Nuclear medicine practitioners just havent been able to catch a break. First, Canadas National Research University Reactor at Chalk River in Ontario shuts down for repairs, followed by the High Flux Reactor in Petten, the Netherlands. Then just as the Maria Research Reactor in Poland began to produce medical isotopes in March, that supply was interrupted in April by an act of naturethe eruption of the Eyjafjallajkull volcano in Iceland that grounded air transatlantic and intra-European travel for a week.