Converting rads to sieverts requires some math and extra info, but it works about like this.
First, you have to convert rads to grays. 100 rads=1 gray, so 62 rads= .62 gray.
Then you need to know the type of radiation to convert to sieverts, because to convert from gy to Sv requires multiplying the amount of radiation in
grays by weighting factors. Let's assume for the sake of explanation that it's full body gamma radiation, which requires no further math and sets
the lowest baseline for the amount of exposure with its weighting factors of 1. That equates 1 gray of gamma radiation to an equivalent dose of 1
sievert. That makes .63 gray into .63 sievert. (For the record, 100 rems is typically called at 1 sievert, as the rem is the associated equivalent
dose for the rad.)
To convert sieverts to millisieverts, move the decimal place the correct number of spaces over.
So... 62 rads of gamma radiation=.62 gray gamma radiation=.62 sievert=620 millisievert (Close to reported levels of one of the radiation spikes, so
either the spike was much higher than reported, or the Pacific ain't so great at dissipating radiation; either way, the world and the Japanese people
were lied to.)
According to modern medicine, however you slice it, that is enough radiation to cause a decreased white cell and other blood count, but not induce
illness in a healthy person. That means it's quite enough to cause genetic damage in any person, and it may
be enough to compromise the immune
response of individuals with diseases such as leukemia or HIV in which decreased white cell count is already an issue.
Originally posted by Agarta
From what I understand, and I may be wrong, but it isn't dangerous until 150. If this is the case it's not even half way there. I don't see the
problem. If I am understanding incorrectly help me to understand.
It is dangerous at anything above high background radiation, like just existing day to day in Denver or other places with a high, natural radiation
level. Radiation sickness can hit as low as 100 rems, but cancer and birth defect-inducing levels are much, much lower. (As far as I know, science has
not quantified the lower threshold for genetic damage by radiation.)