[Wientje]

my guess: 400 times the daily dose is what you would get from natural radiation in a year. This amounts to about 2 milli Sievert depending on where you live. Articifial radiation of which 95% comes from medical scans is also about 2 mSv.

So the dose recieved is the same as the average person gets a year in medical scans. So those people in the area shouldn't have a scan next year.

The negative effects on health from these levels of radiation are in increased risk of cancer.

To suffer from direct radiation poisoning, the those would have to be many orders stronger. In Chernobyl, this happened to the firefighters on site without protective clothing and an exposed and active core.

All in all, the risks for the population so far a very minimal apart from the increased risk of cancer.