- Gendai: Radioactivity detected in Tokyo park sample at Chernobyl evacuation level?
- Asahi Source: Locations in Chiba came under heavy nuclear fallout; Borders Tokyo -- Contamination has potential to affect ecosystems
Title: Tokyo station is contaminated as mandatory evacuating zone in Fukushima
Source: Fukushima Diary
Date: Feb 25, 2012
On 2/21~23/2012, a Twitter user measured radiation level at Tokyo station and it turned out to be 2.94~6.5 microSv/h. [...]
1m height from the ground : 6.5~4.8 microSv/h
1.8m height from the ground : 3.0~4.2 microSv/h
The reason of this high level of contamination is assumed to be because hot particles are brought from Fukushima or North Japan by the shoes of passengers.
@bien1321 This dosimeter to detect γ-rays every 10 seconds in about 5 minutes from start to finish measurement. 6.5μ ~ 4.8μSv 1m3 times height measurements. Was 3.0μ ~ 4.2μSv 1.8m3 times height measurements. The image is part of a total of six times.
6.5 microSv/hr * 24 hr/day * 365 day/yr = 56,940 microSv/yr
Via ABC Australia: “After Chernobyl anyone likely to be exposed to more than 5 millisieverts a year was evacuated, and those in areas of 1-5 mSv were offered relocation and bans were placed on eating locally produced food.”
Title: Tōkaidō Shinkansen
The Tōkaidō Shinkansen (東海道新幹線?) is a Japanese high-speed Shinkansen line, opened in 1964 between Tokyo and Shin-Ōsaka. It is operated by the Central Japan Railway Company (JR Central), and formerly by Japanese National Railways (JNR). It is the most heavily travelled high-speed rail route in the world by far
Title: Tōkyō Station
Tokyo Station (東京駅 Tōkyō-eki?) is a railway station in the Marunouchi business district of Chiyoda, Tokyo, Japan, near the Imperial Palace grounds and the Ginza commercial district.
It is the main intercity rail terminal in Tokyo, the busiest station in Japan in terms of number of trains per day (over 3,000), and the fifth-busiest in Eastern Japan in terms of passenger throughput. [...]
Published: February 25th, 2012 at 5:32 pm ET
- Five more reports of high radiation levels in Tokyo’s Adachi ward — Over 20 millisieverts per year at school, above evacuation level October 18, 2011
- Tokyo gov’t finds at least 5 times higher cesium levels than Japan gov’t — Over 50,000 Bq/m² near city center (PHOTOS) October 8, 2011
- Radiation spikes in Tokyo at Shinjuku detector — Up to triple normal levels March 27, 2012
- Radiation dose near Tokyo higher than some locations inside 30 km evacuation zone (PHOTOS) July 20, 2011
- Radiation triples at Tokyo monitoring station — Levels spike at multiple locations in last two hours May 2, 2012