Yeah, that doesn't make sense. LD50 for prompt exposure is 4-5 sieverts. 1 sievert of exposure translates to about a 1% lifetime cancer risk. Now, if you're

Yeah, that doesn't make sense. LD50 for prompt exposure is 4-5 sieverts. 1 sievert of exposure translates to about a 1% lifetime cancer risk. Now, if you're inhaling the ash that's another matter. At that point you're probably dead.