CBRN / HazMat Training Blog

Improving initial operational response to CBRNe incidents

Written by Steven Pike on 09 July 2019

initial-operational-response-cbrneThe deliberate release of chemical warfare agents (CWAs) or toxic materials in civilian settings represents a serious threat - not only to the individuals within those communities, but to the personnel charged with the initial response, specialist incident management and medical care.

The discovery of the use of the 'novichok' nerve agent in Salisbury UK in March 2018, for example, was a stark reminder of how vulnerable the wider civilian population can be to the effects of targeted and pernicious CBRNe activities.

And with the deployment of chemical warfare agents no being longer restricted to the domain of war zones or politically unstable regions, the provision of thorough first responder training together with robust detection/protection capability is even more crucial.

Managing CBRNe incidents in civilian settings

Over the last decade and a half, the UK has continued to develop its counter-terrorism strategy (CONTEST), with the aim of reducing, preparing for and responding to, any potential risk of terrorist activity to the UK and its citizens.

Central to the strategy of CONTEST has been the evaluation, development and optimisation of the 'Model Response' - the set of operational parameters that guides the handling of CBRNe and HazMat incidents.

Initial emergency response

Historically, the Model Response procedure has advised that initial emergency responders that are called to a suspected CBRNe contamination incident 'stand off' and await the arrival of specially trained teams that have the requisite protection and detection capabilities to manage CBRNe events.

One of the recognised shortcomings of the Model Response however has been that it is dependent on the speed with which those specialist (or strategic) operational response (SOR) assets can be dispatched to the scene.

The earliest stages of an incident can often be the most critical in terms of saving lives - as even the briefest of delays can have serious health consequences for those individuals who have been exposed to chemical contamination.

Chemical contamination

The effectiveness of casualty management is especially important when it comes to the handling of incidents involving nerve agents or hydrogen cyanide for example, where the effects of the release come on much more rapidly and with greater severity.

In 2008, a series of UK-based research trials - known as the Optimisation through Research of Chemical Incident Decontamination Systems (ORCHIDS) - were commissioned.

A core aim of the ORCHIDS project was to find ways to improve casualty care and to enhance the rapidity of initial response to a CBRNe incident, whilst at the same time avoiding unnecessary risk to the first (non-specialist) responders.

The trials resulted in a number of evidence-based recommendations on how emergency teams could look to modify their response to best manage the earliest phases of a mass CBRNe or HazMat event.

The IOR protocol

One of the key outcomes was the implementation of an Initial Operational Response (IOR) protocol which precedes, and supports, the Specialist Operational Response (SOR) at the scene of a contamination incident.

The focus of the IOR is to save as many lives as possible by facilitating early and effective intervention until such time as specialist resources are able to arrive on the scene.

  • A first priority is to move casualties away from the source of contamination (and ideally to an area uphill and upwind of the incident.)
  • First responders must meanwhile also ensure their own safety by conducting ongoing hazard assessments.
  • Clear communication with both casualties and bystanders is crucial in fostering trust and encouraging compliance.
  • The disrobing of casualties (preferably undertaken by the casualties themselves) is known to be highly effective at reducing the effects of chemical exposure - which is then immediately followed by improvised decontamination.
  • In cases where a non-caustic chemical agent is suspected then DRY decontamination (the use of absorbent material to blot or rub the skin surface) is always recommended in the first instance.
  • WET decontamination is only recommended where there are signs or symptoms of a caustic chemical substance.


In the UK, terrorist incidents that involve CBRNe agents are still thankfully rare.

But in the event of a contamination incident, the rapidity of response is critical.

A central feature of the new IOR process is that it means that response teams are able to save lives by commencing the emergency disrobing and decontamination of affected casualties as soon as they arrive on the scene, rather than having to 'stand down' and await the arrival of specialist assets.

A guide to effective chemical warfare agent training eBook

Topics: CBRNe Training

Steven Pike

Written by Steven Pike

Steven Pike is the Founder and Managing Director of Argon Electronics (UK) Ltd. A graduate of the University of Hertfordshire, Steven has been awarded a number of international patents relating to the field of hazardous material training systems and technology.