[ScubieNuc]

Nuclear power has many different nomiclatures for their measurements of radiation. For me, it’s easier to understand REM or radiation equivalent man.
1 millisievert =.1 REM.
Therefore 400 ms =40 Rem.

Here is the Rem dose guide line:

25-100 Rem...some sickness, not disabling
100-200 Rem...nausea, vomiting, 1% reduction in life expectancy
200-300 Rem....probable recovery in 3 months
300-600 Rem...Nausea, vomiting, diarrhea in first few hours. After a latent period of a week, loss of hair, malaise, fever, progressing to hemorrhage and emaciation in the third week. At about 500 rems, 50% die in 2 to 6 weeks.

> 600 Rem...Almost all those exposed die within weeks.

I wish the news or the industry was more clear on what these terms meant and didn’t use the ambiguous term “meltdown”. It just creates more confusion and panic.

[RummyChick]

Last night NHK was giving the various things that happen with the 400 millisievert exposure.

For some reason I zoned out every time.

I remember the words infertility and lymph.

[GonzoGOP]

It is important to remember that that chart is REMs per year. While the radiation measurements coming out last night was measured in per hour. And doses are cumulative. So while short exposures aren't dangerous you wouldn't want to work in a place where you were pulling 3 REM per hour.