Determining the Impact of Alpha-Particle-Emitting Contamination From the Fukushima-Daiichi Disaster on Japanese Semiconductor Manufacturing Sites

We review the major radioactive isotopes formed in nuclear reactors and consider how these were released and dispersed in the days following the Fukushima-Daiichi accident. The risk of contamination from uranium and plutonium isotopes at semiconductor manufacturing sites in Japan is discussed, and the first report of alpha-counting measurements is presented demonstrating that no alpha-emitting contamination was found in either of the two manufacturing facilities.