[jahewson]

If you read the article to the end it is explained: the US gov does not believe that the dome contains any worse radiation than the surrounding area - which is already massively contaminated.

[JoeAltmaier]

I can't seem to find numbers to support 'massively'. This article says its near what New York's Central Park has (which is a normal amount):

https://magazine.scienceconnected.org/2016/06/marshall-islan...