Iran announced that it has begun construction of a fourth nuclear research reactor in the country. On Monday, the concrete foundation for a reactor with a capacity of 10 megawatts was poured in the megacity of Isfahan, Iranian nuclear programme boss Mohammad Eslami said, according to state news agency IRNA. In addition to Isfahan, other research reactors in Iran are located in the industrial city of Arak and near the capital Tehran. Just a few days ago, Eslami spoke about the construction of four nuclear power plants in the south of the country. The plants on the Gulf in the province of Hormoz…