released by UK gov late Thursday…
What to do in a radiation emergency
https://www.gov.uk/government/publications/radiation-emergencies-information-for-the-public/what-to-do-in-a-radiation-emergency
Actions to take: go in, stay in, tune in
There are important actions you should take to protect you and your family in the event of a radiation emergency.
Go in
The most important thing to do if you are told you are near a radiation emergency is go indoors as soon as you can and stay there. Close the doors and windows and stay as far away from external walls as possible.
Stay in
Staying indoors reduces your exposure to any radiation outside. You will be given advice on what to do next. Turn off all fans and air conditioning and close all external doors, windows and vents where possible. You will be given advice on what to do next. You may need to stay indoors for one to two days.
Tune in
Monitor the news and follow official UK advice on GOV.UK for what to do next. Any changes to advice will be communicated to you via official sources – this may be via the radio, television, internet, social media or the police.
Follow the local official advice
Emergency services and local authorities will provide information about what has happened and what you should do. This may be provided via the radio, television, internet, social media or the police.
What you need to do to protect yourself will depend on where you are in relation to where the radiation emergency is, so it is essential to follow the advice provided where you are. Radiation cannot be seen, heard, smelt, tasted or felt, so it is important that you follow the advice given to you, even if you can’t tell that anything has happened. If you are overseas, follow the local official advice.
You may be advised by the emergency services to evacuate, and you should be prepared to do this, if needed, following advice issued for your area. You should not evacuate unless advised to do so, as leaving shelter may increase your exposure to radiation.
If a radiation emergency happens outside the UK, it is very unlikely that you will need to do anything different from normal if you are in the UK at the time. Any official advice for the UK public will be given on the television, radio, internet or social media.
How these actions will help to protect you
Radiation emergencies are situations that could potentially lead to an increased risk of exposure to significant radiation, such as an incident at a nuclear power plant or an incident during the transport of radioactive material. Radiation emergencies are rare events, but we can greatly reduce their potential impact by being prepared for them, should one occur. The UK government, local authorities and organisations responsible for nuclear facilities both in the UK and overseas have detailed plans in place to protect the public in the event of a radiation emergency.
A radiation emergency may involve the release of materials (for example gases, dust and larger fragments) which are emitting radiation. These are known as radioactive materials.
In the event of a radiation emergency, people may be exposed by:
breathing in radioactive materials
direct exposure to radioactive material carried in the air and deposited on surfaces, clothing or skin
eating or drinking food or water contaminated with radioactive materials
People who are in close proximity to a powerful source of gamma rays may be directly exposed to radiation but may not be contaminated with radioactive material.
If there is a release of radiation, sheltering in a building made of robust and dense materials, such as those used for permanent buildings, will provide adequate protection from most radiation exposure. This is because, although certain types of radiation (gamma rays) can penetrate materials such as glass, plastic and metal, other types of radiation (alpha and beta) are less penetrating. Going inside the nearest building or staying in the building that you are already in, sometimes called sheltering in place, will also help to prevent you becoming contaminated with radioactive particles that could be inhaled or ingested. Further information on the different types of radiation and radioactive materials is available: Basic concepts of radiation.
p1