File: cherenkov radiation.swf-(6.98 MB, 1280x720, Other)
[_] Anonymous 12/03/15(Thu)21:50:05 No.2968388
Marked for deletion (old).
>> [_] Anonymous 12/03/15(Thu)22:13:14 No.2968408
Cherenkov radiation, also known as Vavilov-Cherenkov radiation, (also spelled Čerenkov or
Cerenkov) is electromagnetic radiation emitted when a charged particle (such as an electron)
passes through a dielectric medium at a speed greater than the phase velocity of light in that
medium. The characteristic blue glow of an underwater nuclear reactor is due to Cherenkov
radiation. It is named after Soviet scientist Pavel Alekseyevich Cherenkov, the 1958 Nobel Prize
winner who was the first to detect it experimentally. A theory of this effect was later developed
within the framework of Einstein's special relativity theory by Igor Tamm and Ilya Frank, who
also shared the Nobel Prize. Cherenkov radiation had been theoretically predicted by the English
polymath Oliver Heaviside in papers published in 1888–1889.
>> [_] Anonymous 12/03/15(Thu)22:14:50 No.2968411
Very cool.
Is this type of radiation necessarily deadly to humans?
>> [_] Anonymous 12/03/15(Thu)22:20:01 No.2968420
>>2968411
Ask Hisashi Ouchi.
>> [_] Anonymous 12/03/15(Thu)22:44:39 No.2968441
>>2968420
The man who experienced the greatest pain and suffering that has ever been experienced by any
human being was named Ouchi
>> [_] Anonymous 12/03/15(Thu)22:54:35 No.2968449
>>2968441
Pronounced "oh ooo chee"
>> [_] Anonymous 12/03/15(Thu)22:54:59 No.2968450
I felt that from here.
>> [_] Anonymous 12/03/15(Thu)22:55:21 No.2968451
>>2968449
ok
>> [_] Anonymous 12/03/15(Thu)22:55:50 No.2968452
>>2968449
Dude shut the fuck up that was a good joke.
I didn't even think of it because I mentally pronounced it the real way.
>>2968441
Thanks for the laugh, anonybro.
>> [_] Anonymous 12/03/15(Thu)22:58:31 No.2968455
>>2968452
Eh, I think the joke is pretty dumb.
>Lol, the dudes skin fell off, his DNA was destroyed, and they kept him alive as long as they
could to study what happened to him.
>His name was "ouchy" lolololol
>muh sides!
>> [_] Anonymous 12/03/15(Thu)22:58:32 No.2968456
>>2968411
No.
>> [_] Anonymous 12/03/15(Thu)23:06:55 No.2968464
>>2968420
fucking hell. I did not need to read all that I just did.
His last words he wrote down were "Mommy Please". No sleep for me tonight
>> [_] Anonymous 12/03/15(Thu)23:13:22 No.2968469
>>2968455
made me lol
>> [_] Anonymous 12/04/15(Fri)00:15:31 No.2968538
>>2968408
came here for this, thanks
>> [_] Anonymous 12/04/15(Fri)00:22:34 No.2968552
>>2968455
Sorry I don't read dissertions to get my laughs, anon
>> [_] friendsofsandwiches 12/04/15(Fri)00:35:16 No.2968569
heJCOplantneededtomixsomehigh-purityenricheduraniumoxidewithnitricacidtoformuranylni
trateforshipping.ThedissolvingandmixingbeganonSeptember28,1999.OnthemorningofSeptemb
er30,1999,threetechnicians,HisashiOuchi,MasatoShinohara,andYutakaYokokawa,wererunnin
gfuelthroughthelaststepsoftheconversionprocess.Tospeeduptheprocess,theymixedtheoxide
andnitricacidin10-literstainlesssteelbucketsratherthaninthedissolvingtank.Indoingso,
theyfollowedthepracticethatJCOhadwrittenintoitsoperatingmanualbutwhichhadnotreceived
STAapproval.Forconvenience,theyaddedthebucketcontentsdirectlytothe45-cm-diameter,wat
er-jacketedprecipitationtankratherthantothebuffertank.Thatwasacrucialerrorbecausethe
tall,narrowgeometryofthebuffertankwasdesignedtoprecludetheonsetofcriticality.Infilli
ngtheprecipitationtank,thecrewaddedsevenbuckets,amountingtoatotalofabout16kg
(35 lbs of enriched uranium, or roughly seven times more uranium than permitted under the STA
license.
>> [_] friendsofsandwiches 12/04/15(Fri)00:39:05 No.2968572
Thethreetechnicianswereworkinginasmallprocessingbay.MasatoShinoharastoodonaplatforma
ndwaspouringtheuranylnitratesolutionintotheprecipitationtankwhileHisashiOuchiheldagl
assfunnelinaninletatthetopofthetank.Thethirdtechnician,YutakaYokokawa,wasseatedatade
skapproximately4meters(13feet)awayfromtheprecipitationtank.Atapproximately10:35a.m.t
hetechniciansaddedtheseventhbucketandsawablueflash.Thetwotechniciansnearthevesselbeg
antoexperiencepain,wavesofnausea,somedifficultyinbreathing,andproblemswithmobilityan
dcoherence.Thegammaradiationalarmsactivatedimmediately.Theblueflashthattheyhadseenwa
saresultoftheCherenkovradiationthatisemittedwhennuclearfissiontakesplaceandionizesai
r.Theadditionoftheseventhbuckethadcausedaself-sustainingchainreaction.Themixture,ino
therwords,hadgonecritical.Mixingintheprecipitationtankcausedthefissileuranium
species to disperse so that the reaction fizzled out. However, the critical mass later
reassembled, initiating another chain reaction that released more neutrons and gamma radiation.
This cycle was repeated several times over many hours
>> [_] friendsofsandwiches 12/04/15(Fri)00:40:24 No.2968574
None of the three technicians realized what had happened. Mr. Ouchi had been draped over the top
of the tank and was experiencing the greatest difficulty. The other two workers helped him out of
the building in response to the gamma radiation alarms. A worker in an adjoining building noticed
the injured and confused technicians and called for medical assistance. An ambulance arrived
quickly and removed the affected workers. No one at JCO initially understood the nature of the
problem and management eventually requested help from other nearby technical facilities.
Uncertainty existed among workers and management about evacuation of the premises or other action
that should be taken. Workers were given the option to remain at their jobs or to go home.
>> [_] friendsofsandwiches 12/04/15(Fri)00:42:33 No.2968576
The exact critical mass for the 18.8% uranium mixture in the JCO precipitation tank is not known.
In the Joyo reactor, the minimum critical mass for the solid 18.8% uranium fuel is about 46 kg
(101 lbs). But the critical mass is greatly reduced when the fuel is in solution because water
acts as a "moderator." Light atoms such as hydrogen slow the neutrons released by decaying 235U
nuclei between fissions, making it more likely that they will be absorbed and trigger another
nucleus to decay. The critical mass was further reduced at Tokaimura because a water jacket
surrounding the precipitation tank reflected neutrons back into the tank.
>> [_] friendsofsandwiches 12/04/15(Fri)00:43:52 No.2968577
At 2:30 a.m. on October 1, 1999, JCO staff recognized the need to bring the precipitation tank
under control and initiated a plan to drain the cooling jacket. Draining water from the cooling
jacket would cause the reaction to cease. This proved difficult and required workers to dismantle
pipes leading from the jacket. The workers could work in the irradiated building for only a few
minutes at a time. The jacket was later purged with argon. Boric acid (effective for absorbing
neutrons) was pumped into the tank in order to mitigate the chain reaction. The reaction was
arrested at approximately 6:00 a.m. on October 1. Judging from the levels of gamma and neutron
radiation measured near the plant perimeter, the criticality excursion seems to have lasted about
20 hours. After that time, the radiation levels dropped below detection limits.
>> [_] friendsofsandwiches 12/04/15(Fri)00:45:58 No.2968578
okay, does anyone else now feel the need to take a blasting shower and scrub yourself with steel
wool?
>> [_] Anonymous 12/04/15(Fri)00:52:40 No.2968582
>>2968388
Link to video please?
>> [_] Anonymous 12/04/15(Fri)00:57:59 No.2968587
>>2968578
Not really as you seem to be describing cleaning procedures, but they don't particularly help
with the presence of dangerous radiation.
>> [_] friendsofsandwiches 12/04/15(Fri)01:00:46 No.2968590
>>2968587
I know... I know, I just... fuck..
reading all that just makes me all...
eeuuuggghghghhgh
>> [_] Anonymous 12/04/15(Fri)01:00:59 No.2968591
>>2968587
Do you have emotions?
>> [_] Officer 12/04/15(Fri)01:01:53 No.2968594
>>2968578
Moral of the story: ensure that everything's approved and regulated in your work. Don't take
shortcuts and prepare your fighter to go through the gauntlet known as Bureaucracy and come back
unscathed.
>> [_] Anonymous 12/04/15(Fri)01:19:57 No.2968608
i have seen some really fucked up shit in my time on the internets. i think this takes the cake.
how the actual fuck is it possible they kept him alive that long, after what happened?
>> [_] Anonymous 12/04/15(Fri)01:23:43 No.2968611
>>2968591
He's dead. Did you know him personally? Why do you care?
>> [_] Anonymous 12/04/15(Fri)01:30:07 No.2968615
>>2968608
They really, really, wanted to see what happens to someone after something like that.
>> [_] Anonymous 12/04/15(Fri)01:40:29 No.2968624
>>2968611
Human empathy doesn't require personal interaction, generally. I suspect you have those feelings,
but you can't tell because they're undetectable beneath the stranglehold your mind has over your
heart.
>> [_] Anonymous 12/04/15(Fri)01:46:33 No.2968630
>>2968624
Sorry, senpai. I mean, it sucks for him and his family, but it really doesn't affect me. That'd
be like if I cried over every starving kid in Africa. Not gonna feel bad over it. People die.
>> [_] Anonymous 12/04/15(Fri)01:52:36 No.2968633
>>2968630
That's okay Kohai. I'll keep you alive, to see what happens.
