Radovanu is a commune in Călărași County, Muntenia, Romania. It is composed of two villages, Radovanu and Valea Popii. As of 2007 th…Radovanu is a commune in Călărași County, Muntenia, Romania. It is composed of two villages, Radovanu and Valea Popii. As of 2007 the population of Radovanu is 4,695.