Chapter 4: Chemical & Radiation Event

TYPES OF EMERGENCY

Radiation Emergencies

Occupational accidents

Radiology exposure device

Definition: Radioactive material could be hidden from sight to expose people to radiation without their knowledge.

Example: Medical diagnosis, Cancer treatment, Industrial radiography, Sterilization of medical product

The dangers of a Radiological Exposure Device depend on:
a) The type and amount of radioactive material
b) How long were people near the device
c) What parts of their body were exposed

What should I do to protect myself:


-Report a suspected Radiological Exposure Device to law enforcement officials immediately.
-Stay as far away from the suspected RED as possible.
-If a RED is identified, and you believe you have been exposed, listen for instructions from emergency officials and contact your doctor.

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Workplaces like healthcare facilities, research institutions, and various manufacturing operations use radiation sources. An accident is caused due to improper use of radiation, or if there are malfunctions of safety controls, accidents can happen.

Occupational accidents involving radiation can affect health based on several factors:
a) The type and amount of radioactive material
b) How long people were near the radioactive material or how long the radioactive material was in or on the body
c) How close people were to the radioactive material
d) What parts of the body were exposed

What should I do to protect myself?

Followed safety precautions and procedures and complete required radiation safety training.

Report any occupational accidents involving radiation to safety officials immediately. Stay as far away from the site of the accident as possible.

Listen for instructions from safety officials and contact your doctor if believe have been exposed to radiation

Chemical Emergencies

Refer to an event or dangerous occurrence resulting in the release of a substance or substances that are hazardous to human health and/or the environment in the short or the long term.

Such events or occurrences include fires, explosions, leakages or releases of toxic substances that can cause illness, injury, disability or death, often for a large number of people.

Classification could be based on

Sources of the release

Chemical(s) involved, the amount released, their physical form, and where and how the release occurred

Extent of the contaminated area

Number of people exposed or at risk

Routes of exposure

Health or medical consequences of exposure

Example chemical accidents are

1984 gas leak in Bhopal (India)

2001 AZF fertilizer plant accident in Toulouse (France)

2000 explosions at the Fireworks S.E. company

Transportation accidents

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207411-gas-leak

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The main dangers of transportation accidents involving radiation are contact with and exposure to radioactive material, in the rare event that the shipping container is damaged. It is very unlikely that accidents involving transport of radioactive material will cause any radiation-related injuries or illnesses.

In general, the adverse health outcomes to toxic chemical exposure may be:

Effects on mental health arising from real or perceived releases, which depend on the psychosocial stress associated with an incident.

Effects that are systemic or affect organ systems remote from the site of absorption, such as depression of the central nervous system from inhalation of solvents, or necrosis of the liver from the inhalation of carbon tetrachloride.

Effects that are local or arise at the site of contact with the chemical, such as bronchoconstriction from respiratory irritants, or irritation of the skin and eyes by gases, liquids and solids.

EXAMPLE;
Accident in the transport of radioactive material.

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Nuclear Emergencies

Definition

When an IND explodes, it gives off four types of energy:
a blast wave,
intense light, heat, and radiation.

A nuclear emergency involves the explosion of a nuclear weapon or improvised nuclear device (IND).

Nuclear explosions produce fallout (radioactive materials that can be carried long distances by the wind).

What are the main dangers of an Improvised Nuclear Device (IND)?

People close to the blast site could experience:

Injury or death (as a result of the blast)

Moderate to severe burns

Flash blindness

Radiation Sickness (also called acute radiation syndrome or ARS) 3-Figure1-1

Contaminated food and water sources

How to protect yourself if an IND explodes?

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  • Emergency officials are trained to respond to disaster situations and will provide specific actions to help keep people safe.
  • Use radios, televisions, computers, mobile devices, and other tools to get the latest information.
  • Emergency officials will provide information on where to go to get screened for contamination.

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  • In a radiation emergency you may be asked to get inside a building and take shelter for a period of time.
    -This action is called “sheltering in place.”
  • Get to the middle of the building or a basement, away from doors and windows.
  • Bring pets inside.


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  • Staying inside will reduce your exposure to radiation.
  • Close and lock windows and doors.
  • Take a shower or wipe exposed parts of your body with a damp cloth.
  • Drink bottled water and eat food in sealed containers.

Example of IND accidents:
The bomb dropped on Hiroshima, Japan, at the end of World War II hiroshima-bombing-article-about-atomic-bomb

Dirty Bomb/ Radiological Dispersal Device download

Definition

What is the main danger of a dirty bomb?

A dirty bomb is a mix of explosives, such as dynamite, with radioactive powder or pellets. It is also known as a radiological dispersal device (RDD).

A dirty bomb cannot create an atomic blast like an improvised nuclear device or nuclear weapon.

When the dirty bomb explodes, the blast carries radioactive material into the surrounding area. atomic_blast-small

What immediate actions should I take to protect myself?

The main danger from a dirty bomb comes from the explosion, not the radiation.

The explosion from a dirty bomb can cause serious injuries and property damage.

Only people who are very close to the blast site would be exposed to enough radiation to cause immediate serious illness. However, the radioactive dust and smoke can spread farther away and could be dangerous to health if people breathe in the dust, eat contaminated food, or drink contaminated water.

If you are outside and close to the incident:

Cover your nose and mouth with a cloth to reduce the risk of breathing in radioactive dust or smoke.

Don’t touch objects thrown off by an explosion, they might be radioactive.

Quickly go into a building where the walls and windows have not been broken. This area will shield you from radiation that might be outside.

Once you are inside, take off your outer layer of clothing and seal it in a plastic bag if available. Put the cloth you used to cover your mouth in the bag, too. Removing outer clothes may get rid of up to 90% of radioactive dust.

Put the plastic bag where others will not touch it and keep it until authorities tell you what to do with it.

Shower or wash with soap and water. Be sure to wash your hair. Washing will remove any remaining dust.

Tune to the local radio or television news for more instructions.

If you are inside and close to the accident:

If the walls and windows of the building are not broken, stay in the building and do not leave.

To keep radioactive dust or powder from getting inside, shut all windows, outside doors, and fireplace dampers. Turn off fans and heating and air-conditioning systems that bring in air from the outside. It is not necessary to put duct tape or plastic around doors or windows.

If the walls and windows of the building are broken, go to an interior room and do not leave. If the building has been heavily damaged, quickly go into a building where the walls and windows have not been broken. If you must go outside, be sure to cover your nose and mouth with a cloth. Once you are inside, take off your outer layer of clothing and seal it in a plastic bag if available. Store the bag where others will not touch it.

Shower or wash with soap and water, removing any remaining dust. Be sure to wash your hair.

Tune to local radio or television news for more instructions.

Power Plant Accidents

Stays radioactive for
thousands of years

caused by the failure of technical components, by human error or by natural disasters

Example of power plant accidents

  1. Fukushima Daiichi nuclear plant (Japan) - 11/03/2011
  1. Chernobyl nuclear power plant (Ukraine) - 26/04/1986

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  1. Three Mile Island, Unit 2 (TMI-2) reactor in Pennsylvania (USA) - 28/03/1979

The outcomes are :-

  • Spills
  • Contamination
  • Environmental Impact

DANGER
Destruction of surrounding : no growth of floral
Sustain for years : Mutations, Cancer

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Presenting by Pratibha, Puvenya, Dayang and Hadirah