United States clearances[edit]
In the United States each new food is approved separately with a guideline specifying a maximum dosage; in case of quarantine applications the minimum dose is regulated. Packaging materials containing the food processed by irradiation must also undergo approval. Food irradiation in the United States is primarily regulated by the FDA[51] since it is considered a food additive. The United States Department of Agriculture (USDA) amends these rules for use with meat, poultry, and fresh fruit.[52]
The United States Department of Agriculture (USDA) has approved the use of low-level irradiation as an alternative treatment to pesticides for fruits and vegetables that are considered hosts to a number of insect pests, including fruit flies and seed weevils. Under bilateral agreements that allows less-developed countries to earn income through food exports agreements are made to allow them to irradiate fruits and vegetables at low doses to kill insects, so that the food can avoid quarantine.
The U.S. Food and Drug Administration (FDA) and the USDA have approved irradiation of the following foods and purposes:
Packaged refrigerated or frozen red meat[53] — to control pathogens (E. Coli O157:H7 and Salmonella), and to extend shelf life.[54]
Packaged poultry — control pathogens (Salmonella and Camplylobacter).[54]
Fresh fruits, vegetables and grains — to control insects and inhibit growth, ripening and sprouting.[54]
Pork — to control trichinosis.[54]
Herbs, spices and vegetable seasonings[55] — to control insects and microorganisms.[54]
Dry or dehydrated enzyme preparations — to control insects and microorganisms.[54]
White potatoes — to inhibit sprout development.[54]
Wheat and wheat flour — to control insects.[54]
Loose or bagged fresh iceberg lettuce and spinach[56]
http://en.wikipedia.org/wiki/Food_irradiation
«Вологодское молоко» (название ультрапастеризованного молока) сохранялось (и сейчас сохраняется) по полгода, но радиацией его вроде как никто никогда не обрабатывал. 
звыняйте, не сдержалась....пятница жеж 
