[dEnigma]

No worries. Re-reading your original comment I also realized that the quote you begin with talks about "dangerous levels" of radiation, which I suppose should prime one for the fact that you were talking about unsafe exposure levels. Regarding the "acute", I think I mixed up my previous "actual radiation sickness" with the "acute" in ARS there. You're right of course about it normally being used for short-term effects. So that would be another hint that what you were calculating was not the threshold for radiation sickness.