311–320 of 357 posts
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https://en.wikipedia.org/wiki/Goi%C3%A2nia_accident Stuff of nightmares.
Or in a wall of a building: https://en.wikipedia.org/wiki/Kramatorsk_radiological_accide...
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Not op, or an expert on radiation poisoning, but, one can receive a lethal dose of radiation in an instant (and be condemned to certain death) but not die for weeks. Credentials: I've read about the demon core[0] and watched Chernobyl on HBO. [0] https://en.wikipedia.org/wiki/Demon_core
Or months if your family/the doctors prolong your suffering. https://en.wikipedia.org/wiki/Tokaimura_nuclear_accidents#Im...
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Any recommendations for detection at home? Are wearable dosimeters enough to detect before damage occurs? ...or if there is already a crowdsourced detection effort for looking out for this sort of thing, that'd be a cool map to plot.
Yes, I recommend mine ;) ... the "Better Geiger S-1" In the budget price range (~$150 and under) my detector, which uses a solid scintillator, and a traditional Geiger tube based device are really the only options worth considering. The pros of my detector are high range (max 20 mSv/hr vs typically 1 mSv/hr for common Geiger tubes), roughly 3x higher X-ray/gamma sensitivity, and automatic energy-correction of dose ra…
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This is an interesting algorithm problem. Given the parameters to maximize detection and minimize time/resources, how would you direct a drone or something to find the capsule? How would that change with 2 drones? 4? 8? As many drones as there are flyable Geiger counters in the country?
You'd pretty much start with a local radiometric survey company (there are a few in Perth) using a 50 litre doped sodium iodide cyrstal pack (a bit heavy for a drone) and scintillation counters in a crop duster flying at 40 m ground clearence dead centre down the road at 70 m/sec for the full 1,400 km road length. Post process the 256 value gamma spectrum, correcting for cosmic, aircraft signature, remove the mean av…
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Not op, or an expert on radiation poisoning, but, one can receive a lethal dose of radiation in an instant (and be condemned to certain death) but not die for weeks. Credentials: I've read about the demon core[0] and watched Chernobyl on HBO. [0] https://en.wikipedia.org/wiki/Demon_core
Or months if your family/the doctors prolong your suffering. https://en.wikipedia.org/wiki/Tokaimura_nuclear_accidents#Im...
Radiation detection is my specialty. This source is Cs-137, few hundred mCi. It's easy to detect within a few seconds at distances of a few tens of meters or more with professional detection equipment if there is direct line of sight. If it was knocked off the road, though, the question will be if it fell into a crack or other such place because then the radiation is somewhat shielded and it would take much more meas…
Any recommendations for detection at home? Are wearable dosimeters enough to detect before damage occurs? ...or if there is already a crowdsourced detection effort for looking out for this sort of thing, that'd be a cool map to plot.
Earlier quoted context omitted.
You'd pretty much start with a local radiometric survey company (there are a few in Perth) using a 50 litre doped sodium iodide cyrstal pack (a bit heavy for a drone) and scintillation counters in a crop duster flying at 40 m ground clearence dead centre down the road at 70 m/sec for the full 1,400 km road length. Post process the 256 value gamma spectrum, correcting for cosmic, aircraft signature, remove the mean av…
What literature would you recommend to better understand these procedures?
Guidelines for radioelement mapping using gamma ray spectrometry data International Atomic Energy Agency (2003)
https://www-pub.iaea.org/mtcd/publications/pdf/te_1363_web.p...
Or go full Aussie, Aussie, Oy, Oy, Oy
https://www.ga.gov.au/scientific-topics/disciplines/geophysi...
and read the three publications linked at bottom and get the high res A0 wall map for the dorm room !
( A GUIDE TO THE TECHNICAL SPECIFICATIONS FOR AIRBORNE GAMMA-RAY SURVEYS Grasty + Minty
https://d28rz98at9flks.cloudfront.net/14861/Rec1995_060.pdf
and the other two )
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This is an interesting algorithm problem. Given the parameters to maximize detection and minimize time/resources, how would you direct a drone or something to find the capsule? How would that change with 2 drones? 4? 8? As many drones as there are flyable Geiger counters in the country?
I wonder if analog dosimeters might be a better way to narrow down the search area more cheaply and quicker to set-up. Fly or drive a run. Check dosimeter. Dunno if there's enough energy expected to set it off at the expected speeds travelled. Obviously they don't go "ding ding ding". Might find some spurious beta-radiation sources? https://www.uth.edu/safety/radiation-safety/personal-radiati...
I kept reading articles looking for this information, questioning what process could have possibly lead to this "surely it wasn't just standalone, surely it was in some form of lead box or something." This finally answers my question but leads to even more questions: Why is it just hanging out in the flatbed of a truck in a box? Does the driver know they're hauling something radioactive? Did nobody consider that this might happen?