Government envisioned Tokyo evacuation in worst-case scenario, AJW by The Asahi Shimbun, Jan. 7, 2012:
[...] In a worst-case scenario, the central government would have requested the evacuation of Tokyo and everyone within a 250-kilometer radius of the damaged Fukushima No. 1 nuclear power plant.
Goshi Hosono, minister in charge of the nuclear disaster [...] said the government had not disclosed the report, which had been submitted on March 25, out of concern over public reaction.
“We had refrained from publicizing it because we were afraid that it could cause the public to grow excessively worried,” he said. [...]
- Melting of 1,535 fuel assemblies, an equivalent of fuel used for two reactors, kept in a spent fuel storage pool at the No. 4 reactor
- If another hydrogen explosion took place at the No. 1 reactor, workers would be forced to flee and suspend recovery operations
- Resulting in an enormous amount of radioactive material released from the pool in two weeks
High radiation levels could have extended beyond the 250-km radius, and people in those areas would have also been advised to relocate
Less Worse Worst-Case Scenario
If the release of cesium was limited to an equivalent of one reactor, the mandatory evacuation zone would have been a radius of 110 km and recommended evacuation a radius of 200 km
It would have taken several decades for radiation levels to decrease naturally in the mandatory and voluntary evacuation zones
Worst-Cast Last Resort
Blocking radiation by covering the damaged reactors and the pool with 1,100 tons of materials mixed with sand and water each was considered a last resort to contain the crisis
Published: January 7th, 2012 at 5:17 pm ET