Day | Iodine-131 *(µBq/m3) | Cesium-134 (µBq/m3) | Cesium-137 (µBq/m3) |
March 23 | 33 | 4.2 | 5.7 |
March 24 | 480 | 92 | 120 |
March 25 | 54 | 6.3 | 7.7 |
March 26 | 20 | 0.7 | 0.7 |
March 27 | 47 | 2.6 | 3.1 |
March 28 | 93 | 4.4 | 5.3 |
March 29 | 130 | 4.6 | 5.3 |
"Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, April 1, 2011: 85 to 140 nSv/hr (nanosieverts per hour), STATUS: NORMAL"
This is reassuring, though sometimes i wonder if these values are actually in milliBq instead of microBq. These mistakes have been made before, and this news piece should have us looking at their numbers with a critical eye. In absence of our own equipment, we'll just have to take their word for it.
Hong Kong radiation readings are now higher than Tokyo; Officials use this fact to emphasize the variability of "backround" radiationThis is reassuring, though sometimes i wonder if these values are actually in milliBq instead of microBq. These mistakes have been made before, and this news piece should have us looking at their numbers with a critical eye. In absence of our own equipment, we'll just have to take their word for it.
The reasoning seems to be "but Tokyo's readings are only 0.10 microSV, so what's the big deal?" These recent, increased levels reveal the tremendous influence of the wind - plain and simple. Variable breezes over the past week have sent low level venting from Fukushima in the direction of HK and upped readings in the Kowloon district of Hong Kong to 0.14 microsieverts per hour. At constant levels, this will result in a yearly dose of 122.64 milliREM per year - "safe", but remember, the goal in life is to keep ones cumulative radiation exposure as low as reasonably achievable (ALARA).
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