WMB Fireworks and explosives Flashcards
The incident commander (IC) should interrogate the MDT looking for
The incident commander (IC) should interrogate the MDT looking for the red warning triangle indicating a Yankee hazard; the IC should consider the possible presence of fireworks
Hazard zones, the following cordons should be set at the following distances
200 Metres for explosives up to 250kg or approximately the size of a small car.
600 Metres for explosives 251kg – 2000kg and military explosive munitions in hazard division 1.2.
1000 metres for explosives over 2000kg.
The IC should restrict the use of radios
The IC should restrict the use of radios within 60m until it has been confirmed that the explosives are not susceptible to detonation from radio transmissions.
Military devices or malicious explosive devices can be detonated by radio transmissions from what distance ?
Military devices or malicious explosive devices can be detonated by radio transmissions from up to 600m and this must be considered when attending this type of incident
Explosives are defined by the Health and Safety Executive (HSE) as any material that is
Explosives are defined by the Health and Safety Executive (HSE) as any material that is capable of undergoing a self-contained and self-sustained exothermic chemical reaction at a rate that is sufficient to produce substantial pressures on their surroundings, thus causing physical damage
There are two types of explosive materials, detonating and deflagrating .These terms describe the rate of the reaction, they are ?
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Detonating explosion is described as when the reaction exceeds the speed of sound.
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Deflagrating explosion below the speed of sound. However, it is not necessarily the material that determines the rate of reaction but other factors such as pressure, heat and confinement which all influence the rate of reaction and the hazard.
Organic peroxides UN class 5.2 are
Organic peroxides UN class 5.2 are far more sensitive and liable to explode than explosives.
Where crews become aware of shops selling and storing fireworks they should
secondly Many fireworks retailers will stock fireworks for short periods in these circumstances the following applies
Where crews become aware of shops selling and storing fireworks they should liaise with the local regulatory fire safety team.
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An entry will be placed on the operational risk data base for all fireworks retailers.
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A re-inspection will be programmed to ensure short term storage of fireworks has been removed
Storage of black powder by gun license holders with ‘Acquire and Keep certificates’ are a significant hazard due to the varying quantities that can be found stored and as such are classified as
Yankee hazard. This information is held on a secure database under the control of the Metropolitan Police Service (MPS) and is entered directly onto the ORD and accessed operationally via the mobile data terminals (MDT).
When explosives have been confirmed involved the IC must select ‘Priority request to talk’ and
inform control “explosives confirmed involved
If the IC has any reason to believe that explosives have been subject to heating or fire
appropriate cordon must be instigated and all personnel and public withdrawn
Explosive material once ignited will self propagate, detonate and this material can not be
extinguished
Maximum storage of fireworks for domestic use for a shop
is 250kg (in an ISO container)
Gun enthusiasts who hold an “acquire and keep certificate” are licensed by the Police to keep up to
up to 20kg of black powder stored in metal boxes
Radios must not be used within
60m
