>>SNIP
>>
>>>keep it in perpective. At Chernobyl the actual reactor was running at full power during a poorly planned test and exploded. The graphite in the reactor then caught fire . Nothing approaching that is happening in Japan.
>>
>>I haven't heard any news reports from state departments telling citizens to evacuate Tokyo. Only those within the 50 mile radius of the site. This is an interesting article on the overall situation over time:
>>
>>Special report - Mistakes, misfortune, meltdown: Japan's quake:
>>http://uk.reuters.com/article/2011/03/17/uk-japan-quake-meltdown-idUKTRE72G66420110317?pageNumber=1
>>
>>Statements by the U.S. Department of State:
>>http://www.state.gov/r/pa/prs/ps/2011/03/158459.htm
>>
>>Snippet:
>>
>>Despite the best efforts of responders, the situation remains very serious. Given the situation, we recommended the evacuation of American citizens to at least 50 miles, in keeping with the guidelines applied in the United States. Since the continued or increased release of windborne radioactive material cannot be ruled out, American citizens in Japan are advised to take prudent precautions against potentially dangerous exposure. As a general matter, residents in areas further from Fukushima Prefecture face less risk of significant exposure, but changing weather conditions and wind direction means that radiation levels in the future might become elevated.
>>
>>The Department of State urges American residents in Japan to take prudent precautions against the risk of sustained exposure, including relocating for potentially affected areas in northeastern Japan. The Department of State has authorized the voluntary departure, including relocation to safe areas within Japan, for family members and dependents of U.S. Government officials who wish to leave northeast Japan. The U.S. Government is also working to facilitate the departure of private American citizens from the affected areas – that is a 50-mile radius of the reactor – and a Travel Warning containing detailed information has been issued at www.travel.state.gov.
>>
>>Interestingly, radiation detectors were triggered at airports in the U.S. by luggage of passengers arriving from Japan:
>>http://www.bloomberg.com/news/2011-03-17/tokyo-passengers-trigger-u-s-airport-detectors-n-y-post-says.html
>
>The Foreign Office said it continued to advise against all non-essential travel to Tokyo and north-eastern Japan and British nationals currently in Tokyo and to the north of Tokyo should consider leaving the area.

And now voluntary evacuations for U.S. personnel as well:

http://www.navytimes.com/news/2011/03/ap-us-to-evacuate-americans-from-japan-031711/
Snippet:
The United States has authorized the first evacuations of Americans out of Japan, taking a tougher stand on the deepening nuclear crisis and warning U.S. citizens to defer all non-essential travel to any part of the country as unpredictable weather and wind conditions risked spreading radioactive contamination

Family members first:
http://www.bloomberg.com/news/2011-03-17/state-department-says-u-s-evacuation-flight-left-japan-1-.html

Snippet:

The U.S. State Department said its first evacuation charter flight left Japan today with fewer than 100 people aboard.

The flight, bound for Taipei, was the first of several planned for family members and dependents of State Department personnel stationed in the northeastern region of Japan, which suffered major damage from an earthquake and tsunami.