Work recently published in the journal Chemosphere has documented the presence of large amounts of highly radioactive, poorly soluble cesium rich micro-particles (CsMPs) in an abandoned school building close to the Fukushima Daiichi Nuclear Power Plant (FDNPP).
Click here for original story, Significant presence of cesium-rich microparticles in an abandoned school close to the Fukushima nuclear power plant
Source: Phys.org