EFSA’s experts conclude that there are no microbiological risks for the consumer linked to the use of food irradiation. The practice of irradiation, although effective, should be considered only as one of several processes which can reduce the presence of pathogens in food. They say irradiation should be part of an integrated food safety management programme to protect consumers, which includes good agricultural, manufacturing and hygienic practices.
The experts state that most of the substances formed in food by irradiation are also formed during other types of food processing, with levels comparable to those arising, for instance, from the heat treatment of foods.
http://www.efsa.europa.eu/en/press/news/cef110406.htm