Official Fukushima Radiation levels at 10:22am JST
Reactor 2: 30 milli sieverts
Reactor 3: 400 milli sieverts
Reactor 4: 100 milli sieverts
Officials have confirmed that these levels will cause immediate harm to humans, not just over a long period of time.
I sincerely hope they are considering using robotic equipment.
From WIKI:
Dose Benchmarks
* Living near a nuclear power station = less than 0.01 mSv/year
* Chest x-ray = 0.04 mSv[1]
* Cosmic radiation (from sky) at sea level = 0.24 mSv/year[1]
* Terrestrial radiation (from ground) = 0.28 mSv/year[1]
* Mammogram = 0.30 mSv[1]
* Natural radiation in the human body = 0.40 mSv/year[1]
* Brain CT scan = 0.8–5 mSv[2]
* Typical individual’s natural background radiation: 2 mSv/year; 1.5 mSv/year for Australians, 3 mSv/year for Americans[3]
* Radon in the average US home = 2 mSv/year[1]
* Chest CT scan = 6–18 mSv[2]
* Average American’s total radiation exposure: 6.2 mSv/year[4]
* New York-Tokyo flights for airline crew: 9mSv/year [3]
* Smoking 1.5 packs/day = 13 mSv/year[5]
* Gastrointestinal series X-ray investigation = 14 mSv[1]
* Current average limit for nuclear workers: 20 mSv/year[3]
* Background radiation in parts of Iran, India and Europe: 50 mSv/year[3]
* Lowest clearly carcinogenic level: 100 mSv/year[3]
* Criterion for relocation after Chernobyl disaster: 350 mSv/lifetime[3]
Symptom Benchmarks
Effects to humans of acute radiation (within one day):[6]
* 0–0.25 Sv: None
* 0.25–1 Sv: Some people feel nausea and loss of appetite; bone marrow, lymph nodes, spleen damaged.
* 1–3 Sv: Mild to severe nausea, loss of appetite, infection; more severe bone marrow, lymph node, spleen damage; recovery probable, not assured.
* 3–6 Sv: Severe nausea, loss of appetite; hemorrhaging, infection, diarrhea, skin peels, sterility; death if untreated.
* 6–10 Sv: Above symptoms plus central nervous system impairment; death expected.
* Above 10 Sv: Incapacitation and death.