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Old 14.07.2013, 21:22
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radioactivity in biel lake

http://www.journaldujura.ch/nouvelle...te-dans-le-lac

ok, it' s a safe level etc and it was some years ago ( not sure this is a good thing, though), anyway i' m not so happy


( in brief:
in april 2010 they found a radioactivity peak in biel lake, probably due to discharge of water from muhlenberg central in 2000 )
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Old 14.07.2013, 21:53
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Re: radioactivity in biel lake

Great news. and i went there swimming today...
was uns nicht umbringt, macht uns stärker - oder so
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Old 14.07.2013, 22:17
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Re: radioactivity in biel lake

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Great news. and i went there swimming today...
was uns nicht umbringt, macht uns stärker - oder so
I last went swimming there in 2010, and now I'm green with envy
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Old 14.07.2013, 22:52
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Re: radioactivity in biel lake

And a plus point is that the lake won't freeze over in winter any more.
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Old 14.07.2013, 23:12
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Re: radioactivity in biel lake

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And a plus point is that the lake won't freeze over in winter any more.
but i like iceskating!!
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Old 14.07.2013, 23:24
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Re: radioactivity in biel lake

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Great news. and i went there swimming today...
was uns nicht umbringt, macht uns stärker - oder so
Just like in this song...

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Old 14.07.2013, 23:33
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Re: radioactivity in biel lake

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Just like in this song...

fixed that for ya.
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Old 14.07.2013, 23:53
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Re: radioactivity in biel lake

my song for the été biennois ;-)
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Old 15.07.2013, 04:18
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Re: radioactivity in biel lake

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ok, it' s a safe level etc and it was some years ago ( not sure this is a good thing, though)
It was 3 years ago. CS 137 loses half of the radioactivity every 30 years, so you can assume that some 95% of the radiation is still there... it is an artificial isotope that simply cannot be found naturally - so it has to come from the nuclear power plant (or some Bond villains underground lair deep under biel lake...).

It is the exact same stuff that came out of Tchernobyl (and Fukushima) - so most of us have eaten many veggies, mushrooms and game meat that had some of it in them... the key question is "how much?" and if I get the article right is it very little.
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Old 15.07.2013, 09:07
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Re: radioactivity in biel lake

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It was 3 years ago. CS 137 loses half of the radioactivity every 30 years, so you can assume that some 95% of the radiation is still there... it is an artificial isotope that simply cannot be found naturally - so it has to come from the nuclear power plant (or some Bond villains underground lair deep under biel lake...).

It is the exact same stuff that came out of Tchernobyl (and Fukushima) - so most of us have eaten many veggies, mushrooms and game meat that had some of it in them... the key question is "how much?" and if I get the article right is it very little.
Sorry for being too picky, but you can't say that it loses half of the radioactivity every 30 years. Half-life is just a probabilistic figure which shows that there is a decay probability for 50% of the substance. You can't use accurate figures when it goes about elementary particles.

My opinion is that this Cs-137 of Chernobyl origin. Most probably it stayed for 25 years or so in the silt but then released somehow. And you shouldn't be worried - a lot of people get much more significant doses from x-rays, plane traveling, fossil fuel combustion (incl. cars, etc.).
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Old 15.07.2013, 09:43
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Re: radioactivity in biel lake

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Sorry for being too picky, but you can't say that it loses half of the radioactivity every 30 years. Half-life is just a probabilistic figure which shows that there is a decay probability for 50% of the substance. You can't use accurate figures when it goes about elementary particles.
The point was that a measurement made 3 years ago is still very relevant today. And I could not give a rats arse if we are today at 97 or 94% of the radiation measured back then... because your lecture is absolutely irrelevant when it comes to the question "is it likely still there?" The answer is yes.


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My opinion is that this Cs-137 of Chernobyl origin. Most probably it stayed for 25 years or so in the silt but then released somehow.
Nice. Who needs sources if we can have opinions? Biel was not exactly in the fall out area of Chernobyl, was it?


But there is a power plant just some miles away in Muehleberg - it is one of the oldest reactor designs which uses not the typical cooling towers other plants have, but directly the Aare river water... which directly leads into the lake. I am personally not exactly the strongest opponent of nuclear power - but this plant in particular is famous for it's really bad design as well as security issues (the cracks in the containment they found 23 years ago are by now at 90% of the wall strength while the operator does not seem to "rush" any repairs or safety concepts. I think nuclear power plants should not be run by Bernese.).
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Old 15.07.2013, 10:07
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Re: radioactivity in biel lake

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Great news. and i went there swimming today...
was uns nicht umbringt, macht uns stärker - oder so
Are you "glowing" with satisfaction?
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Old 15.07.2013, 10:10
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Re: radioactivity in biel lake

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Are you "glowing" with satisfaction?
I am!
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Old 15.07.2013, 10:11
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Re: radioactivity in biel lake

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I am!
Almost looks like it is blinding you as well. Poor girl.
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Old 15.07.2013, 10:16
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Re: radioactivity in biel lake

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The point was that a measurement made 3 years ago is still very relevant today. And I could not give a rats arse if we are today at 97 or 94% of the radiation measured back then... because your lecture is absolutely irrelevant when it comes to the question "is it likely still there?" The answer is yes.




Nice. Who needs sources if we can have opinions? Biel was not exactly in the fall out area of Chernobyl, was it?


But there is a power plant just some miles away in Muehleberg - it is one of the oldest reactor designs which uses not the typical cooling towers other plants have, but directly the Aare river water... which directly leads into the lake. I am personally not exactly the strongest opponent of nuclear power - but this plant in particular is famous for it's really bad design as well as security issues (the cracks in the containment they found 23 years ago are by now at 90% of the wall strength while the operator does not seem to "rush" any repairs or safety concepts. I think nuclear power plants should not be run by Bernese.).
OK, you've made a nice study but Cesium-137 is a product of nuclear fission and stays in fuel tablets which are hermetically sealed inside fuel rods. Release of Cesium-137 is only possible if fuel rods loose tightness and this is actually treated as serious radiation accident (at least Level 4 INES scale).
So in no way this Cesium was released from Muehleberg.
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Old 15.07.2013, 10:18
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Re: radioactivity in biel lake

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OK, you've made a nice study but Cesium-137 is a product of nuclear fission and stays in fuel tablets which are hermetically sealed inside fuel rods. Release of Cesium-137 is only possible if fuel rods loose tightness and this is actually treated as serious radiation accident (at least Level 4 INES scale).
So in no way this Cesium was released from Muehleberg.
But, the real question is, can we make a new kind of jello from that?
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Old 15.07.2013, 10:22
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Re: radioactivity in biel lake

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Almost looks like it is blinding you as well. Poor girl.
I need a way to deal with this city somehow...
And i used to love living in Switzerland. But that wasn't in bienne
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Old 15.07.2013, 10:27
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Re: radioactivity in biel lake

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I need a way to deal with this city somehow...
And i used to love living in Switzerland. But that wasn't in bienne
Which city, where, what?
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Old 15.07.2013, 10:54
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Re: radioactivity in biel lake

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Which city, where, what?
a small village. unfortunately there's no need for musicologists and i can't spend all my life being a skiinstructor.
wait a minute. why not?
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Old 15.07.2013, 11:13
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Re: radioactivity in biel lake

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Are you "glowing" with satisfaction?
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I am!
Can't you see this invisible smile
 




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