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TEPCO said it detected 2.35 billion becquerels of cesium per liter in water that is now leaking into the groundwater through cracks in the plant’s drainage system. This radiation level is roughly the same as that measured in April 2011.
The normal level is 150 becquerels of cesium per liter of water.
I am curious where you came up with your figures of only a few milligrams of radioactive particles being in the water?
2.35b becquerels of cesium per liter
ENrgLee
reply to post by Kevinquisitor
I am curious where you came up with your figures of only a few milligrams of radioactive particles being in the water?
Aw, geeze.... you just had to ask, eh? okay... here comes the math.
A bequerel is a unit of measurement that means "One atom discintigrating (decaying) per second."
A "Mol" is a unit of measurement of mass, based on the specific atomic mass of the substance in question.... Based on Carbon-12
One mol of an element is equivilant to it's atomic number in grams.
Hence, one mole of carbon-12 is 12 grams.
One mole of Caesium-137 is 137 grams.... etc...
To find the molar mass of a element, you must multiply it's atomic number, by Avogadro's Constant (Atoms per Mole) which is:
6.02214129 × 10^23 per mol
Or, in easier to read numbers....
602,214,129,000,000,000,000,000 atoms
602 septillion atoms per mol (137 grams)
Now, if we take Caseum 137 as our example, again... we need to find the half life of it, which is 30 years.
Which means that of one mol of caesium 137 (602 septillion atoms per mol (137 grams)) half of that decays in 30 years.
So, over the course of 30 years, we would expect 301 septillion (half of 602 septillion) discintigrations over a 30 year period.
Now, we have to find out how many seconds are in 30 years....
And google tells me it is 946,708,000seconds /30 years
So, now, we take that first figure of the half life discintigrations from one mol (137 grams) of caesium 137 (which is 301 septillion discintigrations) and divide that by 946,708,000seconds, and that should give us the normal decay activity of caesium 137...
Whic is:
301,107,060,000,000,000,000,000 divided by 946,708,000 seconds = 318,056,950,000,000 bequerels per mol
That's 318 trillion discintigrations per second, from a base sample size of caesium 137 of 137 grams.
You said that there was:
2.35b becquerels of cesium per liter
2.35 billion discintigrations per liter.... so....
318 trillion discintigrations per second, divided by 2.35 billion discintigrations per second = a ratio of 138260.869565 to 1
So, we take our molar mass of 137 grams, and divide that by 138260, ad we get:
0.00099088673 grams of caesium 137 per liter of water, based on radioactivity.
Which is not quite a milligram.
Edit: Now, to take this calculation even further.... we have to consider the fact of dilution.
Your stated activity of the caesium-137 (2.3 billion bequerels per liter) is the undiluted activity directly AT the fukushima plant.
Considering that the atlantic ocean contains:
323,600,000 cubic kilometres of water... which is 323,600,000,000,000,000 cubic meters
One liter of water is the standard of a kilogram (roughly)
And by volume, one liter is 1/1000 of a cubic meter.
So, 1,000 liters is a cubic meter of water.
So, the Atlantic ocean contains 3.23600 × 10^17 * 1,000 = 3.23600 × 10^20 liters, or
323,600,000,000,000,000,000 liters
So, if you take one liter of the caesium-137 laced water from fukushima, and dilute it's activity (2.3 billion bequerels) over the entire ocean....
You will have a new activity measurement per liter of: 0.0000000000071075402 bequerels per liter
Multiply that by the 300,000 liters per day and you get a new reading of: 0.00000213226 bequerels per liter
And multiply that by the (roughly) 1460 days since the incident, and we get a activity measurement of: 0.0031130996 bequerels per liter.
Which means that the total ceasium-137 release from fukushima has increased the natural radioactivity of the Atlantic ocean by one three thousandth of a discintigration per liter.
Keep in mind, the NATURAL activity of ocean water is on the order of 8,000 discintigrations per cubic meter (from uranium, potassium-40, and carbon-14)
So, we really don't have anything to worry about...
And it would take decades more steady release from Fukushima to bring the average radioactivity of the ocean up by a single bequerel.
Keep in mind, a Bequerel is a single atom discintigrating.
"It is by will alone I set my mind in motion, it is by the juice of saphu that the thoughts aquire speed, the lips aquire a stain, the stain becomes a warning, it is by will alone I set my mind in motion."edit on E7Sun, 12 Jan 2014 13:23:29 -060010America/ChicagoAmerica/Chicago by ENrgLee because: reasons
Wonderful math... tell you what.... you ingest 1 becquerel of cesium a day (swallow one day and inhale the next and repeat) from this day forward and get back to me in a few years on how your health is doing.
Im a FED... so what?
Natural radiation is completely different from man made radiation
I will buy anybody a one-way ticket to Japan that's willing to walk inside the reactor 3
How bout you go take a swim 1 mile off the coast of the reactor....... don't worry the water is perfectly safe
I am glad I am in my twilight years,,, the full effects of Fukushima won't be known for years, but trust me.... they will become known to your grandchildren.