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  #51  
Old 05-14-2019, 08:37 AM
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Broomstick is offline
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Quote:
Originally Posted by clairobscur View Post
Well, that they needed to see the chunk of graphite is unbelievable. I mean, if your car runs out of oil, you're warned, but when your reactor's core explodes, nothing? Not a even a flashing light with "you're all fucked" on it?
I've known a number of people who have car dashboards lit up like Christmas with blinking lights who nonetheless tried to continue driving said vehicle.

Sure, there were all sorts of warning signs. People ignored them, because they couldn't believe it was that bad. That is the very essence of denial.
  #52  
Old 05-14-2019, 11:09 PM
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Originally Posted by TimfromNapa View Post
Dentists and technicians still leave the room while you are x-rayed. That has not changed in this universe - the one where Spock is clean-shaven.
I went to the dentist today. She took five x-rays without leaving the room. She used a handheld emitter. The receiver in my mouth was hooked up to a computer. Perhaps your dentist still uses the old film method?

https://www.google.com/search?q=are+...+machines+safe

Last edited by Pascal666; 05-14-2019 at 11:10 PM.
  #53  
Old 05-14-2019, 11:24 PM
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Originally Posted by MarvinKitFox View Post
*During * a meltdown?

Forget about the gamma radiation, a mere 5-10cm of lead will attenuate that down to safe levels.

You need to worry about the neutron flux, shielding against that requires not only different materials, but which materials work best vary depending on the source/energy of the neutrons. To shield against what an active meltdown emits, you would need about 2 meters of water, *then* 5cm of lead. Just having the water, or just having the lead, will not stop very much.
Not that anyone is likely to be exposed to these levels of radiation without training, but NO.
10 cm of lead will stop a percentage of gamma radiation, but if the source is intense enough that bit of lead won't save you.
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Old 05-14-2019, 11:34 PM
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Edit window ate my emendation...

Quote:
Originally Posted by AK84 View Post
Gamma needs 5 cm or 2 inches of lead to be safely blocked.
Make a suit which has 2 inches of lead behind it. Good luck.
Quote:
Originally Posted by MarvinKitFox View Post
*During * a meltdown?

Forget about the gamma radiation, a mere 5-10cm of lead will attenuate that down to safe levels.

You need to worry about the neutron flux, shielding against that requires not only different materials, but which materials work best vary depending on the source/energy of the neutrons. To shield against what an active meltdown emits, you would need about 2 meters of water, *then* 5cm of lead. Just having the water, or just having the lead, will not stop very much.
Not that anyone is likely to be exposed to these levels of radiation without training, but NO.
10 cm of lead will stop a percentage of gamma radiation, but if the source is intense enough that bit of lead won't reduce it enough to save you.

I haven't watched this show, but the accident was analyzed thoroughly in the aftermath for lessons learned. Alarms were probably disabled or ignored, because the reactor was foolishly being run in an abnormal mode for testing.
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