A radiological accident involves the release of radioactive materials outside the containers or facilities designed to house them. Such an accident could occur if there was a complication during the transport or use of radioactive material for medical or industrial purposes, or a serious operational problem at a nuclear facility.
In Canada, the risk of a nuclear or radiological incident is very low because of the stringent controls that govern the transport and use of radioactive material.
What are the risks in Québec?
The Canadian Nuclear Laboratories in Chalk River are in Ontario, on the Ontario side of the Ottawa River, some 200 kilometres northwest of Gatineau and Ottawa. In the event of a radiological accident at those laboratories, several Québec municipalities on the territory of the Pontiac RCM (regional county municipality) could be affected to varying degrees. That is why protection measures have been implemented (French only) to protect the population, the bio-food chain and the environment.
Located in the Centre-du-Québec region, the Gentilly-2 nuclear power plant ceased operations in December 2012. The nuclear facility is no longer a danger for the neighbouring population since decommissioning in 2013.
Find out about any facilities in your region that are a risk and the protection measures in place.
If you have iodine tablets at home, store them in a safe, temperate place (15°C to 30°C) not accessible to children and away from light and humidity.
What to do during
Take shelter inside a home and stay there as long as required by the authorities. Radioactive material released into the environment is invisible and odourless.
Close the doors and windows and turn off the ventilation, heating or air conditioning system. Note that rooms at the centre of the building or in the basement provide better protection.
Do not try to return home if you have taken shelter elsewhere; your safety will be ensured by the on-site personnel, by the police or by firefighters.
Do not pick up your children from school or the daycare centre; they are sheltered and safe where they are.
If a safe shelter is nearby, such as a home, do not take shelter in a car because a vehicle is not as effective as a building in protecting you from radioactive material.
If you have no other choice than to shelter in a vehicle, close the windows and do not turn on the ventilation.
Iodine tablets are available to individuals who live near a nuclear site. Residents who live within a 9-km radius of the reactor stack of the Canadian Nuclear Laboratories in Chalk River have received these tablets.
When recommended the regional public health direction, take the iodine tablets according to the prescribed dosage. It is one way to reduce the danger of contamination. Taking iodine tablets saturates the thyroid gland with stable (non-radioactive) iodine. As a result, the thyroid gland can no longer absorb or retain radioactive iodine, which is then eliminated naturally by the body.
Iodine tablets only protect the thyroid gland, and only against radioactive iodine. Their use is complementary to taking shelter, which protects the entire body from radiation.
Generally speaking, there are very few individuals for whom taking stable iodine is contraindicated. They include anyone with:
- a known allergy to iodine (however, allergies to seafood or to contrast agents used for radiological examinations are not contraindications)
- a thyroid disorder, such as hyperthyroidism, in association with a cardiac disorder
- one of the following rare disorders: dermatitis herpetiformis, hypocomplementemic vasculitis, congenital myotonia, pemphigus vulgaris and tuberous iododerma
Secondary effects associated with taking iodine tablets are very rare. Mild and temporary discomfort may occasionally occur. In most cases those symptoms disappear without treatment.
What to do after
If necessary, the authorities may:
- prohibit the consumption of fresh food and water or certain outdoor activities.
- order the preventive evacuation of a sector before the release of radioactive material, or the evacuation of a sector within the immediate vicinity of the accident, in the event of prolonged exposure to a radioactive release.
Follow the social media accounts for your municipality and Urgence Québec, and listen to local news for the instructions and recommendations to follow for a safe return to normal.
Pay attention to stress reactions after a disaster:
- Apathy or loss of energy
- Increased alcohol or drug use
Appropriate psychological guidance can help you cope with responsibilities stemming from the situation. Contact Info-Santé at 811 and select Info-Social to speak with a social worker. This confidential service is available 24 hours a day, 7 days a week.
Last update: July 6, 2021