Bionerd, what is the difference between, say, 0.5 mS in Japan and 0.5mS in Brazil?
I mean, some part of Brazil gets a high dose of radiation coming from solar activity but no Cs-137 in the air, while in Japan the same leve of radiation is due to Cs-137 (and the like) dispersed in the air and in the food people eat.
I saw the Japanese government comparing the two as a mean to say that in Fukushima is safe to stay/eat/etc, but this point was never clarified.
@bionerd23 It was in the local newspaper right after the incident. They've published a map of the world showing places with high radiation as a mean to say that here in Japan, after all, it is relatively safe.
Among the places there was Guarapari, Ramsar (Iran) and others
google guarapari brazil background radiation
On Wikipedia (taken from PubMed) it says that it has 175 milliSievert / year, and I was wondering if that radiation is safer than the radiation from Cs137 floating around here
well, after a quick look, it seems like its thorium-232 (monazite sand). if the thorium is chemically bound to the sand, which can be expected, then most you receive is a gamma radiation dose when walking across the sand etc., which is much "healthier" (as in, lower doses) than incorporated beta-gamma emitters (caesium-isotopes, for example, migrate to muscle tissue and bombard the cells with beta AND gamma radiation for a long time -> long biological half-life, more dose).
however, as for working with radioactive materials, different sources state that 20 mSv/a to 50 mSv/a should not be exceeded, as with those doses, there is no scientific evidence of these doses significantly increase your chance for cancer. it is supposed to be as dangerous as working in other "dangerous" jobs, such as working with heavy machinery that can cause physical trauma.
however, as for 150+ mSv/a, there are different opinions... google for "hormesis". sounds interesting, and i'd not rule it out - i'd try it on myself, but yet, i cannot recommend living in such areas, as i'm just not certain about the effects.
Thanks for your work! Why the disparity with your previous video, it seems the levels of cesium are 4 times lower than the ones you detected in your previous analysis? Also, do you think this results contradict the fallout data published by the Japanese government (around 17,000 Bq/m2 of both Cs-134 and Cs-137 detected in Shinjuku, Tokyo)?
well, it's lower than initially estimated, but still not really good. but yeah, we knew that before. i think the "fallout" (washout) can greatly vary depending on wind direction and rain etc., so it's possible to have greatly varying contaminations, e.g. 500-50000 Bq / kg (Cs), depending where stuff came down. these "pockets" of radiation have been known to form after chernobyl, too, with varying contaminations.
well, it's lower than initially estimated, but still not really good. but yeah, we knew that before. i think the "fallout" (washout) can greatly vary depending on wind direction and rain etc., so it's possible to have greatly varying contaminations, e.g. 500-50000 Bq / kg (Cs), depending where stuff came down. these "pockets" of radiation have been known to form after chernobyl, too, with varying contaminations.
All, you might want to read a document I found. Google for thesisblairdoc.pdf The 1st result is a DL link.
The paper details a Cs137 survey of Southern Utah (downwind of the NTS.) They measured up to 2K+ Bq per square meter (somewhat different units) ~40 years after the Cs arrived. Cs apparently binds strongly to the soil, so it sticks around for a long while. Utah levels seem surprisingly high compared to Tokyo samples that were collected from a concentrating hot spot.
Thats all very nice, but what about the interpretation??? Eat it, dont eat it??? Safe to visit, or fast getaway??? Dangerous after what amount of time??? Explanations would be helpful, for all the non-nerds.
in theory? i wouldnt recommend living in that area. it's not an immediate danger to health, but evacuation would be reasonable with radiation levels like that - either that, or major decontamination procedures. these may just be hot pockets, but how do you make sure you dont breathe that stuff? run around with masks and geiger counters every time you take a step outside? hmmm.
well, i guess you'd have to, as its not possible to evacuate TOKYO...
is that a good thing, eh? even the news officially admit we're importing nuclear power from france and czech republic now. the czech republic is even thinking of building NEW nuclear power plants, as the kWh price went up... and, in case you didnt know, the czech republic as well as france are both NEIGHBORING countries to us.
this is utter BULLSHIT, calming the minds of ignorant people. either make EU-wide laws, or it'll be absolutely useless. radiation doesnt stop at borders.
What does that mean as actual effect on the inhabitants of that area? I am completely helpless with natural sciences :) What would be normal e.g. in that area before Fukushima Powerplant got hit by the tsunami?
~0.2 uSv/h are normal background radiation for japan. of course, it's unknown what was there before regarding to radioisotopes - but you didnt have hotspots / pockets of radiation like that before afaik (i wasnt there to measure it myself, so cant tell for sure, of course).
I was thinking where you could find samples of soil from before the incident. I was thinking about crops/plants produced in that area. I'm sure there are a lot food products grown in Tokio region and maybe they could be obtained and compared with ones made after the accident. I'm talking about i.e. tea or some canned beans, rice maybe?
I know plants are not a direct substitute for real soil samples but I'm sure they absorb radio isotopes. That could be an interesting comparison.
it's quite easy to tell apart radon washout (which is NORMAL and NATURAL to happen with rainfall, as it is a results of NATURAL radioisotopes contained in our planet - such as uranium 238) from cesium washout; just measure the source again every hour. if you see a drastic drop in activity over the course of one day, it's MOST LIKELY radon daughter products and natural. the activity with Cs-137 / Cs-134 would stay the same over the course of a few days (half lives: 30 yrs, 2 yrs).
@bionerd23 Your 100% correct! I am hoping to buy a HPG detector or a scintillator in a few months time. When I do, I can finally test in my own home. =)
I just bought an Sr90 0.1 uCi source disk from Spectrum Techniques. I will contain it in a > 6mm Al container. I calculate that Sr90's beta's can travel up to 9.44x10^-2 cm through aluminium and 186.96 cm through air at 20c, sea level. lol Fun stuff!
2:47 — Contamination of 137-Cs = 2,900 Bq/kg, which corresponds to the physical quantities of Cesium in the soil?
137-Cs is an isotope with high activity: 3.22 TBq/gram
Thus, in 1kg of soil is physically: 2,900 : 3,222,000,000,000 = ~0.0000000009gram = ~0.9 nano g. (9E-10 g.) of 137-Cs per kg of soil
This corresponds to the ratio: 1,111,034,482,758 : 1 of the amount of soil to the amount of Cs, contained in it!
BTW: Activity of 134-Cs is 47.92 TBq/gram — please check if it "is", in the soil
AndrzejKaron 4 months ago
Bionerd, what is the difference between, say, 0.5 mS in Japan and 0.5mS in Brazil?
I mean, some part of Brazil gets a high dose of radiation coming from solar activity but no Cs-137 in the air, while in Japan the same leve of radiation is due to Cs-137 (and the like) dispersed in the air and in the food people eat.
I saw the Japanese government comparing the two as a mean to say that in Fukushima is safe to stay/eat/etc, but this point was never clarified.
peppeddu 5 months ago
@peppeddu forgot to mention, mS means microSievert not milli!
peppeddu 5 months ago
@peppeddu
i never heard of that before. do you have a source? also, what do you mean, 0.5 mS = 0.5 mSv (milisievert)? per what (time unit? year?)?
bionerd23 5 months ago
@bionerd23 It was in the local newspaper right after the incident. They've published a map of the world showing places with high radiation as a mean to say that here in Japan, after all, it is relatively safe.
Among the places there was Guarapari, Ramsar (Iran) and others
google guarapari brazil background radiation
On Wikipedia (taken from PubMed) it says that it has 175 milliSievert / year, and I was wondering if that radiation is safer than the radiation from Cs137 floating around here
peppeddu 5 months ago
@peppeddu
well, after a quick look, it seems like its thorium-232 (monazite sand). if the thorium is chemically bound to the sand, which can be expected, then most you receive is a gamma radiation dose when walking across the sand etc., which is much "healthier" (as in, lower doses) than incorporated beta-gamma emitters (caesium-isotopes, for example, migrate to muscle tissue and bombard the cells with beta AND gamma radiation for a long time -> long biological half-life, more dose).
bionerd23 4 months ago
however, as for working with radioactive materials, different sources state that 20 mSv/a to 50 mSv/a should not be exceeded, as with those doses, there is no scientific evidence of these doses significantly increase your chance for cancer. it is supposed to be as dangerous as working in other "dangerous" jobs, such as working with heavy machinery that can cause physical trauma.
bionerd23 4 months ago
however, as for 150+ mSv/a, there are different opinions... google for "hormesis". sounds interesting, and i'd not rule it out - i'd try it on myself, but yet, i cannot recommend living in such areas, as i'm just not certain about the effects.
bionerd23 4 months ago
@bionerd23 Also, my bad, I've recalled from memory that in those places it was radiation from solar activity, but they wrote that it was *natural*
peppeddu 5 months ago
Thanks for this - much better than info from enenews and similar sites!
NLKennedy 5 months ago
Thanks for your work! Why the disparity with your previous video, it seems the levels of cesium are 4 times lower than the ones you detected in your previous analysis? Also, do you think this results contradict the fallout data published by the Japanese government (around 17,000 Bq/m2 of both Cs-134 and Cs-137 detected in Shinjuku, Tokyo)?
0GTC 5 months ago
@0GTC
well, it's lower than initially estimated, but still not really good. but yeah, we knew that before. i think the "fallout" (washout) can greatly vary depending on wind direction and rain etc., so it's possible to have greatly varying contaminations, e.g. 500-50000 Bq / kg (Cs), depending where stuff came down. these "pockets" of radiation have been known to form after chernobyl, too, with varying contaminations.
bionerd23 5 months ago
@0GTC
well, it's lower than initially estimated, but still not really good. but yeah, we knew that before. i think the "fallout" (washout) can greatly vary depending on wind direction and rain etc., so it's possible to have greatly varying contaminations, e.g. 500-50000 Bq / kg (Cs), depending where stuff came down. these "pockets" of radiation have been known to form after chernobyl, too, with varying contaminations.
bionerd23 5 months ago
@bionerd23
All, you might want to read a document I found. Google for thesisblairdoc.pdf The 1st result is a DL link.
The paper details a Cs137 survey of Southern Utah (downwind of the NTS.) They measured up to 2K+ Bq per square meter (somewhat different units) ~40 years after the Cs arrived. Cs apparently binds strongly to the soil, so it sticks around for a long while. Utah levels seem surprisingly high compared to Tokyo samples that were collected from a concentrating hot spot.
geonerd 1 month ago
Thats all very nice, but what about the interpretation??? Eat it, dont eat it??? Safe to visit, or fast getaway??? Dangerous after what amount of time??? Explanations would be helpful, for all the non-nerds.
Garfuck 5 months ago
@Garfuck
in theory? i wouldnt recommend living in that area. it's not an immediate danger to health, but evacuation would be reasonable with radiation levels like that - either that, or major decontamination procedures. these may just be hot pockets, but how do you make sure you dont breathe that stuff? run around with masks and geiger counters every time you take a step outside? hmmm.
well, i guess you'd have to, as its not possible to evacuate TOKYO...
bionerd23 5 months ago
I DONT CARE ABOUT THIS SHIT JUST 2 PROVOKE U!
mightyhustler 5 months ago
@mightyhustler shubadabudabadoooouuuu
Anonymuskid 5 months ago
There is one god thing about this horrible acsident
Germany is now officialy shutting down all nuclear power plants
joejoe4games 5 months ago 5
@joejoe4games And in Italy 97% of the people who voted for a nuclear referendum, have decided that they don't want nuclear power forever
peppeddu 5 months ago
@joejoe4games
is that a good thing, eh? even the news officially admit we're importing nuclear power from france and czech republic now. the czech republic is even thinking of building NEW nuclear power plants, as the kWh price went up... and, in case you didnt know, the czech republic as well as france are both NEIGHBORING countries to us.
this is utter BULLSHIT, calming the minds of ignorant people. either make EU-wide laws, or it'll be absolutely useless. radiation doesnt stop at borders.
bionerd23 5 months ago
@bionerd23
hmmm it isn't easy to make EU wide laws, because every country is in therms of the Law indipendent
hopefully the countrys without nuclear energy will act as a model
joejoe4games 5 months ago
Hello
MsQuiksilver93 5 months ago
this is sick >.<
I mean what does it give to you ? gouvernment won't argue to that, the will just say "what, that cant be true, its totally undangerous!" ^^
But really nice of you that you did that testing..
psp271seb3 5 months ago
ur a girl or a guy
TheSyndicateHD 5 months ago 2
What does that mean as actual effect on the inhabitants of that area? I am completely helpless with natural sciences :) What would be normal e.g. in that area before Fukushima Powerplant got hit by the tsunami?
FeinnWarrior 5 months ago
@FeinnWarrior
~0.2 uSv/h are normal background radiation for japan. of course, it's unknown what was there before regarding to radioisotopes - but you didnt have hotspots / pockets of radiation like that before afaik (i wasnt there to measure it myself, so cant tell for sure, of course).
bionerd23 5 months ago
Where in Tokyo were these samples collected? It's a vast urban area.
KataVideo 5 months ago
@KataVideo
just to the west of tokyo (sagamihara).
bionerd23 5 months ago
I was thinking where you could find samples of soil from before the incident. I was thinking about crops/plants produced in that area. I'm sure there are a lot food products grown in Tokio region and maybe they could be obtained and compared with ones made after the accident. I'm talking about i.e. tea or some canned beans, rice maybe?
I know plants are not a direct substitute for real soil samples but I'm sure they absorb radio isotopes. That could be an interesting comparison.
LechuCzechu 5 months ago
good work, keep going I Support you
Obi007007 5 months ago
You are a hero :-) And if you keep up your radiation exposure you might become a super hero :-P
michalchik 5 months ago
As long as this doesn't mutate a lizzard into becoming giant, I think we're okay
Azyashi 5 months ago
omg. Every channel i watch sooner or later get partnership.
SilentNinjja 5 months ago
@verwoestijning 155 miles away from the leak and the radiation has spiked that much, the Japanese
Gov. is lying
hrjert1 5 months ago
This is the sort of testing I have been trying to get people to perform when they claim their high rain readings, which I am not sure I believe.
Samples should be sent to a lab and tested via gamma spectrography.
Wonderful job Bionerd!
This is the kind of real science needed on YouTube!
antiprotons 5 months ago 4
@antiprotons
it's quite easy to tell apart radon washout (which is NORMAL and NATURAL to happen with rainfall, as it is a results of NATURAL radioisotopes contained in our planet - such as uranium 238) from cesium washout; just measure the source again every hour. if you see a drastic drop in activity over the course of one day, it's MOST LIKELY radon daughter products and natural. the activity with Cs-137 / Cs-134 would stay the same over the course of a few days (half lives: 30 yrs, 2 yrs).
bionerd23 5 months ago
@bionerd23 Your 100% correct! I am hoping to buy a HPG detector or a scintillator in a few months time. When I do, I can finally test in my own home. =)
I just bought an Sr90 0.1 uCi source disk from Spectrum Techniques. I will contain it in a > 6mm Al container. I calculate that Sr90's beta's can travel up to 9.44x10^-2 cm through aluminium and 186.96 cm through air at 20c, sea level. lol Fun stuff!
Keep up the good work!
antiprotons 5 months ago
The average dose rate in Denver is 1.4 uSv/hr. To quote Myron Pollycove, this isn't even enough radiation to be beneficial, let alone harmful.
clumma 5 months ago
TY very much for your hard work.
cowyow101 5 months ago
AWSOME!
GabloFX2 5 months ago