p*r
发帖数: 548 | 1 summary：
Iodine-131 0.165 mBq/m3
Iodine-132 0.03 mBq/m3
Tellurium-132 0.04 mBq/m3
Cesium-137 0.002 mBq/m3
Today, one of the monitoring stations in Sacramento, California that feeds
into the IMS detected miniscule quantities of iodine isotopes and other
radioactive particles that pose no health concern at the detected levels.
Collectively, these levels amount to a level of approximately 0.0002
disintegrations per second per cubic meter of air (0.2 mBq/m3).
Specifically, the level of Iodine-131 was 0.165 mBq/m3, the level of Iodine-
132 was measured at 0.03 mBq/m3, the level of Tellurium-132 was measured at
0.04 mBq/m3, and the level of Cesium-137 was measured at 0.002 mBq/m3.
Similarly, between March 16 and 17, a detector at the Department of Energy’
s Pacific Northwest National Laboratory in Washington State detected trace
amounts of Xenon-133, which is a radioactive noble gas produced during
nuclear fission that poses no concern at the detected level. The levels
detected were approximately 0.1 disintegrations per second per cubic meter
of air (100 mBq/m3),
The doses received by people per day from natural sources of radiation -
such as rocks, bricks, the sun and other background sources - are 100,000
times the dose rates from the particles and gas detected in California or
Washington State. | g*z
发帖数: 124 | 2 You breath less than 4135 m3 of air per year,
for Cs-137, means you get < 0.002e-6*4135 Bq in your lung.
that's 8.27e-6 Bq
highest committed equivalent dose coefficient of Cs-137
is
3.0e-07 Sv/Bq
so the annual dosage is 2.48e-12 Sv, eg, 2.48e-7 miliren
California that feeds
and other
detected levels.
0.0002
mBq/m3).
【在 p*r 的大作中提到】
: summary：
: Iodine-131 0.165 mBq/m3
: Iodine-132 0.03 mBq/m3
: Tellurium-132 0.04 mBq/m3
: Cesium-137 0.002 mBq/m3
: Today, one of the monitoring stations in Sacramento, California that feeds
: into the IMS detected miniscule quantities of iodine isotopes and other
: radioactive particles that pose no health concern at the detected levels.
: Collectively, these levels amount to a level of approximately 0.0002
: disintegrations per second per cubic meter of air (0.2 mBq/m3).
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