“…Despite the substantially larger release of readily detectable fission products from Kyshtym, both the initial direction of travel of the plume, and the lack of any public announcement of the accident, made it unlikely that the accident would have been detected by monitoring in Europe. The trajectory of the Windscale plume has been the subject of a number of long-range atmospheric dispersion modelling studies (Apsimon et al, 1985;Nelson et al, 2006;Johnson et al, 2007); it would be interesting to see studies of this kind applied to the Kyshtym accident to establish whether any appreciable amount of activity may have reached Europe, and whether it might have been detected at the time if monitoring organisations were alert to the possibility.…”