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Old 05-14-2019, 11:24 PM
sps49sd is offline
Join Date: Feb 2009
Posts: 331
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.