0-50 rads - No obvious short-term effects
80-120 rads - You have a 10% chance of vomiting and experiencing nausia for
a few days
130 -170 rads - You have a 25% chance of vomiting and contracting other
symptoms
180-220 rads - You have a 50% chance of vomiting and having other severe
physical effects
270-330 rads - 20% chance of death in 6 weeks, or you will recover in a few
months.
400-500 rads - 50% chance of death
550-750 rads - Nausia within a few hours ; no survivors
> 1000 rads - immediate incapacitation and death within a week or less. http://www.solarstorms.org/Sradiation.html