The problem is that dosimeters only measure measurable radiation. The author seems to be worried about immeasurable phantom radiation.
LOL! Yes, I know that.
Ok, you do realize that the uranium fuel in the atomic bombs was only a few pounds much of which was consumed by fission in the blast?
The Fukishima plants have thousands of tons of uranium onsite which are at risk of burning whereby radioactive particulate is released into the environment with very little fission to consume the fuel beforehand.
A few pounds vs. thousands of tons is a significant scaling issue.