Far more worrying are several radioactive chemicals released as particles about one-quarter the size of a grain of sand. These include iodine-131, strontium-90 and cesium-137.

更令人担忧的是一些释放出的颗粒状放射性化学物质，这些颗粒仅仅是沙粒大小的四分之一，它们包括碘- 131、锶- 90和铯- 137。