I'm not an expert on these matters, but there certainly are some people who are very concerned that the drive for both nuclear power and nuclear enrichment has led Iran to make some decisions that were environmentally unwise and that raise real dangers of accidents.
It is the case that Iran does not have in place a regulatory framework, a system of monitoring, and a system of responding to accidents. The kinds of steps that the IEA encourages countries embarking on nuclear power, much less nuclear enrichment, to take, Iran has not taken.
The IEA has a whole program that's designed to help a country. For instance, the United Arab Emirates is working with the IEA to develop a model program for regulating, monitoring, and responding to accidents. Iran has done extremely little in this regard.