If someone wants to talk to me about bioaccumulation of Cs137 in tissue abs biological half-life versus physics half life we can go there
November 27, 2025 at 7:01 PM
If someone wants to talk to me about bioaccumulation of Cs137 in tissue abs biological half-life versus physics half life we can go there
Oh fascinating.
Today I learned that apparently the gamma associated with Cs137 decay…
…is actually because a large majority fraction of Cs137 decays into Barium137m* which emits gamma when it drops to ground.
*a metastable nuclear isomer.
Today I learned that apparently the gamma associated with Cs137 decay…
…is actually because a large majority fraction of Cs137 decays into Barium137m* which emits gamma when it drops to ground.
*a metastable nuclear isomer.
December 12, 2025 at 4:55 PM
Oh fascinating.
Today I learned that apparently the gamma associated with Cs137 decay…
…is actually because a large majority fraction of Cs137 decays into Barium137m* which emits gamma when it drops to ground.
*a metastable nuclear isomer.
Today I learned that apparently the gamma associated with Cs137 decay…
…is actually because a large majority fraction of Cs137 decays into Barium137m* which emits gamma when it drops to ground.
*a metastable nuclear isomer.
November 29, 2025 at 1:53 PM
How in the name of god would Cs137 end up at the processing plant?!?
August 29, 2025 at 4:32 PM
How in the name of god would Cs137 end up at the processing plant?!?
We have unanswered questions.
Where did the release happen? (we have a guess)
When did it happen? How long in duration?
What is the source term? (Cs137)
How large was the release?
Who did the source originally belong to?
Why wasn't it caught before release?
Where did the release happen? (we have a guess)
When did it happen? How long in duration?
What is the source term? (Cs137)
How large was the release?
Who did the source originally belong to?
Why wasn't it caught before release?
September 30, 2025 at 1:16 AM
We have unanswered questions.
Where did the release happen? (we have a guess)
When did it happen? How long in duration?
What is the source term? (Cs137)
How large was the release?
Who did the source originally belong to?
Why wasn't it caught before release?
Where did the release happen? (we have a guess)
When did it happen? How long in duration?
What is the source term? (Cs137)
How large was the release?
Who did the source originally belong to?
Why wasn't it caught before release?
I was under the impression one doesn’t just bring an easily broken or opened glass jar of Cs137 in for food irradiation?!?
August 29, 2025 at 4:36 PM
I was under the impression one doesn’t just bring an easily broken or opened glass jar of Cs137 in for food irradiation?!?
This also says something about the capability to detect eg Cs137 at ports.
Beyond quality control, the episode carries broader implications for #nuclear radiation pollution.
Just a few slips , and ...
www.internationalaffairs.org.au/australianou...
Just a few slips , and ...
www.internationalaffairs.org.au/australianou...
When Radioactive Traces Stop at America’s Border: Why Indonesia Must Treat Its Export Scandals as a Strategic Warning - Australian Institute of International Affairs
A cascade of radioactive contamination has triggered an unprecedented trade crisis for Indonesia, exposing decades-old industrial safety gaps that now threaten the country’s reputation as a reliable g...
www.internationalaffairs.org.au
December 1, 2025 at 4:38 PM
This also says something about the capability to detect eg Cs137 at ports.
Contamination with radioactive UF6 or metallic uranium isn't that bad really. U235 is nowhere near as bad as Sr90, Cs137, etc. as in its fission products. There will not be significant fission products unless there has been a criticality incident. Otherwise it's a plain old boring alpha emitter.
March 30, 2026 at 2:35 AM
Contamination with radioactive UF6 or metallic uranium isn't that bad really. U235 is nowhere near as bad as Sr90, Cs137, etc. as in its fission products. There will not be significant fission products unless there has been a criticality incident. Otherwise it's a plain old boring alpha emitter.
Mais qu’on panique encore 15j après les retombées, alors que l’évacuation s’est passée en bon ordre, que personne ou presque n’est irradié, que seul du Cs137 et I 131 sont à l’atmosphère, ça c’est dramatique.
Pourtant, on sait (depuis TMI !) que le bilan radiologique « prouvable » sera 0.
Pourtant, on sait (depuis TMI !) que le bilan radiologique « prouvable » sera 0.
April 27, 2026 at 6:44 AM
Mais qu’on panique encore 15j après les retombées, alors que l’évacuation s’est passée en bon ordre, que personne ou presque n’est irradié, que seul du Cs137 et I 131 sont à l’atmosphère, ça c’est dramatique.
Pourtant, on sait (depuis TMI !) que le bilan radiologique « prouvable » sera 0.
Pourtant, on sait (depuis TMI !) que le bilan radiologique « prouvable » sera 0.
Das ist richtig.
Die Frage ist: wollen wir davon abhängig bleiben?
Die Frage ist: wollen wir davon abhängig bleiben?
July 18, 2026 at 8:36 AM
Das ist richtig.
Die Frage ist: wollen wir davon abhängig bleiben?
Die Frage ist: wollen wir davon abhängig bleiben?
A pretty spicy Cs-137 Spark Gap tube!
Unfortunately all the markings have rubbed off so I’m unable to identify it but based on the high doserate, I’m guessing the original activity was 5uCi!
If anyone has info on this tube, let me know!
#hobbynuke #nukesky #radioactivity #nuclear #radiation #cs137
Unfortunately all the markings have rubbed off so I’m unable to identify it but based on the high doserate, I’m guessing the original activity was 5uCi!
If anyone has info on this tube, let me know!
#hobbynuke #nukesky #radioactivity #nuclear #radiation #cs137
October 30, 2025 at 10:58 PM
A pretty spicy Cs-137 Spark Gap tube!
Unfortunately all the markings have rubbed off so I’m unable to identify it but based on the high doserate, I’m guessing the original activity was 5uCi!
If anyone has info on this tube, let me know!
#hobbynuke #nukesky #radioactivity #nuclear #radiation #cs137
Unfortunately all the markings have rubbed off so I’m unable to identify it but based on the high doserate, I’m guessing the original activity was 5uCi!
If anyone has info on this tube, let me know!
#hobbynuke #nukesky #radioactivity #nuclear #radiation #cs137
And with a well fitting mask & anti-contam clothing the risk of internal or even skin contamination can be enormously reduced. And pripyat is what pripyat is at this point the 1/2 lives of Sr90 & Cs137 are 28ish & 30ish years so…
February 26, 2024 at 2:50 AM
And with a well fitting mask & anti-contam clothing the risk of internal or even skin contamination can be enormously reduced. And pripyat is what pripyat is at this point the 1/2 lives of Sr90 & Cs137 are 28ish & 30ish years so…
We are fortunate that our varied plots of land don't have Cs137 all over. I checked at least one with the gamma-ray spectrometer.
March 6, 2026 at 5:52 PM
We are fortunate that our varied plots of land don't have Cs137 all over. I checked at least one with the gamma-ray spectrometer.
so you can download .csv and view it in InterSpec, for example 👍 here's some quick Cs137 (a very low activity source)
November 21, 2025 at 1:22 PM
so you can download .csv and view it in InterSpec, for example 👍 here's some quick Cs137 (a very low activity source)
汚染土壌は県外で最終処分という話、あーでもないこーでもないやってるうちにCs137の半減期（30年）が過ぎて数字的に汚染なくなりましたので別に県内外のどこで最終処分してもいいよね、というオチがあり得ると思っている
September 14, 2025 at 10:08 AM
汚染土壌は県外で最終処分という話、あーでもないこーでもないやってるうちにCs137の半減期（30年）が過ぎて数字的に汚染なくなりましたので別に県内外のどこで最終処分してもいいよね、というオチがあり得ると思っている
A spent fuel pool would be pretty interesting. A lot of Cs137 in one place without full containment.
Note, I'm not so sure about your assertion. Chernobyl happened to blow up due to a LoCA, I imagine blowing it up with weapons would have the same effect?
Note, I'm not so sure about your assertion. Chernobyl happened to blow up due to a LoCA, I imagine blowing it up with weapons would have the same effect?
July 29, 2026 at 6:38 AM
A spent fuel pool would be pretty interesting. A lot of Cs137 in one place without full containment.
Note, I'm not so sure about your assertion. Chernobyl happened to blow up due to a LoCA, I imagine blowing it up with weapons would have the same effect?
Note, I'm not so sure about your assertion. Chernobyl happened to blow up due to a LoCA, I imagine blowing it up with weapons would have the same effect?
As the son of a radiochemist whose entire career was studying radioactive wildlife, I’m immediately wondering how many mSV I’d get eating a pound of this shrimp and how many pounds I’d need to eat to ingest a single milligram of Cs137.
Without the dosage data it’s a non-story.
Without the dosage data it’s a non-story.
August 19, 2025 at 9:59 PM
As the son of a radiochemist whose entire career was studying radioactive wildlife, I’m immediately wondering how many mSV I’d get eating a pound of this shrimp and how many pounds I’d need to eat to ingest a single milligram of Cs137.
Without the dosage data it’s a non-story.
Without the dosage data it’s a non-story.
Was für ein Unsinn. Vor den Nuklearkatastrophen und Kernwaffentests gab es keine künstlichen Radionuklide, wie Cs137 oder Sr90, die sich im Boden ansammeln und dann über Nahrung im Körper (v.a. letzteres in Knochen und Zähnen aufgrund der Ähnlichkeit zu Kalzium). Ersteres, eher wie Kalium als Salz,
April 25, 2026 at 6:03 AM
Was für ein Unsinn. Vor den Nuklearkatastrophen und Kernwaffentests gab es keine künstlichen Radionuklide, wie Cs137 oder Sr90, die sich im Boden ansammeln und dann über Nahrung im Körper (v.a. letzteres in Knochen und Zähnen aufgrund der Ähnlichkeit zu Kalzium). Ersteres, eher wie Kalium als Salz,
Par contre le Cs137, c'est plus inattendu
Surprenant
Merci
Surprenant
Merci
September 11, 2025 at 9:42 PM
Par contre le Cs137, c'est plus inattendu
Surprenant
Merci
Surprenant
Merci
cs137... wasn't that george lucas's u.s.c. thesis film?
August 20, 2025 at 9:20 AM
cs137... wasn't that george lucas's u.s.c. thesis film?
海へおかえり…………(海に返されるCs137達)
January 18, 2026 at 3:31 PM
海へおかえり…………(海に返されるCs137達)
Why in the world would CS137 be anywhere near food?
September 23, 2025 at 11:00 AM
Why in the world would CS137 be anywhere near food?
This is rather strange, I wish they would tell the concentration. My bet is this is not due to "insanitary conditions", I see no scenario where Cs137 would be involved in the preparation. It is most likely a natural ingestion by the shrimp - and a contamination (waste dump?) at the fishing site.
August 19, 2025 at 8:42 PM
This is rather strange, I wish they would tell the concentration. My bet is this is not due to "insanitary conditions", I see no scenario where Cs137 would be involved in the preparation. It is most likely a natural ingestion by the shrimp - and a contamination (waste dump?) at the fishing site.