Radiation
There are two types:
-
Ionising - such as electromagnetic rays (X-rays and gamma rays) or particles (alpha and beta)
-
Non-ionising - optical (lasers, ultraviolet, visible and infrared) and electromagnetic (microwaves and radio frequencies)
Laser safety information and training videos.
The Health Protection Agency provide introductory information about naturally-occurring and man-made radiation.
Ionising Radiation
Everyone is exposed to natural ionising radiation, from the earth, environment and sun.
Exposure can also take place through the administration of medical treatment but for most people, the level of exposure, and thus risk, will be low.
For people working with ionising radiation, as well as possible direct (external) irradiation, exposure can be internal (through inhalation, ingestion or through contamination of open wounds by radioactive substances).
Radon
Radon occurs naturally in the earths's rock, forming a gas which can build up in homes and workplaces. Maps showing the level of radon across the UK are available from the Health Protection Agency. Buildings which have underground cellars and basements are likely to be at higher risk according to the Health & Safety Executive.
The University is in a 'radon-affected area' but successive radon surveys have not indicated any occupied buidlings needing remedial action.
