a second device.
The extra letter is not a formality. It changes the order in which responders act, the equipment they wear, how casualties are treated, and what the training must cover.
CBRN and CBRNe compared
| CBRN | CBRNe | |
|---|---|---|
| Stands for | Chemical, biological, radiological, nuclear | Chemical, biological, radiological, nuclear, explosive |
| Typical incidents | Industrial releases, outbreaks, radiological accidents, deliberate release without a device | Deliberate attacks where an explosive spreads the material, such as a dirty bomb |
| Main term used by | Civilian emergency services, health, industry | Military, police, counter-terrorism |
| Extra hazards | — | Blast, fragments, secondary devices |
| Casualty care | Decontaminate first, then treat | Life-saving trauma care and decontamination in the right order |
Why explosives belong in the model
An explosive device carrying a chemical agent is not a bomb with a chemical side effect; it is a chemical weapon with a blast delivery mechanism. The explosion draws responders towards the blast scene while the chemical release is happening at the same time or just after. Teams that have never trained for combined incidents are exposed to exactly the hazard they are not looking for.
A radiological dispersal device (the "dirty bomb") works the same way. Conventional explosive spreads radioactive material over a wide area. The blast is usually the smaller problem; the contamination is what shapes the response for days or weeks.
What the "e" changes in practice
Detection comes first, and runs in parallel
In a CBRN incident, responders identify the hazard, choose the right detector, confirm and set a cordon. In a CBRNe incident the explosion is the first signal, and the team must decide quickly whether it was the main event or the way a chemical or radiological release was delivered. CBRN detection therefore starts in parallel with the blast response, before anyone advances into the scene, and the area is checked for secondary devices.
Protection has to cover two kinds of hazard
Chemical protective suits do not stop fragments, and body armour does not stop chemical agents. CBRNe operations need layered protection and a clear decision on when each layer is worn. Donning drills and working time are harder than for either hazard alone.
Casualty care needs a sequence
Blast casualties need trauma care immediately. Contaminated casualties normally need decontamination before treatment, to protect medical staff. Casualties with both need a decision on what comes first, based on the agent and the patient's condition. Making that decision under pressure is a skill that has to be practised.
Training scope grows
CBRN training covers detection, protection and decontamination for the four hazard categories. CBRNe training adds recognition of improvised devices, safe distances, secondary-device procedures, coordination with explosive ordnance disposal (EOD) teams, and the casualty sequencing described above.
Which one does your organisation need?
Start from the threat assessment. If your threat picture includes deliberate attacks with improvised devices, as for high-profile government sites, diplomatic missions in higher-threat postings or teams in contested environments, train for CBRNe. If the realistic hazards are industrial releases, natural outbreaks or radiological accidents, CBRN training covers what you need.
Both are delivered through the same four-level CBRN training structure; only the scenarios and emphasis change. The Training Catalogue sets out every programme.
Sources and further reading
- European Commission, protection against terrorist and CBRN threats
- International Atomic Energy Agency, nuclear and radiological emergency preparedness and response
- UNICRI, CBRN risk mitigation and security governance
Frequently Asked Questions
What does the "e" in CBRNe stand for?
The "e" stands for explosive. CBRNe means chemical, biological, radiological, nuclear and explosive, and covers incidents where an explosive device spreads or accompanies hazardous material.
Is CBRNe the same as CBRNE?
Yes. Both spellings mean chemical, biological, radiological, nuclear and explosive. The lower-case "e" is common in Europe and the United Kingdom; the upper-case form is common in the United States.
Do we need CBRNe training if we already train for CBRN?
Only if your threat picture includes deliberate attacks with improvised devices. For accidental releases, industrial chemicals or natural outbreaks, CBRN training covers the requirement. Teams that could face a combined attack need the additional explosive-awareness and casualty-sequencing content.
Is a dirty bomb CBRN or CBRNe?
Both. A radiological dispersal device ("dirty bomb") uses conventional explosive to spread radioactive material, so it is a radiological hazard delivered by explosive — the textbook CBRNe case.