“…by removal and safe storage of soil) an excess dose of y to a level of s is c(y,s). The evidence on the functional form of c is scanty (Brown et al, 1996, Thiessen et al, 2009). However, in the wake of the Fukushima accident, the Japanese government has organized a number of decontamination pilot projects in different locations and environments (Japan Atomic Energy Agency, 2012).…”