The second EPZ, called the ingestion exposure pathway zone, includes residents within a 50-mile-radius from the nuclear reactor.

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It is the advice that we would give to Americans living within a 50-mile radius of a nuclear power plant that was experiencing a similar series of problems that this power plant is experiencing, and that is why we issued the advisory.

WHITEHOUSE: Press Briefing

Countries including the U.S., U.K and Korea have ordered the evacuation of their citizens in Japan within a 80-kilometer radius of the Fukushima nuclear power plant, which has been leaking radiation since the massive earthquake on March 11.

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We are advising, based on new information in a deteriorating and fast-moving situation at a nuclear reactor site in Japan, that American citizens within a 50-mile radius of that plant should evacuate beyond the 50-mile mark.

WHITEHOUSE: Press Briefing