The primary aim of this study is to analyze and describe how a radioactive deposition after nuclear weapons employment outside Sweden would affect the domestic food production in a short time perspective and in the sequence of events from primary production over processing and transport to food consumption. The study is an attempt at a comprehensive treatment of knowledge needed as a basis for decisions on operative issues, often of a time-urgent nature. Actions to alleviate the problems pertinent to the food supply in the event of radioactive fallout are also discussed, although without any claim of exhaustive coverage. Other aspects, as the economical consequences of the disturbances due to the fallout situation (or of possible counteractions) are not dealt with, however. With certain restrictions mentioned in the text the results are also applicable in connection with radioactive deposition caused by accidental release from a nuclear power plant. 60 refs, 32 figs.