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Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Andy wrote ...
As Small, I think they meant, if you ingested radioactive substances, it would be best to drink, because most paths workout to your stuffed....
Well, I found this:
"Antioxidant supplementation during radiation therapy poses a conundrum for the radiation oncologist, as antioxidants that protect normal cells from reactive oxygen species may provide the same benefits to cancer cells and reduce the efficacy of treatment. Short- and long-term injury to healthy cells, including tissue damage and increased risk of oncogenic transformation, can be prevented by antioxidants, as seen experimentally. New findings that antioxidants induce apoptosis in cancer cells and protect patients from painful side effects of radiation treatment may prove these compounds useful in future adjuvant therapy."
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Ash Small wrote ...
Andy wrote ...
As Small, I think they meant, if you ingested radioactive substances, it would be best to drink, because most paths workout to your stuffed....
Well, I found this:
"Antioxidant supplementation during radiation therapy poses a conundrum for the radiation oncologist, as antioxidants that protect normal cells from reactive oxygen species may provide the same benefits to cancer cells and reduce the efficacy of treatment. Short- and long-term injury to healthy cells, including tissue damage and increased risk of oncogenic transformation, can be prevented by antioxidants, as seen experimentally. New findings that antioxidants induce apoptosis in cancer cells and protect patients from painful side effects of radiation treatment may prove these compounds useful in future adjuvant therapy."
Which is 'sort of' relevant.
At Fukushima, as at Chernobyl and Kyshtym, the big issue is not about acute exposure to radiation, but chronic internal expsoure by the ingestion of radionuclides, importantly caesium-137, strontium-90, and iodine-131. In this regard, data and observations derived from radiotherapay and X-radiography - short term acute exposure - is not especially helpful. When the machine is switched off, radiation exposure stops, and no more cells are damaged.
Ingested and inhaled material may be deposited or lodged in organs, bones, teeth, and lungs from where they bombard the surrounding tissue for years, and lifetimes. In 1963, it was discovered that in parts of the United States exposed to A-bomb fallout from the Nevada atomic tests 1945-1962, the level of Sr-90 in childrens' teeth was up to 50 times higher than control samples from areas far removed from fallout paths. Radiation Countermeasures for Treatment of Internal Contamination
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Shrad wrote ...
why the heck don't they use a quadcopter or something like this to get closer and take real measurement ?
I'm just guessing here, but would they require thick lead shielding to protect the electronics from the huge amounts of radiation present, thus making your average quad-copter too heavy to fly?
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Ash Small wrote ...
Shrad wrote ...
why the heck don't they use a quadcopter or something like this to get closer and take real measurement ?
I'm just guessing here, but would they require thick lead shielding to protect the electronics from the huge amounts of radiation present, thus making your average quad-copter too heavy to fly?
(just a wild guess)
'Hardened' components and circuits capable of operating on the 'nuclear battelfield' are well understood and available, so I think it's more likely that costly drones which become contaminated - by the steam plume, for example - have to be written off, and taken to a radioactive waste dump, a place like the Chernobyl Graveyard which must exist at Fukushima, but of which pictures have yet to emerge. Keeping flying objects at a good height probably increases their service life, before it's off to the Graveyard you go.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Ash Small wrote ...
Shrad wrote ...
why the heck don't they use a quadcopter or something like this to get closer and take real measurement ?
I'm just guessing here, but would they require thick lead shielding to protect the electronics from the huge amounts of radiation present, thus making your average quad-copter too heavy to fly?
(just a wild guess)
no. hardend semiconductors for military and spacecraft use are cheap and available. And the shielding of sensitive parts would be minimal. A tri-copter would be best, as quads are clearly for pansies. most of the cost is in instrumentation they would carry, the bots themselves are getting scary cheap... even a "single-flight-then-graveyard" cost would be cheaper than exposure for three humans and all its safety precuations.
besides there are tasks only humans can do, like turning a wrench on an important valve in some radioactive place. But no human should use up part of their lifetime exposure quota, doing something stupid like measuring a common radiation field. Any manager ordering a subordinate to do so, should be summarily executed, for crimes against humanity and good judgement.
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Fukushima
