Since our inception in 2002, our philosophy has always been to provide free information resource to those who want to know more about ionising radiation, radiation protection in the workplace and its use in medicine and existence in the environment.
The definition of 'safe' is not strictly an engineering term; it's a societal term. Does it mean absolutely no loss of life? Does it mean absolutely no contamination with radiation? What exactly does 'safe' mean?
– Henry Petroski